Young aspen trees in Yellowstone are doing something they have not done in almost 100 years. Rather than sprouting and being eaten back to nubs by elk and bison, they're actually growing into tall, adult forest trees rising up towards the canopy.



This matters more than it might seem, because it shows what happens when a missing piece of an ecosystem returns.



<h2 class="wp-block-heading" id="h-yellowstone-aspens-and-elk">Yellowstone, aspens, and elk</h2>



In the 1920s, people <a href="https://www.yellowstone.org/wolf-project/" target="_blank" rel="noreferrer noopener">eliminated wolves in Yellowstone</a>. At the time, with limited scientific knowledge, managers believed it was the right thing to do.



<a href="https://www.earth.com/news/from-wolves-to-dogs-did-domestication-begin-without-human-help/">Without wolves</a>, elk herds grew very large. Elk love to eat aspen shoots - the tender young growth is highly palatable to them.



For roughly 70 years, elk browsed aspen sprouts down to stub height, and the trees couldn't grow. 



If you had walked through Yellowstone in the 1980s, you would have seen many tiny aspen shoots covering the ground, but almost no young trees gaining height. 



The forest's regeneration was stalled. Old trees died, and no new ones replaced them.



In 1995 and 1996, park managers reintroduced wolves into the <a href="https://www.earth.com/news/yellowstone-supervolcano-eruption-study-sparks-new-debate-on-where-and-when-it-will-erupt/">Yellowstone Park ecosystem</a>. Scientists hoped and wondered whether this would change anything for the trees.



<h2 class="wp-block-heading" id="h-why-aspen-matter-to-yellowstone">Why aspen matter to Yellowstone</h2>



Aspen groves provide habitat for many species. Birds nest in them. Beavers eat the bark and use the wood for dams. Butterflies and moths lay eggs on the leaves. 



Their canopy admits enough light for wildflowers and shrubs to grow beneath. When it rains, aspen groves hold water in the soil better than some other forest types.



In short, when aspen return, dozens of other species benefit. More trees support more insects, which in turn support more birds, enriching the ecosystem.



<h2 class="wp-block-heading" id="h-checking-the-trees-three-decades-later">Checking the trees three decades later</h2>



<a href="https://fwcs.oregonstate.edu/users/luke-painter" target="_blank" rel="noreferrer noopener">Luke Painter</a>, an ecologist at <a href="https://oregonstate.edu/" target="_blank" rel="noreferrer noopener">Oregon State University</a>, sought clear answers. His team returned to 87 aspen stands across Yellowstone that scientists had previously surveyed. 



They measured thousands of young trees, looked for bite marks, and counted how many stems were tall enough that elk could no longer reach the tips.



About a third of these stands now have many tall young aspens pushing toward the canopy. 



"About 26 of the 87 aspen stands we examined had large numbers of tall saplings throughout, a remarkable change from the 1990s when surveys found none at all," Painter said.



<h2 class="wp-block-heading" id="h-why-wolves-matter-to-yellowstone-aspens">Why wolves matter to Yellowstone aspens</h2>



Breaking it all down, the conclusions of this study are pretty simple. 



<a href="https://www.earth.com/news/wolves-move-pups-across-mountains-to-adapt-to-climate-pressure/">Wolves hunt elk</a>. When wolves came back, two things happened. First, elk numbers declined from unusually high levels. Second, elk changed their behavior. They spent less time in the same areas feeding.



With fewer elk and shorter feeding bouts, more aspen shoots survived long enough to exceed the browsing zone - about six to seven feet high. 



Once a sapling reaches that height, elk cannot easily reach the growing tip. The tree continues to grow.



"The reintroduction of large carnivores has initiated a recovery process that had been shut down for decades," Painter explained.



Scientists call this a <a href="https://www.nature.com/scitable/knowledge/library/trophic-cascades-across-diverse-plant-ecosystems-80060347/" target="_blank" rel="noreferrer noopener">trophic cascade</a> - when adding or removing one species causes changes that ripple through the whole system.



<h2 class="wp-block-heading" id="h-some-places-recover-others-don-t">Some places recover, others don't</h2>



Unfortunately, not every aspen stand has recovered yet. Some valleys still have many short, heavily browsed shoots, because it's not only elk eating them anymore. 



<a href="https://www.earth.com/news/yellowstones-iconic-bison-have-merged-into-a-single-herd/">Bison herds have grown</a>, and bison browse on aspen as well. They are strong enough to break young trees. 



"Increasing numbers of bison may be emerging as a new constraint to aspen in some areas," Painter confirmed.



Additionally, winter snow depth varies; droughts stress trees; bears and mountain lions also hunt elk; and hunting outside the park influences elk distribution. 



All of these factors interact, which is why some sites show strong recovery, others show moderate recovery, and a few have changed very little.



The key pattern is that places with many tall saplings experience little browsing, and aspen groves that remain popular eating grounds today stay short. 



This fact is the strongest indication that tree recovery is linked directly to wolf presence, not solely to weather or soil conditions.



<h2 class="wp-block-heading" id="h-proof-in-the-measurements">Proof in the measurements</h2>



Painter's team did not rely on casual observation. They used the same methods as earlier researchers, measuring the same plots. 



They counted recruitment - when young trees surpass browsing height and begin progressing toward maturity. This measure is crucial. Sprouts are insufficient if they never grow; without recruitment, the forest cannot replace itself.



The results are robust. After being stalled for most of a century, Yellowstone's aspens are increasing in height. In recovering stands today, you will see saplings - six, eight, or ten feet tall - that were not present in the 1990s.



<h2 class="wp-block-heading" id="h-the-future-of-yellowstone-s-aspens">The future of Yellowstone's aspens</h2>



"This is a remarkable case of <a href="https://www.earth.com/news/giant-viruses-found-in-yellowstones-hot-springs-may-be-near-the-root-of-all-life-on-earth/">ecological restoration</a>," Painter concluded. "Wolf reintroduction is yielding long-term ecological changes contributing to increased biodiversity and habitat diversity."



Trees grow slowly, so even with wolves restored, it will take decades for these young aspens to form a full-grown forest. 



Some areas might never fully recover if bison numbers continue to rise or if the climate becomes too hot and dry.



Thanks to the work of Painter and his team, scientists are now certain that restoring the Yellowstone predator has restarted aspen forest regeneration. Not everywhere and not perfectly, but enough to be measured, creating hope for the future.



The full study was published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0378112725004499?via%3Dihub" target="_blank" rel="noreferrer noopener">Forest Ecology and Management</a>.



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Yellowstone's aspen trees are growing again thanks to the reintroduction of wolves

Young aspen trees in Yellowstone are doing something they have not done in almost 100 years. Rather than sprouting and being eaten back to nubs by elk and bison, they're actually growing into tall, adult forest trees rising up towards the canopy. This matters more than it might seem, because it shows what happens when a missing piece of an ecosystem returns. Yellowstone, aspens, and elk In the 1920s, people eliminated wolves in Yellowstone. At the time, with limited scientific knowledge, managers believed it was the right...

Heatwaves are getting worse. That’s not new. But a less obvious reason for the rise in extreme heat, especially in cities, might be catching scientists and local governments off guard.



It turns out that a major driver of these heatwaves isn’t just greenhouse gases. It’s the steady decline of something we’ve spent decades trying to eliminate: <a href="https://www.earth.com/news/millions-of-people-die-from-air-pollution-each-year-yet-theres-still-a-lack-of-monitoring/">air pollution</a>.



<h2 class="wp-block-heading" id="h-smog-cuts-raise-urban-heat">Smog cuts raise urban heat</h2>



A new study from scientists at <a href="https://www.utexas.edu/">The University of Texas at Austin</a> shows that falling levels of aerosols - tiny particles that contribute to smog and haze - are playing a much bigger role in <a href="https://www.earth.com/news/extreme-heat-is-pushing-parts-of-earth-beyond-human-survival/">extreme heat</a> than previously thought. 



The researchers found that in populated areas, aerosols are up to 2.5 times more influential than greenhouse gases in driving changes in heatwave exposure.



While earlier research had connected aerosols to regional temperature patterns, this is the first study to look specifically at how those changes affect the number and intensity of heatwaves that people actually experience.



“Heatwaves near urban centers was much greater than we expected,” said study co-author Cameron Cummins. “So, as cities seek to curb their aerosol emissions to improve public health, they will also likely experience more heatwaves.”



<h2 class="wp-block-heading" id="h-cleaner-air-hotter-cities">Cleaner air, hotter cities</h2>



Using global climate models, the researchers analyzed aerosol trends from 1920 to the present. They found that in cities and other populated regions, higher levels of aerosols helped cut heatwave exposure by nearly half.



That’s because aerosols can reflect sunlight, essentially shielding certain areas from the full brunt of global warming. But here’s the catch: those protective aerosols are disappearing.



As countries around the world pass clean air regulations to improve health and <a href="https://www.earth.com/news/reducing-air-pollution-could-greatly-boost-carbon-sequestration-by-plants/">reduce pollution</a>, aerosol levels are dropping. This is good news for our lungs - but it also means the natural "shade" they provided is vanishing fast.



“Aerosols are really good at counteracting exposure [to heatwaves] right now, but that could rapidly change in the future,” said Geeta Persad, who led the study. 



“We seem to have already crossed a tipping point where declining aerosols are accelerating heatwave exposure in a lot of places.”



<h2 class="wp-block-heading" id="h-more-heatwaves-on-the-way">More heatwaves on the way</h2>



If aerosol emissions continue to decline at the current pace, the effects could be dramatic. The researchers project that by 2080, the average number of heatwave days globally could nearly triple - from about 40 days a year to 110.



Regions most likely to be affected include Sub-Saharan Africa, South Asia, South America, and Western Europe. 



In this study, a heatwave is defined as three or more consecutive days during a region’s warm season that exceed the 90th percentile for temperature. 



Sustained heat like this strains power grids, worsens health risks, and pushes infrastructure to its limits.



<h2 class="wp-block-heading" id="h-not-all-emissions-are-the-same">Not all emissions are the same</h2>



Aerosols and greenhouse gases often come from the same sources - such as burning fossil fuels - but they behave very differently. 



<a href="https://www.earth.com/news/greenhouse-gas-emissions-reach-another-all-time-high/">Greenhouse gases</a> trap heat, disperse globally, and can stay in the atmosphere for decades or even centuries. Aerosols, by contrast, have a short lifespan. They tend to stay localized and usually fall out of the air in a matter of weeks.



That short-term impact means we can see the effects of reduced aerosols quickly - which is good for health but risky for heat. Persad emphasized that this makes cities especially vulnerable as they clean up their air.



<h2 class="wp-block-heading" id="h-urban-heatwaves-surge-without-aerosols">Urban heatwaves surge without aerosols</h2>



Western Europe is a clear example. In the latter half of the 20th century, high aerosol levels helped shield the region from heatwaves, even as greenhouse gas concentrations climbed - but that’s changing.



The study showed that in just the next 25 years, reduced aerosols could lead to as many as 40 extra heatwave days per year in urban parts of Western Europe. Still, the researchers aren’t calling for a return to dirtier air. Far from it.



“The study results shouldn’t be taken as a license to pollute,” said Persad. High aerosol levels are dangerous. They contribute to respiratory and cardiovascular problems and cause thousands of premature deaths every year. 



“This work suggests that what happens with <a href="https://www.earth.com/news/aerosols-have-an-underestimated-effect-on-clouds-and-climate/">aerosols</a> in the near future is going to be really important for what happens with heat wave hazard and exposure and risk in the near future, the next 20 to 30 years.”



<h2 class="wp-block-heading" id="h-what-cities-can-do">What cities can do</h2>



The key takeaway? Cleaner air is non-negotiable, but it comes with trade-offs. As we cut pollution, cities need to be ready for more intense heat.



That means planning for infrastructure that can handle heatwaves, updating emergency response systems, expanding access to cooling centers, and rethinking urban design - all while continuing to fight climate change on a global scale.



Cleaner air is saving lives. But without better preparation, it could also mean hotter days ahead.



The full study was published in the journal <a href="https://iopscience.iop.org/article/10.1088/1748-9326/addee0">Environmental Research Letters</a>.



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Urban heatwaves are accelerating for a surprising reason

Heatwaves are getting worse. That’s not new. But a less...

Animals are constantly fighting over food, shelter, mates, or space. Most studies judge those clashes in the moment - by who won, who lost, and who got hurt. Two behavioral ecologists argue that this snapshot view misses the bigger evolutionary picture. 



To understand why, when, and how animals choose to fight or flee, the researchers say we have to track the long arc of costs and payoffs across an individual’s whole life. That includes how conflict shapes <a href="https://www.earth.com/news/scents-of-survival-how-plant-aromas-shape-insect-diets/">survival</a> and the number of offspring left behind.



The study, led by Paulo Enrique Cardoso Peixoto from the <a href="https://ufmg.br/international-visitors">Federal University of Minas Gerais</a> in Brazil, lays out a path for linking contest behavior to fitness.



“By linking individual contests to lifetime <a href="https://www.earth.com/news/reproductive-success-of-southern-white-rhinos-linked-to-gut-microbiome/">reproductive success</a>, we can understand how different contexts and environmental situations could favor the evolution of decision strategies in different species,” Peixoto said.



<h2 class="wp-block-heading" id="h-why-animals-fight-often">Why animals fight often</h2>



Displays, jousts, and all‑out fights occur across the animal kingdom. Sometimes they are ritualized shows of strength; sometimes they involve real blows, <a href="https://www.earth.com/news/mind-body-connection-wounds-heal-faster-if-we-think-more-time-has-passed/">wounds</a>, and death.



Even symbolic standoffs drain energy reserves. Because conflicts can bring both rewards and risks, natural selection should shape decision rules: when to escalate, when to back off, and when to never engage.



Value matters. A top‑tier resource - prime territory, a critical shelter site, or a receptive mate - might justify bigger risks. Lesser resources may not. The type of damage matters, too.



“If snapping <a href="https://www.earth.com/news/shrimp-crisis-alarming-virus-threatens-global-seafood-supplies/">shrimp</a> lose a claw during a fight, it can regrow, so it’s not a total loss because they can recover and fight subsequent contests,” Peixoto said. 



“If a beetle breaks a horn during a fight, it will not regrow, so that individual will be unable to fight again. Since they often fight for female access, this means they will be unable to reproduce anymore.”



A recoverable cost and an irreversible cost have very different consequences for lifetime breeding success.



<h2 class="wp-block-heading" id="h-gaps-in-animal-conflict-research">Gaps in animal conflict research</h2>



To see how biologists have been scoring these bouts, the authors reviewed 73 field and lab studies covering 62 species.



They tallied 24 types of contest cost and folded them into six broader themes. These included elevated metabolic expenditure, stress responses tied to weakened immunity, and risks like injury or death. 



Other costs were lost foraging time, reduced vigilance to predators, and cutbacks in parental care.



Different research traditions focus on different angles. Work on <a href="https://www.earth.com/news/new-invasive-crustacean-species-discovered-in-the-mediterranean/">crustaceans</a> and fishes often zeroes in on metabolism. Insect studies tend to document broken body parts. That patchwork makes cross‑species comparisons tough.



“There is huge variation in the measurements researchers take,” Peixoto said. Variation itself is fine; the trouble is that without some common yardsticks, we cannot ask whether, say, crabs and beetles pay similar average prices for fighting.



<h2 class="wp-block-heading" id="h-expanding-our-view-of-animal-conflict">Expanding our view of animal conflict </h2>



Short‑term metrics also dominate. Many experiments measure what happens minutes or hours after a contest and stop there. 



Yet the most meaningful cost might unfold weeks later if an injured animal skips a breeding season, or years later if <a href="https://www.earth.com/news/chronic-stress-disrupts-gut-bacteria-and-fuels-cancer-progression/">chronic stress</a> cuts lifespan.



So what should come next? “We need to link the average cost in a single contest to the individual’s longevity or lifetime reproductive success,” Peixoto said.



“For example, are there contexts that favor individuals that always fight and are more aggressive, and other situations that favor more cautious individuals that only fight weaker rivals to increase their chances of winning?”



The answer likely differs by species, habitat, and the reliability of signals about opponent strength.



<h2 class="wp-block-heading" id="h-tracking-fights-across-lifetimes">Tracking fights across lifetimes</h2>



The researchers propose starting by identifying the cost that matters most for the focal species - irreparable injury, energy drain, or lost breeding time. 



Next, measure how that cost accumulates within a contest relative to baseline. Finally, scale up: track how often individuals engage in fights over a lifetime and tally their reproductive output.



“By knowing the average number of fights that different individuals are involved in and their lifespans, we can estimate whether individuals who fight more or less have better lifetime reproductive success,” Peixoto said.



“This connection would allow us to gain deeper insights into the evolutionary dynamics of animal contests and the trade-offs individuals face.”



<h2 class="wp-block-heading" id="h-broader-implications-of-the-research">Broader implications of the research </h2>



Wildlife managers, conservation biologists, and evolutionary theorists all stand to benefit from a better understanding of animal conflict. 



If escalating human disturbance changes how often animals must fight for <a href="https://www.earth.com/news/rising-heat-shrinking-habitats-insects-face-hidden-threats/">shrinking resources</a>, the lifetime toll could ripple through populations.



Standardizing how we track contest costs - and extending those measures over years - will reveal when aggression pays and when it backfires. It will also show how natural selection calibrates the will to fight across the tree of life.



The study is published in the journal <a href="https://linkinghub.elsevier.com/retrieve/pii/S0169534725001533">Trends in Ecology &amp; Evolution</a>.



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Wild animal fights can harm a species for generations

Animals are constantly fighting over food, shelter, mates, or space. Most...

Astronomers caught a star system at the moment when solid grains began to form planets. This snapshot reveals how planets first start to form, just as Earth once did.



The infant star HOPS-315 sits about 1,300 light-years, roughly 7.6 quadrillion miles, away in the constellation Orion. Around it whirls a disc of gas and dust where heat is high enough to bake rock yet cool enough for those rocks to <a href="https://www.earth.com/news/how-do-giant-planets-form/">re-form</a>.



<a href="https://www.universiteitleiden.nl/en/staffmembers/melissa-mcclure#tab-1" target="_blank" rel="noreferrer noopener">Melissa McClure</a> of Leiden University led the international team that pieced together these first moments of planetary assembly. Their finding gives researchers a live laboratory that mirrors the opening chapter of the Solar System’s own story.



<h2 class="wp-block-heading" id="h-how-planets-form-from-early-solids">How planets form from early solids</h2>



In primitive meteorites, tiny calcium-aluminum-rich inclusions tell us that the Solar System’s clock started ticking <a href="https://www.science.org/doi/10.1126/science.1226919" target="_blank" rel="noreferrer noopener">4.567 billion</a> years ago. Those inclusions condensed from a searing vapor and seeded every terrestrial planet we know.



Because the clock starts with condensation, catching that step beyond the Sun has been an astronomer’s white whale. 



The new observation marks the first time any telescope has seen <a href="https://pubs.rsc.org/en/content/articlelanding/2022/cp/d2cp02188a" target="_blank" rel="noreferrer noopener">gas-phase silicon monoxide</a> (SiO) alongside freshly crystallizing silicates in the same patch of a <a href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/protoplanetary-disk" target="_blank" rel="noreferrer noopener">protoplanetary disc</a>.



McClure’s team spotted the minerals within an orbit comparable to our asteroid belt. That match matters, for it pins early <a href="https://www.earth.com/news/how-planets-form-its-much-more-complicated-than-we-thought/">chemistry</a> to a region that later fed Earth with water and metals.



<h2 class="wp-block-heading" id="h-crystals-forming-around-hops-315">Crystals forming around HOPS-315</h2>



The James Webb Space Telescope (<a href="https://science.nasa.gov/mission/webb/" target="_blank" rel="noreferrer noopener">JWST</a>) collects infrared light that pierces the dust cocoon shrouding HOPS-315, revealing the distinct fingerprint of hot SiO molecules. Those molecules glow at about 2,200°F, a temperature that vaporizes most common rocks.



<a href="https://www.almaobservatory.org/en/home/" target="_blank" rel="noreferrer noopener">ALMA</a>, the Atacama Large Millimeter/submillimeter Array, then measured the same region at millimeter wavelengths and mapped where the glow comes from. 



By combining the two views, scientists confirmed that both gas and solid forms of silicon occupy a ring no farther than 2 astronomical units from the star.



Handling these observations is tricky because HOPS-315 also drives a jet rich in SiO. The team disentangled the jet’s signal from the disc’s by checking velocities, the jet gas races outward, whereas disc material <a href="https://www.earth.com/news/july-2025-skywatching-bright-planets-and-a-summer-constellation/">orbits</a> sedately.



A final check involved comparing the brightness of different SiO lines. The ratio matched laboratory predictions for vapor that is actively condensing, adding yet another layer of confidence to the result.



<h2 class="wp-block-heading" id="h-planets-forming-from-gas-and-crystals">Planets forming from gas and crystals</h2>



Crystalline silicates appear where cooling vapor meets a sharp fall in temperature. The presence of both phases at one location means condensation is happening right now, not long ago nor far away in another part of the disc.



“This process has never been seen before in a protoplanetary disc, or anywhere outside our Solar System,” said <a href="https://lsa.umich.edu/astro/people/core-faculty/ebergin.html" target="_blank" rel="noreferrer noopener">Edwin Bergin</a> of the <a href="https://lsa.umich.edu/astro" target="_blank" rel="noreferrer noopener">University of Michigan</a>, a co-author on the study. 



He adds that the minerals are the same kind locked inside 4.5-billion-year-old meteorites on Earth’s shelves.



<figure class="wp-block-image aligncenter size-full"><a href="https://cdn.eso.org/images/wallpaper5/eso2512a.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/07/solar-system-forming_HOPS-315_ESO_1s.webp" alt="This is HOPS-315, a baby star where astronomers have observed evidence for the earliest stages of planet formation. Together with data from the James Webb Space Telescope (JWST), these observations show that hot minerals are beginning to solidify. In orange we see the distribution of carbon monoxide, blowing away from the star in a butterfly-shaped wind. In blue we see a narrow jet of silicon monoxide, also beaming away from the star. These gaseous winds and jets are common around baby stars like HOPS-315. Credit: ALMA(ESO/NAOJ/NRAO)/M. McClure et al." class="wp-image-1978595"/></a><figcaption class="wp-element-caption">This is HOPS-315, a baby star where astronomers have observed evidence for the earliest stages of planet formation. Together with data from the James Webb Space Telescope (JWST), these observations show that hot minerals are beginning to solidify. In orange we see the distribution of carbon monoxide, blowing away from the star in a butterfly-shaped wind. In blue we see a narrow jet of silicon monoxide, also beaming away from the star. These gaseous winds and jets are common around baby stars like HOPS-315. Click image to enlarge. Credit: ALMA(ESO/NAOJ/NRAO)/M. McClure et al.</figcaption></figure>



“We’re really seeing these minerals at the same location in this extrasolar system as where we see them in asteroids in the Solar System,” said co-author, Logan Francis from the Advanced Functional Fabrics of America (<a href="https://affoa.org/" target="_blank" rel="noreferrer noopener">AFFOA</a>). 



He notes that the condensation zone sits at almost the same orbital radius as our <a href="https://www.earth.com/news/asteroids-found-in-the-main-belt-are-the-smallest-ever-detected/">asteroid belt</a>. 



The mineral grains measure less than a micrometer across, yet they mark the first step toward kilometer-scale planetesimals. Electrostatic forces will make them clump for thousands of years until <a href="https://www.earth.com/news/astronomers-announce-evidence-suggesting-that-our-solar-system-has-nine-planets-again/">gravity</a> takes over.



<h2 class="wp-block-heading" id="h-hops-315-mirrors-earth-s-origins">HOPS-315 mirrors Earth’s origins</h2>



Laboratory studies show that minerals rich in silicon and oxygen condense first, followed quickly by iron-nickel alloys and then more volatile compounds. 



Seeing hot SiO vapor around HOPS-315 hints that a similar chemical parade is marching there.



By estimating the star’s luminosity and the disc’s temperature gradient, McClure’s group concludes that crystalline silicates could mass about a tenth of the Moon. That is plenty to seed multiple rocky planets if subsequent growth is efficient, as models suggest.



Isotopic <a href="https://arxiv.org/abs/1708.02631" target="_blank" rel="noreferrer noopener">work</a> on chondrules indicates that the earliest building blocks in our own <a href="https://www.earth.com/news/jupiters-past-how-the-young-gas-giant-shaped-our-solar-system/">Solar System</a> formed within the first million years, a timescale now testable in real time with HOPS-315.



Matching astronomical data to isotope chronometers promises a much sharper picture of planet formation than meteoritic studies alone.



The discovery may also shed light on why Earth contains less carbon than nebular models predict. If early minerals trap oxygen and silicon immediately, carbon may remain gaseous longer and get pushed outward before it can join newborn worlds.



<h2 class="wp-block-heading" id="h-what-s-next-in-watching-planets-form">What’s next in watching planets form</h2>



Over the next year, ALMA will return to HOPS-315 to look for water ice farther out in the disc. 



If water lines up beyond the silicate ring, astronomers can test whether rocky seeds migrate inward before they acquire ice mantles, a step that may explain why Earth ended up with oceans.



JWST will track how the SiO signature evolves. A steady decline would show vapor freezing out, whereas a surge could hint at heating bursts from magnetic flares or spiral shocks.



<figure class="wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://youtu.be/0j-MH6_QlBA?si=3P8FgBE0O2TTWsnM
</div><figcaption class="wp-element-caption">Witnessing the dawn of a new solar system. Credit: ESO</figcaption></figure>



Beyond the specifics of HOPS-315, the result boosts confidence that rocky planets are common. If condensation begins so early, many stars may launch planet formation well before their gas discs disperse, leaving time for worlds to migrate, collide, and settle into stable orbits.



Astronomer Elizabeth Humphreys at ESO, who was not involved in the study, said she was “really impressed” that the team could pinpoint the first solids. 



She argues that the synergy of Webb and ALMA is revealing a Universe “in which the steps toward life-bearing planets start earlier than we dared hope.”



The study is published in <a href="https://www.nature.com/articles/s41586-025-09163-z" target="_blank" rel="noreferrer noopener">Nature</a>.



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Astronomers capture the birth of a new solar system for the first time ever

Astronomers caught a star system at the moment when solid...

Antimicrobial resistance now kills at least 1.27 million people a year and is linked to almost five million deaths, making common infections progressively harder to treat. Meanwhile, the pipeline for new <a href="https://www.earth.com/news/genes-for-antibiotic-resistance-lurk-in-our-wastewater-and-streams/">antibiotics</a> has slowed, but animal venom offers new hope amid fears of a post‑antibiotic era.



Using deep-learning tools, researchers mined 40 million venom‑encoded peptides collected from snakes, scorpions, spiders, and other animals. They pinpointed 386 molecules with the hallmarks of powerful antibiotics.



The work was led by César de la Fuente at the <a href="https://www.upenn.edu/" target="_blank" rel="noreferrer noopener">University of Pennsylvania</a>, who specializes in machine biology and antibiotic discovery.



<h2 class="wp-block-heading" id="h-old-toxins-new-treatments">Old toxins, new treatments</h2>



Decades ago, a peptide from the Brazilian pit viper inspired captopril, the first ACE inhibitor for hypertension, proving that toxins can be tamed for therapy. 



More recently, FDA‑approved <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6214764/" target="_blank" rel="noreferrer noopener">ziconotide</a>, derived from cone snail venom, has provided severe pain relief without opioids.



Those successes hint at a vast pharmacological trove hidden in venoms, yet only a fraction of the peptides they contain have been examined. 



Digital screening can accelerate that search beyond what manual experiments allow.



<h2 class="wp-block-heading" id="h-venom-holds-rare-chemistry">Venom holds rare chemistry</h2>



Venomous animals have evolved specialized chemistries for offense or defense over millions of years. These chemistries generate peptides that slice into nervous systems, coagulation pathways, and bacterial membranes.



Because each species fine‑tunes its arsenal, the combined library covers many <a href="https://www.earth.com/news/antibiotic-resistance-could-cause-a-health-crisis-globally/">chemical</a> shapes rarely found in conventional drug collections.



The Penn team compiled proteins from four databases, representing cone snails, spiders, snakes, scorpions, and more. This diversity fed the AI with sequences spanning more than 16,000 proteins. 



The model then shredded these sequences into over 40 million candidate peptides.



<h2 class="wp-block-heading" id="h-antibiotic-candidates-found-in-venom">Antibiotic candidates found in venom</h2>



APEX turns each animal venom peptide’s sequence into numbers that reflect traits like charge and water-repellence. Then, it predicts how much of each peptide is needed to stop the growth of 34 different bacterial strains.



Sequences predicted to inhibit growth at 32 micromoles per liter or less advanced to a similarity filter that weeded out peptides too close to known antibiotics.



The filter left 386 candidates that occupied unexplored corners of peptide sequence space. This ensured any hits would add new chemical diversity. Crucially, the whole triage ran in a few hours on standard graphics‑processing hardware, a pace impossible for wet‑lab screening.



“Venoms are evolutionary masterpieces, yet their <a href="https://www.earth.com/news/antimicrobial-resistance-projected-to-kill-10-million-people-each-year/">antimicrobial</a> potential has barely been explored,” said César de la Fuente. His lab’s strategy turns that evolutionary advantage into a search engine for urgently needed drugs.



The platform also found over 2,000 new short sequence patterns that help break bacterial membranes -useful building blocks for future antibiotics.



<h2 class="wp-block-heading" id="h-peptides-killed-drug-resistant-bugs">Peptides killed drug-resistant bugs</h2>



The researchers synthesized 58 of the AI‑ranked peptides and challenged them against drug‑resistant strains of <a href="https://www.cdc.gov/ecoli/about/index.html" target="_blank" rel="noreferrer noopener">Escherichia coli</a> and <a href="https://www.cdc.gov/staphylococcus-aureus/about/index.html" target="_blank" rel="noreferrer noopener">Staphylococcus aureus</a>; 53 wiped out the bacteria at doses that left human red blood cells unharmed.



“By pairing computational triage with traditional lab experimentation, we delivered one of the most comprehensive investigations of venom‑derived antibiotics to date,” said Marcelo Torres, a research associate at Penn. 



Torres noted that the most potent peptides came from spiders, mirroring the predators’ need to immobilize prey quickly.



One standout candidate knocked down <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3442836/" target="_blank" rel="noreferrer noopener">Acinetobacter baumannii</a> infections in mice by up to 99 percent after a single topical dose. The animals showed no weight loss or other toxicity signs, an early but encouraging safety signal.



<h2 class="wp-block-heading" id="h-venom-bypasses-resistance-paths">Venom bypasses resistance paths</h2>



Most classic antibiotics block <a href="https://www.earth.com/news/new-enzyme-developed-to-recycle-plastic/">enzymes</a>, so single genetic tweaks can disarm them, but venom peptides that destabilize bacterial membranes face fewer resistance routes.



Animal venom hits carried strong positive charges and balanced hydrophobic residues, a combination that latches onto the negatively charged bacterial surface and punches holes in it.



Fluorescence assays confirmed that 26 peptides swiftly collapsed the cytoplasmic membrane potential in Pseudomonas aeruginosa.



Outer membrane permeabilization played a smaller role, suggesting depolarization is their primary kill step.



This mechanism works like human defensins but uses new sequences that bacteria haven’t seen, making resistance unlikely - and because human cells have cholesterol and a neutral charge, they aren’t harmed in the same way.



<h2 class="wp-block-heading" id="h-venom-worked-without-harming-cells">Venom worked without harming cells</h2>



Testing in human kidney cells found that most scorpion and cone snail peptides were benign at concentrations far above their antibacterial doses. 



A handful of spider peptides showed cytotoxicity, guiding the team to prioritize safer scaffolds.



In the mouse skin‑infection model, the lead spider peptide cut bacterial counts by roughly three orders of magnitude without harming the animals.



Pharmacokinetic tweaks such as end‑capping or non‑natural amino acids could further prolong its activity and reduce dosing frequency.



Computational screens suggest 40 percent of candidates likely avoid <a href="https://www.earth.com/news/potassium-depletion-in-agricultural-soils-threatens-food-security/">potassium</a> channels, a common off-target for cationic peptides. Electrophysiology studies now under way will test that prediction before systemic trials begin.



<h2 class="wp-block-heading" id="h-what-s-next-for-venom-based-antibiotics">What’s next for venom-based antibiotics</h2>



Medicinal chemists are refining the top animal venom hits to sharpen selectivity, resist protease degradation and improve serum half‑life. 



Machine‑learning feedback loops will retrain APEX with every new data point, steadily raising prediction accuracy.



Regulatory hurdles remain, yet the researchers argue that topical use in skin or burn infections could reach patients faster than systemic applications. 



Researchers can also pair peptide antibiotics with existing drugs to delay resistance evolution.



The goal is a pipeline where venom data trains artificial intelligence, AI guides chemistry, and chemistry delivers antibiotics in months. If realized, that loop could turn the tide in the struggle against superbugs.



The study is published in <a href="https://pubmed.ncbi.nlm.nih.gov/40645962/" target="_blank" rel="noreferrer noopener">Nature Communications</a>.



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AI found a way to turn venom into antibiotics

Antimicrobial resistance now kills at least 1.27 million people a...

A flexible membrane stretched between elongated fingers allows bats to maneuver through the night with extraordinary agility. 



New research comparing bat and mouse embryos shows that the bat wing didn't come from a brand-new cell type.



Instead, it formed by reusing the same genetic programs found in all mammalian limbs - but activated at a different time and place during development.



<h2 class="wp-block-heading" id="h-from-hands-to-fins-to-wings">From hands to fins to wings</h2>



“We chose bats because they are an excellent example of phenotypic adaptation," said co-author Stefan Mundlos, a researcher at the <a href="https://www.molgen.mpg.de/en">Max Planck Institute for Molecular Genetics</a>. "The limbs are a beautiful model system to see how evolution produces different forms and functions,” 



“Think of the limbs of a horse or the fins of a <a href="https://www.earth.com/news/how-dolphin-brains-evolved-to-see-underwater-by-using-sound-echolocation/">dolphin</a>, or our hands or a wing. These are prime examples of how evolution takes one form and turns it into something completely different.”



At roughly 1,400 species, bats constitute the second‑most diverse order of mammals after <a href="https://www.earth.com/news/the-modern-day-plague-rodents-fleas-and-their-impact-on-wildlife/">rodents</a>, colonizing every continent except Antarctica and the driest deserts.



<h2 class="wp-block-heading" id="h-bat-wings-form-from-familiar-cells">Bat wings form from familiar cells</h2>



In their new work, Mundlos and colleagues collected embryos at the critical stage when a bat’s forelimb begins to diverge from a <a href="https://www.earth.com/news/mice-actually-listen-to-their-whiskers-touching-things/">mouse</a>’s into a flight organ.



Using whole‑genome sequencing and single‑cell RNA sequencing, the team catalogued gene activity in thousands of individual cells from both the anterior limb bud (future wing) and posterior limb bud (future leg) in bats and mice.



The project united laboratories at the Max Planck Institute for Molecular Genetics, the <a href="https://www.mdc-berlin.de/">Max Delbrück Center in Berlin</a>, and <a href="https://www.cabd.es/en/">Centro Andaluz de Biología del Desarrollo in Seville</a>.



Single‑cell technology provides a high‑resolution snapshot of which <a href="https://www.earth.com/news/bat-genes-are-crucial-in-the-fight-against-cancer/">genes</a> are active in each cell as tissue forms. 



Comparing species, however, is notoriously challenging, especially for non‑model organisms such as bats.



<h2 class="wp-block-heading" id="h-evolution-reused-cells">Evolution reused cells</h2>



“One of the biggest surprises for us was that all cell types and functions in the limb appear to be conserved between species,” said senior author Francisca M. Real, an expert in development and disease at Max Planck.



“Initially, we thought that this technology and analysis would provide clear insights into some bat‑unique cells forming the wings, since wings and mouse limbs are very different from each other.”



Instead, every cell type in a bat limb found its counterpart in a mouse limb; what differed was when and where particular genes turned on.



<h2 class="wp-block-heading" id="h-later-gene-use-drives-flight">Later gene use drives flight</h2>



The chiropatagium - the delicate skin membrane spanning digits II through V - forms later in bat development.



The team showed that the cells building this membrane resemble proximal limb‑bud cells found in all mammals, but bats reactivate their gene program farther out along the growing limb and at a later stage.



The same genetic toolkit, deployed on a different schedule, yields an entirely new wing surface without creating new cells.



“The cells present in the proximal part of the limb are similar in identity to the cells that later form the wing,” said lead author Christian Feregrino. "This reflects how evolution works."



<h2 class="wp-block-heading" id="h-bat-wings-echo-human-hands">Bat wings echo human hands</h2>



Because bat wings share the underlying bone layout of a human hand, they illustrate how modest tweaks in developmental timing - sometimes called heterochrony - can transform a limb into something entirely new.



The same principle likely shaped the stiff forelimbs of horses, the broad flippers of dolphins, and the dexterous hands that humans use to write, cook, and build.



By mapping the exact genetic switches that shift limb programs along both the spatial and temporal axes, scientists hope to uncover general rules that govern morphological innovation across the tree of life.



<h2 class="wp-block-heading" id="h-bat-wings-built-by-timing">Bat wings built by timing</h2>



The study also provides an annotated catalog of bat limb cell states and regulatory elements. 



This opens the door to identifying enhancers - non-coding DNA sequences that act like genetic dimmer switches - responsible for delayed, distal activation.



Identifying those elements could show whether similar regulatory changes exist in other animals that evolved gliding or flight membranes, like flying squirrels or sugar gliders. 



It could also help scientists better understand congenital limb malformations in humans.



<h2 class="wp-block-heading" id="h-evolution-made-flight-with-old-tools">Evolution made flight with old tools</h2>



Bats rose to the skies not by inventing entirely new genes but by choreographing familiar ones in new ways.



Their wings demonstrate nature’s talent for editing an existing blueprint into fresh structures, underscoring Darwin’s insight that evolution works with what is already there.



As single‑cell technologies and comparative genomics mature, more secrets of evolutionary ingenuity are likely to emerge from the membranes that beat silently above our heads each night.



The study is published in the journal <a href="https://www.nature.com/articles/s41559-025-02780-x">Nature Ecology &amp; Evolution</a>.



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Bats once had hands - but evolution turned them into wings

A flexible membrane stretched between elongated fingers allows bats to...

In nature’s endless game of survival and attraction, appearances can deceive. A soft flutter of wings might signal prey, a wasp, or danger. A bright color could warn of poison or invite a mate. But in one curious case, a dancing jumping spider has taken deception to a whole new level.



Jumping spiders are not what people typically imagine when they think of showy, dramatic displays. Yet one species, the Maratus vespa, does something few creatures dare. This jumping spider imitates one of its biggest threats - a wasp.



This surprising performance raised a question that scientists at the University of Cincinnati couldn’t ignore: why would a <a href="https://www.earth.com/news/all-legs-no-guts-sea-spider-genome-stuns-scientists/">spider</a> mimic a predator during something as important as courtship?



That question led to an experiment unlike most in behavioral biology. And the journey from simple curiosity to machine-aided discovery unveiled a strange and brilliant piece of evolutionary theater.



<h2 class="wp-block-heading" id="h-jumping-spiders-in-a-wasp-disguise">Jumping spiders in a wasp disguise</h2>



With travel restrictions in place during the COVID-19 pandemic, fieldwork came to a halt. But curiosity did not. Biologists at the <a href="https://www.uc.edu" target="_blank" rel="noreferrer noopener">University of Cincinnati</a> turned to computers, hoping to uncover the secrets behind the spider’s dramatic disguise.



Humans often see faces where none exist, on rocks, in tree bark, even in cloud formations. Scientists wondered if the spider’s “wasp face” was a real mimicry or simply a trick of human perception. 



To answer this question, the researchers needed a third party without such bias. They used computer vision techniques and machine learning. 



Neural networks were trained to identify and classify images of different insect and spider species based on patterns and shapes. The test included 62 species, from jumping spiders to flies and wasps.



<h2 class="wp-block-heading" id="h-wasp-like-spiders-trick-algorithm">Wasp-like spiders trick algorithm</h2>



The results surprised the researchers. The artificial intelligence made classification errors nearly 12 percent of the time across all species. Thirteen species were identified correctly every single time. But others were harder to pin down.



“The original idea was inspired by one species, a peacock jumping spider called Maratus vespa, which is Latin for wasp,” said UC student and study lead author Olivia Harris.



In the case of Maratus vespa and a few other <a href="https://www.earth.com/news/spiders-adapt-their-webs-to-filter-out-human-made-noise/">spiders,</a> the AI struggled more than usual. It misidentified these spiders as wasps more than 20 percent of the time. Even without human bias, the computer saw what looked like a wasp.



This revealed something important. The spider's mimicry may be strong enough to fool not just people but machines as well. If artificial intelligence gets confused, real predators might too.



<h2 class="wp-block-heading" id="h-spider-s-dance-looks-like-a-wasp">Spider’s dance looks like a wasp</h2>



Maratus vespa is no ordinary spider. During courtship, it performs an elaborate dance. It raises its abdomen to display bright, bold patterns. The colors echo those of a wasp’s body. But it doesn’t stop there.



This jumping spider also raises side flaps on its body. The added shape creates the outline of a wasp’s triangular face. 



The mimicry becomes more convincing with movement, colors, and structure. And this illusion, oddly enough, is used in one of the most vulnerable moments of its life, mating.



“That got us thinking,” Harris said. “Why would a spider want to look like a wasp, which is a predator of spiders, especially as a primary element of its courtship display?" The answer lies in attention, survival, and split-second timing.



<h2 class="wp-block-heading" id="h-male-jumping-spiders-seeking-attention">Male jumping spiders seeking attention</h2>



Jumping spiders are highly visual animals. They have multiple sets of eyes, each with different abilities. Females especially are careful observers. 



When they detect movement from afar, particularly something that resembles a predator, they freeze and focus.



It turns out, this reaction might give males a critical opening. If the female thinks a wasp is nearby, she becomes alert but still. That moment of pause may allow the male spider to begin his courtship display.



The study’s authors believe the male uses this mimicry as a tactic. It isn’t to scare her, but to capture her attention and hold it long enough to start the dance.



<h2 class="wp-block-heading" id="h-spiders-aren-t-the-only-tricksters">Spiders aren't the only tricksters</h2>



Nature is full of strange strategies when it comes to attracting mates. Some male<a href="https://www.earth.com/news/moths-read-the-stars-to-complete-an-epic-migration/"> moths</a>, for example, imitate the ultrasonic calls of bats. This discourages females from flying away. 



In Africa, topi antelope bulls pretend to spot predators to stop females from leaving their territory.



“But this is the only case we’ve found of males mimicking a predator visually,” she said.



Visual mimicry as a courtship trick remains extremely rare. That makes the Maratus vespa spider an unusual and fascinating example. 



The study suggests this behavior represents a form of sensory exploitation. The male takes advantage of how the female processes visual information.



<h2 class="wp-block-heading" id="h-the-limits-of-illusion">The limits of illusion</h2>



Professor Nathan Morehouse, who co-authored the study, explained that the <a href="https://www.earth.com/news/shiny-animals-outwit-predators-with-optical-illusions/">illusion</a> works best from a distance or from the female’s side view.



These angles rely on her peripheral vision, which sees only in green. At that range, the bright pattern and angular shape suggest danger. But when the male moves closer, the illusion wears off.



“Females will not be fooled forever. If they were, they would be robbed of the ability to make mate choices, which would put the species at a long-term disadvantage,” Morehouse said. “It’s beneficial for the males to break the illusion.”



In other words, the mimicry is a tool to get noticed, not to deceive permanently. The female must still decide if the male is worthy. And once she’s focused, she uses her color-sensitive front eyes to make that decision.



<h2 class="wp-block-heading" id="h-jumping-spiders-posing-as-wasps">Jumping spiders posing as wasps</h2>



The team now hopes to follow up with <a href="https://www.earth.com/news/science-behind-predicting-and-changing-human-behavior/">behavioral studies</a>. They want to test if live female spiders behave differently based on the strength of the male’s visual mimicry.



Do some jumping spiders copy wasps better than others? Do females prefer males with more convincing patterns? And can these differences affect which males succeed in passing on their genes?



These questions may reveal even more about how animals use deception not just for survival, but for love.



In the meantime, Maratus vespa continues to dance its strange, bright, and possibly risky dance in the wilds of Australia. A spider pretending to be its enemy, all in the name of romance.



The study is published in the journal <a href="https://academic.oup.com/beheco/article-abstract/36/4/araf074/8203202?redirectedFrom=fulltext&amp;login=false" target="_blank" rel="noreferrer noopener">Behavioral Ecology</a>.



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Why jumping spiders mimic wasps during mating dances

In nature’s endless game of survival and attraction, appearances can...

Life feels smaller when friends are far away. Now scientists have measured just how literally the brain itself can shrink due to social isolation when people spend a year cut off from the wider world.



Their new work follows 25 volunteers who “wintered over” at Concordia Station, an Antarctic outpost 685 miles from the nearest coast, enduring months of darkness and a chronic lack of rescue options. 



The findings come from Dr. Mathias Basner and Dr. David R. Roalf of the University of Pennsylvania <a href="https://www.med.upenn.edu/">Perelman School of Medicine</a>.



<h2 class="wp-block-heading" id="h-antarctica-simulates-space-like-isolation">Antarctica simulates space-like isolation</h2>



Few spots on Earth mimic the deep <a href="https://www.earth.com/news/loneliness-harms-health-more-than-alcohol-obesity-or-smoking/">isolation</a> astronauts will face on future Mars missions, yet Concordia comes close. Its altitude feels like 13,000 feet to the body, air temperatures plunge well below -70°F, and the Sun disappears for weeks. 



Those stressors force crews to rely solely on one another, providing a rare, ethically acceptable model for studying chronic social separation.



Earlier Antarctic MRI work hinted that solitude can sap regions linked to memory and navigation, but sample sizes were tiny and scans happened long after crews returned. 



Basner’s team scanned participants before they left Europe, within 16 days of touchdown back home, and again five months later, capturing changes while they were still fresh.



The volunteers served as their own controls, and four “flying phantom” participants were scanned at every site to align machines. A matched group in Germany, who never left home, offered a reality check against normal aging.



<h2 class="wp-block-heading" id="h-isolation-causes-brain-shrinkage">Isolation causes brain shrinkage</h2>



High‑resolution MRI revealed that total <a href="https://www.earth.com/news/childhood-experiences-trigger-lasting-changes-in-brain-structure/">gray matter</a> fell in the temporal and parietal lobes as well as in deep structures such as the hippocampus, pallidum, and thalamus. 



Ventricular spaces holding cerebrospinal fluid expanded at the same time, suggesting tissue gave way to fluid. Virtually all of those losses reversed after five months except in the thalamus, a hub for sensory relay.



Parietal lobe volume dropped about 0.4 standard deviations immediately post‑mission, while lateral ventricles swelled by a similar margin.



Control participants showed no such pattern, implying that cold, confinement, and social deprivation, not calendar time, drove the shift.



While discussing Mars travel earlier this year, Basner warned that “something quite bad is happening in the brain” during lengthy expeditions. 



<h2 class="wp-block-heading" id="h-good-sleep-and-exercise-protect-brain">Good sleep and exercise protect brain</h2>



Sleep logs and wrist‑worn actigraphs painted a clear picture: crew members who slept longer and more efficiently lost less gray matter in the temporal cortex and hippocampus. 



Laboratory <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10281670/" target="_blank" rel="noreferrer noopener">studies</a> back the idea, linking deep sleep to the glymphatic system that clears metabolic waste and guards neurons.



Gym visits mattered, too. Time spent lifting weights or cycling correlated with healthier <a href="https://www.earth.com/news/sitting-for-hours-daily-shrinks-your-brain-even-if-you-exercise/">brain volumes</a>, echoing decades of research on exercise‑induced neurogenesis. 



Thus, the polar crew’s cramped fitness room served not just morale but measurable neuroprotection.



<h2 class="wp-block-heading" id="h-isolation-harms-the-brain">Isolation harms the brain </h2>



Antarctica may seem far from daily life, yet social isolation is rising worldwide and carries similar neurological fingerprints. 



A Neurology <a href="https://www.neurology.org/doi/10.1212/WNL.0000000000207602" target="_blank" rel="noreferrer noopener">study</a> of 8,896 Japanese seniors found that those with the least contact had total brain volumes 0.5 percent lower than their most connected peers and smaller hippocampus and amygdala volumes.



Systematic reviews tie chronic loneliness to thinning of anterior hippocampal tissue, reduced cortical thickness, and weaker white‑matter efficiency. 



These civilian data reinforce the Antarctic results: whether you are on a frozen plateau or an urban block, prolonged disconnection chips away at brain real estate involved in memory, mood, and orientation.



Animal work supports the link. Rodents housed alone show dendritic pruning in hippocampal neurons, mirroring the human MRI findings.



<h2 class="wp-block-heading" id="h-what-it-means-for-future-space-travel">What it means for future space travel</h2>



NASA and ESA advisors now rank safeguarding brain health among the top 14 research goals before any multiyear mission beyond low Earth orbit. In microgravity, fluid shifts already enlarge ventricles and raise intracranial pressure, adding social <a href="https://www.earth.com/news/social-isolation-and-loneliness-trigger-changes-in-blood-proteins/">isolation</a> could amplify risk.



Countermeasures under study include structured exercise, regulated light cycles that protect sleep, and virtual reality visits with family. 



The Concordia data hint that such steps are not optional extras but necessities if crews are to think clearly by the time they reach Mars.



<h2 class="wp-block-heading" id="h-isolation-as-a-brain-health-issue">Isolation as a brain health issue</h2>



For public health officials, the Antarctic story demonstrates the need to treat loneliness as a biological threat, not just an emotional one. 



Simple interventions, encouraging community ties, securing access to green spaces, prescribing exercise with social components, might slow neural wear.



Meanwhile, Basner and Roalf plan to track a new Concordia cohort using portable low‑field scanners, hoping to capture changes in real time. Broader samples, including more women and older adults, will test how universal the brain‑shrink response really is.



Policy makers could also draw lessons about elder‑care design. Housing that fosters hallway chats or communal meals might buffer the brain much like gym sessions did for the polar explorers. 



Regions with <a href="https://www.earth.com/news/aging-populations-have-less-cohesive-social-networks/">aging populations</a> may see cognitive dividends from investments that fight isolation.



Finally, ordinary readers can take a cue from the ice: protect your sleep, keep moving, and stay socially engaged. The brain, it seems, is as hungry for company as it is for oxygen.



The study is published in the journal <a href="https://www.nature.com/articles/s41526-025-00497-6" target="_blank" rel="noreferrer noopener">npj Microgravity</a>.



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Long periods of social isolation can physically shrink the brain

Life feels smaller when friends are far away. Now scientists...

Many people trust dogs' instincts when it comes to another person's character. When a dog greets someone warmly, it’s seen as a good sign - but when a dog keeps its distance, this can cause suspicion. Still, the question remains: do dogs actually evaluate humans?



Scientists have long explored whether animals, especially <a href="https://www.earth.com/news/national-puppy-day-2025-where-happiness-meets-responsibility/">dogs</a>, can socially judge humans. Previous studies showed mixed results, and the newest research deepens the mystery.



<h2 class="wp-block-heading" id="h-why-dogs-might-judge-people">Why dogs might judge people</h2>



Reputation in <a href="https://www.earth.com/news/dogs-suffer-from-the-january-blues-just-like-humans/">animals</a> means recognizing others based on past behavior. Some animals learn through direct experience. Others can eavesdrop and learn by watching others. This ability, called third-party evaluation, can help animals choose helpful social partners.



Dogs, as domesticated companions, seemed like strong candidates for such skills. They were bred to work with humans. So, researchers expected them to notice human behavior differences - but the data doesn't always agree.



<h2 class="wp-block-heading" id="h-how-the-study-was-designed">How the study was designed</h2>



Researchers tested 40 pet dogs of various ages. Dogs either watched two humans interact with another dog, or interacted directly with the humans themselves. One person was generous, offering food, while the other withheld it.



Dogs were split into age groups - young, adult, and senior. Each <a href="https://www.earth.com/news/dogs-may-respond-to-each-other-through-blinking/">dog</a> was exposed to both the generous and selfish person multiple times. 



The researchers carefully controlled the setup, ensuring consistency across trials. They also ran control sessions to rule out effects like clothing color or position preference.



<h2 class="wp-block-heading" id="h-dogs-don-t-seem-to-judge-people">Dogs don't seem to judge people</h2>



In both the observation (eavesdropping) and direct interaction tests, <a href="https://www.earth.com/news/dogs-can-understand-words-even-in-monotone-speech/">dogs</a> showed no consistent preference. They did not favor the generous partner more than the selfish one. This pattern held across all age groups and both experimental conditions.



"It's clear that reputation formation may be more complex than previously thought, even for animals like dogs that closely cooperate with humans," said corresponding researcher Hoi-Lam Jim, who recently joined the faculty at <a href="https://www.kyoto-u.ac.jp/en" target="_blank" rel="noreferrer noopener">Kyoto University</a>.



Even dogs with more life experience didn’t do better. Older dogs didn’t show stronger preferences. The generous partner’s kind actions didn’t lead to more trust or affection, even after repeated encounters.



<h2 class="wp-block-heading" id="h-complexity-in-social-evaluation">Complexity in social evaluation</h2>



While earlier studies claimed dogs could form reputations, this study addressed key flaws in those designs. Many past results may have stemmed from bias, such as dogs simply responding to visible cues or choosing based on location.



This new research controlled for those factors. The researchers accounted for side preference, controlled for experimenter visibility, and extended trial numbers to give dogs more learning opportunities.



Still, most dogs did not show learning over time. Only three dogs in the entire sample developed a clear preference - two for the generous person, and one for the selfish person.



<h2 class="wp-block-heading" id="h-dogs-may-struggle-to-judge-people">Dogs may struggle to judge people</h2>



Several factors may explain the findings. Pet dogs often encounter friendly strangers, which might reduce their need to quickly assess people’s behavior. 



Since the dogs were not hungry during the study, their motivation to respond to food-based generosity may have been low.



The outdoor setting introduced natural distractions such as sun and shade, and over a third of the dogs displayed side biases that could have influenced their choices. 



The visible presence of food may also have shifted their attention away from evaluating human behavior.



Even chimpanzees, despite their high intelligence, have struggled in similar tests, often requiring dozens of repetitions before showing a consistent preference.



<h2 class="wp-block-heading" id="h-future-research-directions">Future research directions</h2>



The study suggests that forming reputations may require more nuanced setups. The calm and trusting lives of pet dogs may reduce their need to judge unfamiliar people. Free-ranging dogs or working dogs might respond differently.



"It is possible that methodological challenges in the experimental design, particularly the use of a two-choice test, may explain our negative findings, rather than an absence of capacity," said Jim.



Future studies might vary social cues, increase emotional contrast, or test dogs in environments where outcomes matter more - like food security or social belonging.



<h2 class="wp-block-heading" id="h-dogs-may-not-judge-people-as-we-expect">Dogs may not judge people as we expect</h2>



Dogs may not judge us in the way we assume. While they thrive on routine, affection, and social bonds, they might not socially evaluate strangers after just a few interactions.



This doesn’t mean dogs lack intelligence or emotional insight. But reputation-building, it seems, is a more complex process than we once believed.



For now, we may need to rethink the idea that "dogs always know who to trust."



The study is published in the journal <a href="https://link.springer.com/article/10.1007/s10071-025-01967-w" target="_blank" rel="noreferrer noopener">Animal Cognition</a>.



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Do dogs actually judge people? It's not as simple as we thought

Many people trust dogs' instincts when it comes to another...

Person,Watches,Tv,At,Night,In,His,Bed,With,His

Smartphones shining at 3 a.m. feel harmless, yet the glow might be training the body to expect daytime when it most needs sleep. New research following more than 88,000 adults shows that brighter lights are not just a nuisance, they are linked to a sharp rise in several forms of heart <a href="https://www.earth.com/news/heart-cells-grown-in-space-may-help-heal-damaged-hearts/">disease</a>.



<a href="https://www.flinders.edu.au/people/daniel.windred" target="_blank" rel="noreferrer noopener">Daniel Windred</a> of Flinders University and colleagues collected about 13 million hours of wrist-sensor data, then checked health records for almost a decade. 



They <a href="https://www.medrxiv.org/content/10.1101/2025.06.20.25329961v1" target="_blank" rel="noreferrer noopener">found</a> a 23 to 56 percent jump in <a href="https://www.cdc.gov/heart-disease/about/coronary-artery-disease.html" target="_blank" rel="noreferrer noopener">coronary artery disease</a>, heart attacks, heart failure, <a href="https://www.heart.org/en/health-topics/atrial-fibrillation/what-is-atrial-fibrillation-afib-or-af" target="_blank" rel="noreferrer noopener">atrial fibrillation</a>, and stroke among people whose bedrooms were routinely lit after midnight.



<h2 class="wp-block-heading" id="h-night-light-confuses-your-body-clock">Night light confuses your body clock</h2>



Light steers the body’s <a href="https://www.nigms.nih.gov/education/fact-sheets/Pages/circadian-rhythms" target="_blank" rel="noreferrer noopener">circadian rhythms</a>, the near-24-hour cycles that organize hormone release, blood pressure, and metabolism. 



Even brief exposure to a ceiling lamp at night can delay the internal clock by hours, leaving the heart working out of phase with the rest of the body.



The hormone <a href="https://www.hopkinsmedicine.org/health/wellness-and-prevention/melatonin-for-sleep-does-it-work" target="_blank" rel="noreferrer noopener">melatonin</a> normally climbs after dusk and signals blood vessels to relax, which lowers nighttime pressure. Ordinary indoor brightness, roughly <a href="https://pubmed.ncbi.nlm.nih.gov/36950919/" target="_blank" rel="noreferrer noopener">100 lux</a>, can cut melatonin in half and keep vessels tighter for the rest of the night.



Shift-work studies add weight to the concern. A UK Biobank <a href="https://pubmed.ncbi.nlm.nih.gov/34414428/" target="_blank" rel="noreferrer noopener">analysis</a> of 238,661 participants reported that habitual night workers carried a higher risk of incident and fatal <a href="https://www.earth.com/news/air-pollution-may-quietly-scar-your-heart/">cardiovascular</a> disease, partly through disrupted sleep timing.



Bright outdoor lighting is also implicated. Residents of Ningbo, China, who lived under the strongest street illumination had a 43 percent greater chance of cerebrovascular disease compared with those in darker neighborhoods, according to a 2024 American Stroke Association <a href="https://newsroom.heart.org/news/more-exposure-to-artificial-bright-outdoor-nighttime-light-linked-to-higher-stroke-risk" target="_blank" rel="noreferrer noopener">report</a>.



<h2 class="wp-block-heading" id="h-bedroom-lights-and-heart-disease">Bedroom lights and heart disease</h2>



Windred’s team asked volunteers to wear a light meter for one week between 2013 and 2016. The device counted every photon, whether from a bedside lamp, phone screen, or passing headlights.



People in the brightest tenth of the sample needed only about one hour of overhead lighting between midnight and 6 a.m. to qualify for that category. 



Their <a href="https://www.earth.com/news/heart-disease-kills-differently-now-than-five-decades-ago/">cardiovascular</a> trouble began appearing within the eight-year follow-up, independent of age, smoking, genetics, or sleep length.



The pattern held across five cardiovascular outcomes, suggesting a broad effect on vascular tissue rather than one specific pathway. 



Resting blood pressure, blood sugar tolerance, and heart-beat timing all rely on clock genes that switch activity by day and night.



“This is the biggest study of personal light exposure patterns and cardiovascular health to date,” says Windred.



<h2 class="wp-block-heading" id="h-bright-lights-and-women-s-hearts">Bright lights and women's hearts</h2>



Women usually develop heart disease later than men because <a href="https://www.ncbi.nlm.nih.gov/books/NBK538260/" target="_blank" rel="noreferrer noopener">estrogen</a> protects artery walls. In this study, however, women exposed to bright nights faced risks similar to men, erasing the usual gap.



Laboratory work hints at a reason. One <a href="https://pubmed.ncbi.nlm.nih.gov/12390501/" target="_blank" rel="noreferrer noopener">experiment</a> found that women’s pineal glands suppress melatonin more readily than men’s when exposed to the same intensity of light, showing a heightened biological sensitivity.



“The importance of these observations cannot be understated,” says <a href="https://scholars.uab.edu/379-martin-young" target="_blank" rel="noreferrer noopener">Martin Young</a>, <a href="https://www.uab.edu/home/" target="_blank" rel="noreferrer noopener">University of Alabama at Birmingham</a>. 



He notes that modern 24-hour society leaves many people under constant light cues that keep the heart in daytime mode around the clock.



Young adults in the dataset also showed stronger links between night light and heart failure or atrial fibrillation, matching earlier reports that younger shift workers accumulate <a href="https://www.earth.com/news/subtle-warning-signs-what-a-heart-attack-really-feels-like/">risk</a> faster than peers on regular schedules.



<h2 class="wp-block-heading" id="h-impact-of-night-light-beyond-the-heart">Impact of night light beyond the heart</h2>



Clock disruption changes how the body handles glucose, raising the odds of <a href="https://www.e-dmj.org/journal/view.php?number=2879" target="_blank" rel="noreferrer noopener">type 2 diabetes</a>, itself a major cardiac risk. 



Epidemiological studies connect chronic light at night with higher obesity rates and impaired insulin action, even after controlling for diet.



Animal <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7359176/" target="_blank" rel="noreferrer noopener">experiments</a> reveal that mice kept under constant light develop stiffer arteries and thicker heart walls within weeks. 



Although rodents run on a faster clock, the mechanisms, oxidative stress and inflammatory signaling, mirror findings in human shift workers.



Stroke researchers add cerebral concerns. Artificial illumination that shortens sleep by an hour can elevate sympathetic nerve activity the next morning, boosting clot formation potential.



Public-health groups now include healthy sleep in standard heart-fitness checklists. The American Heart Association’s “<a href="https://www.heart.org/en/healthy-living/healthy-lifestyle/lifes-essential-8" target="_blank" rel="noreferrer noopener">Life’s Essential 8</a>” places regular, dark-room sleep on the same level as exercise and diet for protecting arteries.



<h2 class="wp-block-heading" id="h-making-your-bedroom-darker">Making your bedroom darker</h2>



Windred advises selecting a fixed sleep interval and guarding its darkness each night. If nature calls before dawn, use a dim red or amber night-light rather than flipping the bathroom fixture.



Phone manufacturers offer night modes that lower <a href="https://www.earth.com/news/long-term-effects-of-artificial-blue-light-remain-unknown/">blue wavelengths</a>, yet intensity still matters. Experts recommend setting screens below 10 percent brightness after sunset and keeping them an arm’s length away.



Blackout curtains or opaque blinds can block <a href="https://www.earth.com/news/streetlights-make-tree-leaves-too-tough-for-insects-to-eat/">streetlamps</a> that pierce bedroom shades. For renters who cannot change window dressings, an inexpensive sleep mask cuts ambient glow to near zero.



People who work rotating nights can consolidate exposure by using bright, white light during the shift to stay alert, then wearing dark glasses on the ride home to help the brain wind down before bed.



<h2 class="wp-block-heading" id="h-pushing-for-darker-nights">Pushing for darker nights</h2>



Urban planners are beginning to weigh health when designing street lighting. Shielded fixtures that aim beams downward can maintain safety while reducing bedroom spill and sky glow.



Hospital policies are changing too. Some intensive-care units now switch to low-intensity, warm lights overnight, helping patients maintain a circadian signal and possibly recover faster.



Researchers call for <a href="https://www.earth.com/news/heart-cells-grown-in-space-may-help-heal-damaged-hearts/">cardiovascular</a> guidelines to list night lights avoidance alongside salt limits and step counts. The evidence, they argue, shows that avoiding lights at night is not a luxury but daily medicine for the heart.



The study is published in <a href="https://www.medrxiv.org/content/10.1101/2025.06.20.25329961v1" target="_blank" rel="noreferrer noopener">medRxiv</a>.



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Exposure to bright lights at night linked to multiple serious health issues in a new study

Smartphones shining at 3 a.m. feel harmless, yet the glow...

When foresters talk about bringing a scarred hillside back to life, most of the future trees are already waiting underground, tucked inside a living soil seed bank that can lie dormant for years. 



A new nationwide Chinese survey suggests that the health of that hidden reserve depends as much on human planting choices as on climate.



“This is our most exciting find to date!” reported Xiali Guo of <a href="https://english.xju.edu.cn/" target="_blank" rel="noreferrer noopener">Xinjiang Normal University</a>, who led the analysis.



The study examined 920 forest plots and found that planted stands held an average of 3.137 viable seeds per square yard of topsoil, compared with 2.876 in <a href="https://www.earth.com/news/soil-is-losing-nitrogen-along-with-its-climate-fighting-power/">natural</a> stands.&nbsp;



<h2 class="wp-block-heading" id="h-buried-seeds-help-forest-recovery">Buried seeds help forest recovery</h2>



Soil seed banks work like an ecological savings account, releasing seedlings after fire, logging, or drought has wiped the slate clean. Most seeds that land on the surface either decay or are eaten, so those that are buried provide critical insurance.



Guo’s team sampled 537 natural and 383 planted stands, from moist subtropical valleys to arid northern slopes. The higher seed counts in plantations appeared even in regions where native forests boasted greater above ground <a href="https://www.earth.com/news/global-warming-may-trigger-rapid-release-of-soil-carbon/">diversity</a>.



The contrast surprised some ecologists because plantations are often criticized for being species poor. Here, however, management practices such as dense spacing and periodic thinning may create micro sites that trap seeds and shield them from predators.



Seed longevity also differs by depth. Most of the buried treasure sits in the top four inches of soil where oxygen is scarce but moisture is steady.



That layer was the focus of the new survey, ensuring the counts reflected seeds capable of germinating after common disturbances like fire or plowing. The team avoided freshly fallen litter and tested only the persistent layer of the seed bank.



<h2 class="wp-block-heading" id="h-climate-and-light-affect-seed-survival">Climate and light affect seed survival</h2>



Temperature and rainfall each left a clear fingerprint on the buried seed <a href="https://www.earth.com/news/agricultural-soil-is-now-the-worlds-biggest-plastic-dumping-ground/">reserve</a>, and the direction was counterintuitive. 



In both forest types, every 1°F rise in mean annual temperature and each extra inch of rain per year nudged seed density downward, a trend echoed in long term seed viability tests where warmth accelerates aging.



Laboratory work shows that seeds stored at 95°F lose viability far faster than those kept cool, supporting the field pattern. Rising heat also boosts soil dwelling insects and fungi that prey on seeds, shrinking the bank before germination can occur.



<h2 class="wp-block-heading" id="h-rainfall-and-seed-density">Rainfall and seed density</h2>



Rain can have similarly mixed effects. On loamy desert soils, additional summer showers boosted the number of annual herb seeds by up to <a href="https://ecologicalprocesses.springeropen.com/articles/10.1186/s13717-021-00346-w" target="_blank" rel="noreferrer noopener">40 percent</a>, yet washed away or rotted others.



Guo’s data mirrored that complexity, with natural forests showing sharper swings in seed density along the rainfall gradient than plantations, a hint that mixed species stands are more climatically sensitive. Sunlight and evaporative demand told a different story.



Areas soaking up longer daylight hours tended to host richer seed banks, perhaps because parent trees in sunnier spots invest more in reproduction when moisture is not limiting. 



Soil moisture loss, measured as evapotranspiration, had a similar effect, likely tied to shifts in species composition.



<h2 class="wp-block-heading" id="h-soil-nutrients-control-seed-numbers">Soil nutrients control seed numbers</h2>



Soil chemistry turned out to be the heavyweight driver, explaining roughly one third of the variation in seed numbers. Nitrogen stood out in <a href="https://www.earth.com/news/soil-footprint-a-new-frontier-in-sustainable-farming/">plantations</a>, where each additional tenth of a percent of total N corresponded with thicker seed stores.



The connection fits greenhouse <a href="https://onlinelibrary.wiley.com/doi/10.1002/ece3.5151" target="_blank" rel="noreferrer noopener">observations</a> showing that heavy nitrogen deposition can shift germination patterns by altering competitive dynamics in favor of fewer, more aggressive species. In Guo’s plots, though, the added nitrogen seemed to bolster overall seed counts rather than squeeze diversity.



Natural forests responded more strongly to soil pH, with seed density dropping as pH climbed toward neutral. Field burial experiments in English grasslands likewise recorded fewer persistent seeds in soils above pH 5.6, an effect linked partly to faster fungal decay.



These contrasting nutrient controls suggest that managers cannot use a one size fits all fertilization recipe. Instead, they need location specific targets, nitrogen for plantations, pH buffering for native stands, to keep the hidden seed reserve healthy.



<a href="https://www.usgs.gov/special-topics/water-science-school/science/phosphorus-and-water" target="_blank" rel="noreferrer noopener">Phosphorus</a> told a subtler story, trimming seed density in plantations when it climbed above about 0.15 percent of dry soil. The authors think luxuriant phosphorus may let young trees invest in wood growth and canopy spread rather than in producing the next generation of seeds.



<h2 class="wp-block-heading" id="h-tree-traits-shape-underground-seed-bank">Tree traits shape underground seed bank</h2>



Beyond dirt and weather, the way a stand is built matters. Older trees with wider trunks were linked to richer seed banks, probably because mature canopies have had more seasons to contribute litter and fruit.



High planting density told the opposite tale, trimming seed density as tightly packed crowns shaded out under story species and limited seed rain. That pattern aligns with classic regeneration theory that light starved floors tend to be seed poor.



Leaf traits joined the list of subtle influences. Plantations dominated by fast growing species with flimsy, nitrogen rich leaves produced fewer buried seeds per adult tree, hinting at a trade off between rapid growth and reproductive output.



<h2 class="wp-block-heading" id="h-lessons-for-tomorrow-s-forests">Lessons for tomorrow’s forests</h2>



For practitioners tasked with re-greening degraded land, the take home is refreshingly actionable. Boosting <a href="https://www.earth.com/news/soil-is-losing-nitrogen-along-with-its-climate-fighting-power/">soil nitrogen</a> in plantations and keeping pH below about 5.5 in natural stands could raise the seed cushion that smooths post disturbance recovery.



The findings also challenge the notion that plantations are ecological deserts. While they may hold fewer above ground species, their subterranean diversity vault can be surprisingly full, offering an unplanned bonus for large scale restoration.



Policy designers interested in climate smart forestry now have one more lever to pull. Matching plantation designs to local soils and expected warming trends can lock extra resilience into the ground before the first seedling is ever planted.



“Planted forests consistently harbor denser seed banks than natural forests, offering crucial regeneration potential,” Guo concluded. 



As global pledges push for billions of new trees, remembering the seeds already at hand could make those promises cheaper and faster to keep.&nbsp;



The study is published in the journal <a href="https://www.maxapress.com/article/doi/10.48130/seedbio-0024-0020" target="_blank" rel="noreferrer noopener">Seed Biology</a>.



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Buried seeds in soil help forests recover faster after damage

When foresters talk about bringing a scarred hillside back to...

The ocean is vast, wild, and constantly in motion. For animals that rely on it to survive, every trip is a test. Some animals fly, others swim, but all must find their way through a landscape that changes every hour. 



For Magellanic penguins, the challenge is especially tough. These flightless <a href="https://www.earth.com/news/penguins-are-threatened-by-mercury-contamination/">birds</a> must leave the safety of their nests, dive into unpredictable waters, and forage far from land - all while ensuring they return in time to feed their chicks.



Without visual landmarks or a clear view of the coast, the journey becomes more than a physical effort. It becomes a navigation puzzle. A new study reveals how these penguins do it.



Led by Richard Michael Gunner from <a href="https://www.ab.mpg.de" target="_blank" rel="noreferrer noopener">Max Planck Institute of Animal Behaviour</a>, the study shows that Magellanic penguins are not just strong swimmers. They are clever navigators, capable of adjusting their movement in response to ocean currents to travel efficiently and even hunt along the way.



<h2 class="wp-block-heading" id="h-penguins-adjust-to-ocean-currents">Penguins adjust to ocean currents</h2>



The study tracked 27 adult penguins during a single foraging trip in Argentina’s San Matías Gulf. Scientists fitted each <a href="https://www.earth.com/news/emperor-penguins-may-disappear-in-our-lifetime/">bird</a> with GPS and motion sensors. 



These loggers captured heading, speed, dive depth, and prey-catching attempts. The goal was to see how penguins deal with drifting forces without visible land cues.



The researchers discovered that penguins switch strategies based on current strength. When waters were calm, penguins swam in straight lines home. 



In stronger flows, they followed the currents, even if it meant drifting sideways. This made their path longer but saved energy.



<h2 class="wp-block-heading" id="h-penguins-drift-to-save-energy">Penguins drift to save energy</h2>



Penguins didn’t always choose the shortest route. Instead, they allowed the currents to carry them sideways and then corrected course as currents shifted. This created S-shaped return paths. 



These movements were not random. They reduced energy costs by taking advantage of tidal reversals in the 12-hour cycle.



“Our results indicate that penguins notice discrepancies between their intended path and actual displacement over ground, then adjust accordingly,” noted the researchers.



“While penguins still aim broadly toward the colony under strong currents, they exhibit a more dispersed heading distribution, potentially reflecting repeated or fine-scale corrections to compensate for the drift. Such behavior is consistent with effective navigation even when out of sight of land.”



<h2 class="wp-block-heading" id="h-penguins-forage-on-the-way-home">Penguins forage on the way home</h2>



Rather than swimming straight home, penguins adjusted their path to conserve energy and hunt. Many dove over 10 meters deep during their return. 



The penguins caught prey up to 80% of the way back. As they got closer to land, dive depths reduced, and travel paths became more direct.



“Magellanic <a href="https://www.earth.com/news/penguin-poop-helps-form-clouds-that-could-slow-antarctic-warming/">penguins</a> finding their way back to their nests from the open ocean subtly adjust their headings to exploit tidal currents, following paths that reduce energy costs while maintaining remarkable accuracy," wrote the authors of the study.



"Rather than swimming directly home, they drift laterally with the tides, balancing travel efficiency with opportunistic foraging along the way."



<h2 class="wp-block-heading" id="h-penguins-stay-on-course">Penguins stay on course</h2>



The study used advanced modeling to compare real and simulated paths. If penguins followed a fixed heading, they would often miss the colony by several kilometers. 



Real penguins did better. Their deviations were shaped by current strength, prey activity, and dive behavior. The researchers found that current-aligned swimming boosted speed without adding energy cost.



These findings suggest penguins might not detect currents directly. Instead, they may sense how far they have been displaced from their compass-based heading and make adjustments. This could involve mechanosensing or even smell, though the exact cues remain unclear.



<h2 class="wp-block-heading" id="h-incredible-accuracy-over-long-distances">Incredible accuracy over long distances</h2>



Despite navigating rough waters, 85% of Magellanic penguins returned within 984 feet of their departure point. That translates to 99.4% accuracy over a 31-mile journey.



Even those returning at night reached their nests with similar precision, proving that visual cues are not required for successful navigation. 



Scientists believe these <a href="https://www.earth.com/news/emperor-penguins-are-struggling-to-survive-as-sea-ice-vanishes/">penguins</a> may rely on a mix of non-visual tools. Possible mechanisms include detecting magnetic fields, using their sense of smell, or sensing low-frequency sounds like infrasound.



This remarkable ability highlights the penguins’ capacity to orient themselves in the open ocean, even when completely out of sight of their colony.



<h2 class="wp-block-heading" id="h-how-penguins-handle-ocean-currents">How penguins handle ocean currents</h2>



The study shows how animals can respond to unpredictable environments with smart, energy-saving strategies.



By combining direction sensing with dynamic drift usage, Magellanic penguins show a flexible approach that supports both travel and foraging. These insights may apply to other marine species, especially those navigating far from land.



Future research may uncover how these penguins detect and respond to water movement. Until then, their ocean journeys remain a stunning example of natural precision and adaptability.



The study is published in the journal <a href="https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3002981" target="_blank" rel="noreferrer noopener">PLOS Biology</a>.



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How do penguins navigate the ocean? Secret strategy revealed

The ocean is vast, wild, and constantly in motion. For...

Laughing,Woman,With,Friend,Making,Ok,Symbol,With,Thumb,And

Managing stress may not just calm nerves in the moment, it also appears to nudge a person's personality toward the sunnier side and strengthen long‑term health. That insight comes from a long‑running study that tracked 2,022 Americans from middle age into their late sixties.



Participants who learned to keep daily hassles from rattling them grew steadily more extroverted, agreeable, and open to new experiences.



On the flip side, peers whose reactions worsened became quieter, less friendly, and wary of novelty, explains <a href="https://psychology.msu.edu/directory/chopik-bill.html" target="_blank" rel="noreferrer noopener">William Chopik</a>, associate professor of psychology at <a href="https://msu.edu/" target="_blank" rel="noreferrer noopener">Michigan State University</a>, over the years.



<h2 class="wp-block-heading" id="h-calming-small-stress-helps-personality">Calming small stress helps personality</h2>



Researchers call the immediate surge of frustration, worry, or anger that follows a hassle <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7983854/" target="_blank" rel="noreferrer noopener">stress reactivity</a>. 



High reactivity heightens blood pressure, floods the brain with cortisol, and sets the stage for wear and tear known as <a href="https://pubmed.ncbi.nlm.nih.gov/20707675/" target="_blank" rel="noreferrer noopener">allostatic load</a>.



Most people face at least one minor stressor, a traffic jam or sharp email, on more than 40 percent of days. How they interpret and dampen those moments predicts nightly mood, sleep quality, and, over years, physical health.



Daily stress also acts like an invisible drill sergeant, rehearsing the nervous system to react the same way the next time unless conscious countermeasures interrupt the script. Coping skills, therefore, become habits just as rigid as any physical routine.



The new study tests whether changing that habit loop can send ripples upward, influencing <a href="https://www.earth.com/news/where-does-happiness-come-from-it-depends-on-who-you-are/">stable dispositions</a> rather than simply reflecting them.



<h2 class="wp-block-heading" id="h-tracking-stress-and-personality-change">Tracking stress and personality change</h2>



The team mined the <a href="https://sites.psu.edu/nsde/" target="_blank" rel="noreferrer noopener">National Study of Daily Experiences</a>, a project that collects eight‑day diary bursts roughly every decade. 



Volunteers noted whether they argued, raced deadlines, or juggled interruptions, and rated negative feelings each evening.



By averaging those daily scores, the researchers built a personal stress‑reactivity profile for each wave, then examined how those scores rose or fell across nearly two decades.



Crucially, the diaries sat alongside annual inventories of the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6168084/" target="_blank" rel="noreferrer noopener">Big Five personality traits</a>, giving the analysts a rare chance to watch coping shifts and character shifts march forward together.



Sophisticated multilevel structural equation models controlled for age, gender, and baseline personality, reducing the odds that preexisting differences, rather than changing stress skills, explained later trait trajectories.



<h2 class="wp-block-heading" id="h-stress-reactions-changed-personality-traits">Stress reactions changed personality traits</h2>



Across the cohort, reactivity dropped with age, but the pace varied. Adults who cut their emotional spikes the most showed a 4 percent boost in extroversion and a 3 percent rise in agreeableness, compared with peers whose coping stagnated.



“These improvements trickled up to affect how your personality changed over time,” said Chopik. 



Extroversion and agreeableness both predict higher life satisfaction, a pattern confirmed in dozens of studies, including <a href="https://psycnet.apa.org/record/2001-01642-014" target="_blank" rel="noreferrer noopener">work</a> that links sociable moments to larger daily happiness gains.



Openness to experience, the third trait boosted by calmer coping, correlates with lifelong learning and cognitive flexibility, qualities that often buffer aging‑related decline, according to personality <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2743415/" target="_blank" rel="noreferrer noopener">researchers</a>.



<h2 class="wp-block-heading" id="h-how-stress-reshapes-the-brain">How stress reshapes the brain</h2>



Stress hormones interact with brain circuits that govern emotion, planning, and reward. When surges repeat, synapses remodel, gradually making threat detection louder and flexible thinking quieter.



Animal and human studies led by neuroendocrinologist Bruce McEwen show that reducing cortisol spikes can restore hippocampal volume and improve executive function, reinforcing healthier coping <a href="https://pubmed.ncbi.nlm.nih.gov/20707675/" target="_blank" rel="noreferrer noopener">loops</a>.



Functional‑MRI work also finds that people with lower reactivity maintain stronger connectivity between the prefrontal cortex and amygdala, an architecture linked to smoother social interactions.



Over years, that neural rewiring could ease engagement and curiosity, aligning with the trait shifts spotted in the Michigan State dataset.



<h2 class="wp-block-heading" id="h-simple-ways-to-build-stress-resilience-every-day">Simple ways to build stress resilience every day</h2>



<a href="https://www.pnas.org/doi/10.1073/pnas.1813588116" target="_blank" rel="noreferrer noopener">Mindfulness</a>, even in brief smartphone‑based courses, cuts perceived stress and boosts daily social contact, according to a two‑week randomized trial in young adults.



Other tactics, such as labeling feelings, reframing hassles as challenges, or taking ten‑minute walks, tap the same regulatory circuits without the need for formal training.



Cognitive‑behavioral therapy teaches people to challenge stress-driven catastrophic thoughts, while biofeedback provides real‑time heart‑rate clues that guide slower breathing, both methods shown to shrink daily spikes and support personality development.



“If people can find ways to regulate their emotions, that might accumulate and translate to changing their personalities,” added Chopik.



<h2 class="wp-block-heading" id="h-why-personality-change-matters">Why personality change matters</h2>



Shifts toward extroversion and agreeableness are not just socially pleasant; they predict lower loneliness, better teamwork, and even reduced cardiovascular risk.



<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2577457/" target="_blank" rel="noreferrer noopener">Meta‑analyses</a> link openness to experience with healthier aging behaviors, from physical activity to medication adherence, giving the trait medical relevance.



Public‑health economists estimate that boosting average agreeableness by a single point on standard scales could save billions in conflict‑related workplace costs each year, though precise figures remain contested.



Recognizing personality as malleable counters fatalism and supports policies that fund stress management in schools, prisons, and elder‑care centers.



<h2 class="wp-block-heading" id="h-questions-for-future-research">Questions for future research</h2>



The diary method captures only eight days per decade, leaving gaps where major life events could shape both stress and character. 



Broader samples that include younger adults and non‑US cultures would clarify just how universal the effects are.



Scientists also want to test whether interventions that directly target reactivity, biofeedback, <a href="https://www.earth.com/news/mindfulness-meditation-can-rewire-your-brain-for-sharper-focus/">mindfulness</a>, or structured exercise, speed up the desirable personality tilt.



Genetic analyses could reveal whether certain variants make coping skills easier to learn, helping personalize resilience training.



Longer follow‑ups could show whether stress-related gains plateau or cascade, echoing earlier work by Roberts and colleagues indicating that personality traits keep shifting well past retirement age.



The study is published in <a href="https://psycnet.apa.org/record/2026-32285-001?doi=1" target="_blank" rel="noreferrer noopener">Psychology and Aging</a>.



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Study links stress management ability with positive personality traits

Managing stress may not just calm nerves in the moment,...

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https://www.youtube.com/watch?v=3Y4eLFNYrKE
</div></figure>



On the unforgiving landscape of North Greenland, temperatures drop and sunlight barely penetrates through the polar winter. It was here, however, that an international team of scientists found <a href="https://www.earth.com/news/predatory-worms-were-terror-beasts-half-a-billion-years-ago/#google_vignette" target="_blank" rel="noreferrer noopener">evidence of sea monsters</a> that would change our understanding of ocean life in the past.



This video captures the discovery of Timorebestia fossils that had been hidden for more than 500 million years in the Sirius Passet formation. The "terror beasts," as they are called, are a hidden chapter in the evolutionary history of <a href="https://www.earth.com" target="_blank" rel="noreferrer noopener">Earth</a>, showing that sophisticated predator-prey interactions occurred much earlier than previously envisioned.



Dr. Jakob Vinther and his research team at the <a href="https://www.bristol.ac.uk/" target="_blank" rel="noreferrer noopener">University of Bristol</a>, in collaboration with researchers at the <a href="https://eng.kopri.re.kr/" target="_blank" rel="noreferrer noopener">Korean Polar Research Institute</a>, braved extreme weather conditions at 82.5 north latitude to locate these giant creatures. Using sophisticated electron microprobe analysis, they revealed the detailed anatomy of the animals, including their muscle and nerve tissues.



The find upsets the traditional timeline of sea predators. Although we've long appreciated that Cambrian oceans were at one time ruled by <a href="https://www.youtube.com/watch?v=jWI3-UgA3_o&amp;list=PL1QLQMW9MWDwpkFOnvgAmu7wT6rZmYqdJ&amp;index=19" target="_blank" rel="noreferrer noopener">arthropods</a>, these discoveries indicate that relatives of arrow worms were first to dominate the seas. These worms were building sophisticated food webs several million years before other predator groups arose.



Each fossil is a story of ancient hunger, with fossil stomach contents revealing these meter-long beasts dined on heavily armored arthropods regularly, cementing their place as the ocean's first apex predators.



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Worms dominated seas before dinosaurs

https://www.youtube.com/watch?v=3Y4eLFNYrKE On the unforgiving landscape of North Greenland, temperatures drop...

<figure class="wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://www.youtube.com/watch?v=Ow3JH03PqEQ
</div><figcaption class="wp-element-caption">New York is the site of the world's oldest forest.</figcaption></figure>



<h2 class="wp-block-heading" id="h-385-million-year-old-trees-discovered">385-million-year-old trees discovered</h2>



Scientists have uncovered something extraordinary just two hours north of New York City. The <a href="https://www.earth.com/news/worlds-oldest-forest-discovered-close-to-new-york-city/" target="_blank" rel="noreferrer noopener">world's oldest forest</a>, dating back 385 million years, offers a window into how Earth's first complex forests shaped our planet's atmosphere.



Located near <a href="https://townofcairo.com/" target="_blank" rel="noreferrer noopener">Cairo, New York</a>, in Greene County, these weren't merely primitive plants struggling to survive. These were sophisticated trees with root systems remarkably similar to modern forests. This ancient woodland predates dinosaurs by 140 million years.



<h2 class="wp-block-heading" id="h-the-cairo-forest-discovery">The Cairo forest discovery</h2>



385 million years ago, upstate New York was a tropical paradise near the equator. Thanks to continental drift, this ancient forest has traveled thousands of miles to its current location.



The fossil forest sits in an abandoned quarry, roughly half the size of a football field. This represents just a slice of what was likely a massive forest system stretching from New York into Pennsylvania.



Charles Ver Straeten, curator of sedimentary rocks at the <a href="https://www.nysm.nysed.gov/" target="_blank" rel="noreferrer noopener">New York State Museum</a>, made the discovery in 2009. While scouting the former highway department property, his trained eye spotted wandering patterns in the stone that looked like marine features.



<h2 class="wp-block-heading" id="h-revolutionary-age-and-preservation">Revolutionary age and preservation</h2>



The site contains 385-million-year-old rocks with fossilized woody roots forming horizontal patterns up to 18 feet (5.5 meters) wide. As Christopher Berry, a paleobotanist at Cardiff University, explains: "You are walking through the roots of ancient trees."



This discovery pushes back advanced tree evolution by millions of years. The research, published in <a href="https://www.cell.com/current-biology/home" target="_blank" rel="noreferrer noopener">Current Biology</a> in December 2019, fundamentally changes our understanding of when complex forests first emerged.



Researchers believe a massive flood buried the forest floor, creating perfect fossilization conditions. Over millions of years, sediment hardened into rock, preserving these root patterns like nature's time capsule.



<h2 class="wp-block-heading" id="h-meet-archaeopteris-the-first-modern-tree">Meet Archaeopteris: the first modern tree</h2>



The star of this ancient forest is Archaeopteris – not to be confused with the feathered dinosaur Archaeopteryx. This tree was far older and more revolutionary.



William Stein from <a href="https://www.binghamton.edu/" target="_blank" rel="noreferrer noopener">Binghamton University</a> describes the roots as "strikingly modern, essentially what you'd see outside in my yard right now." These weren't simple root systems you'd expect from ancient plants.



Some fossilized roots are six inches (15 centimeters) in diameter, forming 36-foot-wide (11-meter) patterns. These giants grew up to 65 feet (20 meters) tall with five-foot-diameter (1.5-meter) trunks.



<h2 class="wp-block-heading" id="h-climate-changing-impact">Climate-changing impact</h2>



These trees fundamentally changed Earth's environment. Kevin Boyce, a Stanford University geoscientist, explains how their deep roots triggered "weathering," chemical reactions that pulled carbon dioxide from the atmosphere.



This process dropped atmospheric CO2 levels from 10-15 times higher than today to roughly modern concentrations. These ancient trees helped create atmospheric conditions that made complex life possible.



<h2 class="wp-block-heading" id="h-ancient-forest-ecosystem">Ancient forest ecosystem</h2>



The forest was remarkably diverse. Scientists identified Eospermatopteris, palm tree-like plants with short roots that reached 30 feet (9 meters) tall but lacked woody structure. The forest also housed cladoxylopsids and a mysterious third species still being studied.



All reproduced through spores rather than seeds – millions of years before seeds evolved. This tropical environment had no grass, flowers, or flying insects, just towering trees creating Earth's first complex forest canopy.



<h2 class="wp-block-heading" id="h-scientific-significance">Scientific significance</h2>



Before this finding, the Gilboa forest, located 25 miles (40 kilometers) away, held the "oldest forest" title. Cairo's trees are 2-3 million years older, showing that complex forest ecosystems developed much faster than scientists believed possible.



Patricia Gensel, a <a href="https://www.unc.edu/" target="_blank" rel="noreferrer noopener">University of North Carolina</a> paleobotanist, notes: "The size of those root systems is really changing the picture. Even 20 years ago, researchers assumed trees with such complex root systems didn't evolve so early."



The Cairo site presents three unique root systems, suggesting Devonian period forests were diverse ecosystems with different trees occupying different environmental niches, much like today's forests.



<h2 class="wp-block-heading" id="h-modern-preservation-efforts">Modern preservation efforts</h2>



In 2022, New York State Senator Michelle Hinchey secured a $170,000 grant for the town of Cairo to construct specialized fencing around the fossil forest site. The town plans to conduct a feasibility study exploring the possibility of creating an educational center and working lab on-site.



Joe Hasenkopf, chair of the Cairo Planning Board, hopes to partner with educational institutions to create a research facility serving scientists, students, and the public.



<h2 class="wp-block-heading" id="h-lessons-for-today-s-climate">Lessons for today's climate</h2>



Why does a 385-million-year-old forest matter today? It shows how dramatically forests can change Earth's climate. These ancient woodlands created the atmospheric conditions supporting complex life.



Understanding how prehistoric forests transformed the planet helps us appreciate modern forests' critical role in addressing climate change. Forests remain Earth's most effective carbon capture systems.



These prehistoric trees changed Earth's atmosphere by pulling massive amounts of carbon dioxide from the air. As we face modern climate challenges, this ancient forest reminds us of trees' incredible power to transform our planet's environment.



The next time you walk through a forest, remember you're experiencing an ecosystem whose blueprint was established 385 million years ago in upstate New York. These ancient pioneers didn't just survive – they thrived and changed the world forever.



The full study was published in the journal Current Biology.



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Earth's oldest forest found in the United States

https://www.youtube.com/watch?v=Ow3JH03PqEQ New York is the site of the world's oldest...

<figure class="wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://www.youtube.com/watch?v=prrq8Ql81zk
</div><figcaption class="wp-element-caption">Acid rain and a crisis solved.</figcaption></figure>



<h2 class="wp-block-heading" id="h-why-don-t-we-ever-hear-about-acid-rain-anymore-the-environmental-crisis-that-was-solved">Why don't we ever hear about "acid rain" anymore? The environmental crisis that was solved</h2>



Remember the 1980s when acid rain dominated headlines? Dire warnings about rain eating buildings, killing fish, and destroying forests filled every news cycle. Then, almost like magic, acid rain vanished from public discourse. What happened? Did we actually solve one of the late 20th century's most pressing environmental challenges?



The answer might surprise you. Unlike many environmental issues that drag on indefinitely, acid rain represents one of modern history's most successful ecological recovery stories. It's a tale of science, politics, and technology working together to tackle what seemed impossible.



<h2 class="wp-block-heading">What was acid rain?</h2>



Acid rain isn't regular rain having a bad day – it's precipitation that became significantly more acidic due to air pollution. When power plants, factories, and vehicles burn fossil fuels, they release sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere.



<h2 class="wp-block-heading">The science behind it</h2>



Think of acid rain as nature's chemistry experiment gone wrong. These compounds react with water, oxygen, and other chemicals to form sulfuric and nitric acids. When mixed with water vapor in clouds, they create precipitation with dangerously low pH levels.



While clean rain has a pH of about 5.6, acid rain could drop as low as 4.2 to 4.4 – roughly as acidic as tomato juice or coffee. According to US Geological Survey documentation, Scottish chemist Angus Smith first coined "acid rain" in 1872, but it didn't become a household phrase until the 1960s and 1970s when Swedish scientist Svante Odén documented its devastating effects on Scandinavian lakes and European forests.



<h2 class="wp-block-heading">The crisis at its peak</h2>



During the height of public concern, environmental damage was both widespread and visible. This wasn't some abstract future threat – people could see destruction happening in real-time.



<h2 class="wp-block-heading">Environmental devastation</h2>



The most dramatic impacts were impossible to ignore. Research documented by the Adirondack Lakes Survey Corporation and the New York State Department of Environmental Conservation shows that in the Adirondack Mountains, more than 200 lakes became so acidic they couldn't support fish life. The Adirondack Council reports that 409 lakes once supported brook trout, but many lost their fish populations due to acid rain.



By 1976, when scientists cataloged all acidified lakes in the Adirondack Park, researchers found that half of the lakes over 2,000 feet above sea level had no fish, according to studies published in environmental journals. The acidification process worked like a slow-motion disaster. As acid rain fell into watersheds, it gradually lowered pH levels. Fish couldn't survive in acidic water, and their food sources died off too.



Trees at high elevations showed stress directly linked to acid rain. It weakened them by leaching nutrients and making them susceptible to disease. Historical records show Germany's Black Forest saw nearly half its trees damaged by the mid-1980s.



<h2 class="wp-block-heading">Economic impact</h2>



Acid rain wasn't just environmental – it was expensive. Acidic precipitation corroded infrastructure, buildings, and monuments. Historic stone structures deteriorated at accelerated rates. Tourism suffered as lakes became fishless and forests declined. EPA economic analyses from the period documented repair costs mounting into billions annually.



<h2 class="wp-block-heading">The solution: government action and technology</h2>



Transformation from crisis to success required unprecedented cooperation between governments, industries, and environmental groups.



<h2 class="wp-block-heading">The Clean Air Act of 1990</h2>



The turning point came with the Clean Air Act Amendments of 1990, signed by President George H.W. Bush. This represented a fundamentally new approach to environmental regulation, as documented in EPA historical records.



<h2 class="wp-block-heading">Cap-and-trade success</h2>



Instead of mandating specific technologies, the 1990 amendments introduced something revolutionary: a cap-and-trade system for sulfur dioxide emissions. EPA program documentation shows this market-based approach set overall limits but allowed companies to trade emission allowances.



The genius was harnessing market forces to find cost-effective pollution reduction. Companies reducing emissions cheaply could sell excess allowances to those facing higher costs. Research published in environmental economics journals and EPA progress reports shows this resulted in dramatic SO2 reduction at a fraction of projected costs.



<h2 class="wp-block-heading">Technology advances</h2>



Policy provided the framework, but technology made reductions possible. Studies in atmospheric science journals document the widespread adoption of flue gas desulfurization systems ("scrubbers") that removed sulfur dioxide before it reached the atmosphere. By the 2000s, new installations could remove over 95% of SO2 emissions, according to EPA technical reports.



The push coincided with cleaner energy development. Natural gas produces fewer sulfur compounds than coal. Wind and solar, emerging in the 1990s, captured growing market share, reducing reliance on high-sulfur coal.



<h2 class="wp-block-heading" id="h-why-we-don-t-hear-about-it-today">Why we don't hear about it today</h2>



Why did acid rain disappear from headlines? Simple: the problem was largely solved.



<h2 class="wp-block-heading">Success doesn't make news</h2>



There's an old journalism saying: "If it bleeds, it leads." Environmental success stories don't generate urgency like crisis reporting. Media attention shifted to other challenges: climate change, plastic pollution, and biodiversity loss. There's only so much environmental anxiety the public can absorb, and newer concerns replaced acid rain.



<h2 class="wp-block-heading">Mission accomplished</h2>



The primary reason is beautifully simple: interventions worked. EPA monitoring data shows sulfur dioxide emissions dropped over 90% since 1990. Academic research published in environmental science journals confirms pH levels in formerly affected areas returned closer to normal. This represents one of history's most dramatic environmental recoveries. Studies by the Adirondack Lakes Survey Corporation show fishless lakes now support healthy populations. Forests recovered, and building damage slowed dramatically.



<h2 class="wp-block-heading" id="h-is-it-really-gone">Is it really gone?</h2>



The crisis is largely resolved, but monitoring data shows the problem isn't completely eliminated – it's managed to acceptable levels. Some areas still experience occasional events during high pollution periods. International environmental research indicates that rapidly industrializing Asian countries face similar problems to what we experienced decades ago, though they're implementing successful strategies.



EPA research shows nitrogen oxide emissions proved more challenging than sulfur dioxide, coming from vehicles and mobile sources. Climate science studies suggest changing weather patterns add complexity to how acid rain forms and falls.



<h2 class="wp-block-heading">What this teaches us</h2>



The acid rain experience proves that seemingly intractable environmental problems can be solved with scientific understanding, political will, and technological innovation. Environmental monitoring data shows recovery speed was remarkable – within a decade, measurable improvements appeared in air quality and ecosystem health.



Success came from bipartisan support across party lines. Policy analysis studies show the market-based approach appealed to those preferring economic incentives while achieving environmental goals. This support created lasting policy surviving political changes.



<h2 class="wp-block-heading">Conclusion</h2>



Acid rain's disappearance from public consciousness represents environmental science's greatest success stories. Through effective regulation, technological innovation, and international cooperation, we transformed an overwhelming crisis into a manageable challenge.



Today's silence isn't because we forgot – it's because we solved it. The 1990 Clean Air Act, combined with technology and energy market changes, reduced acid rain emissions over 90%, according to comprehensive EPA data analysis.



This success offers hope for current challenges. It proves complex problems can be solved when science, policy, and technology work together. As we face climate change and plastic pollution, acid rain reminds us that dramatic positive change is possible.



Next time someone asks whether environmental regulations work, remember acid rain. It's proof that sometimes, we get it right.



<hr class="wp-block-separator has-alpha-channel-opacity"/>



Sources: This article draws from EPA official documentation and progress reports, peer-reviewed research published in environmental and atmospheric science journals, historical data from the Adirondack Lakes Survey Corporation, New York State Department of Environmental Conservation records, US Geological Survey publications, policy analysis studies, and environmental monitoring data collected over three decades.



<h2 class="wp-block-heading">Frequently Asked Questions</h2>



1. Is acid rain completely gone? No, but EPA monitoring shows it's reduced to manageable levels. US sulfur dioxide emissions dropped over 90% since 1990, making acid rain much less severe than the 1980s crisis.



2. How long did solving take? Environmental monitoring data shows significant improvements began within 5-10 years of 1990s emission controls. Full ecosystem recovery took longer – some areas need 20-30 years for complete recovery.



3. What made the solution successful? Clear scientific understanding, visible damage motivating action, bipartisan support, available technology, and innovative market-based policies like cap-and-trade.



4. Do other countries have acid rain problems? Yes, particularly rapidly industrializing Asian countries. However, international environmental research shows many implement similar successful control strategies.



5. Could acid rain return? Potentially, if regulations weaken or we return to high-sulfur coal without controls, though effects would take years to become severe according to environmental projections.



6. Can you recommend any teaching tools on the subject of "acid rain"? The United States Environmental Protection Agency produced a wonderful teacher's guide for ages 14 and under that you can find on the EPA website here: <a href="https://www.epa.gov/sites/default/files/2017-03/documents/teachersguide.pdf" target="_blank" rel="noreferrer noopener">https://www.epa.gov/sites/default/files/2017-03/documents/teachersguide.pdf</a>



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The environmental problem we actually solved

https://www.youtube.com/watch?v=prrq8Ql81zk Acid rain and a crisis solved. Why don't we...

Fresh,Radish,Harvest,On,Soil,In,Garden.

<figure class="wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://youtu.be/Fi2OeEwuzRM?si=vTyd2m9FMmtyWkex
</div></figure>







Mid-July is an opportune time to kick-start a thriving fall garden, and this guide lays out the best vegetables and herbs to plant now for a fruitful autumn harvest. 



Fast-growing leafy greens such as spinach, lettuce, kale, and arugula perform especially well in the waning summer heat, with harvests beginning as soon as 30 days. 



These cool-season crops relish the transition into fall, offering repeated yields with cut-and-come-again methods.



Root vegetables like radishes, carrots, and beets also excel during this period. Radishes deliver satisfaction in under a month, while carrots and beets mature in about two months. Employing succession planting ensures a continuous stream of produce deep into the cooler months. 



For a boost of fresh flavor, herbs like cilantro, basil, dill, and chervil are excellent picks. These heat-loving varieties flourish in July’s warmth and are harvest-ready in about 30 days, especially when sown continuously.



Gardeners in zones 6 through 9 can benefit from planting bush beans and snap peas, which don’t require trellising and are ideal for compact plots. 



Maturing in 50–60 days, they’re a smart choice for quick, protein-rich harvests. For those in hotter regions, heat-tolerant crops such as okra and southern peas provide reliable yields and thrive in scorching conditions.



This guide emphasizes more than crop selection—it highlights the importance of timing, soil preparation, and ongoing sowing techniques. 



With thoughtful planning and attention to regional climate needs, even late-summer gardeners can enjoy fresh salads, hearty stews, and the satisfaction of a robust, homegrown harvest well into fall.



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What to plant in your garden in mid-July

https://youtu.be/Fi2OeEwuzRM?si=vTyd2m9FMmtyWkex Mid-July is an opportune time to kick-start a thriving...

Green,Ecoduct,Over,An,Empty,Highway,During,Sunset.

<figure class="wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://youtu.be/XYgiPzmNBTU?si=eFYY7gPHU1JznLvU
</div></figure>



A new long-term study in Monkton, Vermont, reveals that wildlife tunnels significantly reduce amphibian road mortality during seasonal migrations. 



Frogs and salamanders often cross roads to reach breeding ponds each spring, but many are killed by vehicles. 



Researchers from the <a href="https://www.uvm.edu/" target="_blank" rel="noreferrer noopener">University of Vermont</a>, in collaboration with local citizens and the Vermont Agency of Natural Resources, installed two underpass tunnels in 2015. 



Over a 12-year monitoring period, they observed an 80.2% reduction in amphibian deaths, and up to 94% for non-climbing species like salamanders. 



The study used a before-after-control-impact design and documented more than 5,200 amphibians, highlighting the tunnels’ effectiveness even in nearby buffer zones.



Funded at $342,397 - far cheaper than wildlife crossings for large mammals - the project showcased the power of community-led conservation.



Local groups initiated the effort after observing mass amphibian deaths. Wildlife cameras later captured over 2,200 amphibians using a tunnel in just one spring, along with other species like raccoons and bobcats, indicating wider ecosystem benefits.



This marks the first peer-reviewed, long-term data set in the northeastern U.S. confirming amphibian-specific underpasses work. 



The study urges transportation departments to incorporate these designs into road planning and highlights how community action, thoughtful infrastructure, and persistence can make a real difference for biodiversity.



The full study was published in the <a href="https://linkinghub.elsevier.com/retrieve/pii/S1617138125000780" target="_blank" rel="noreferrer noopener">Journal for Nature Conservation</a>.



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Wildlife tunnels save millions of amphibians

https://youtu.be/XYgiPzmNBTU?si=eFYY7gPHU1JznLvU A new long-term study in Monkton, Vermont, reveals that...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nushagak Bay in southwest Alaska

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Flu viruses are more flexible than expected

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Detecting mercury contamination with the tap of a finger

[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

How does salt makes things taste better?

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Santiago, Chile in South America

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Spiral,Galaxy,,Illustration,Of,Milky,Way

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Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Interactive map of the universe includes 200,000 galaxies

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The province of Zaragoza in northeast Spain

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The rapid retreat of the Columbia Glacier

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The Pyrenees Mountains in southwest Europe

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Earth,Like,Exoplanet,3d,Render

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Two distant planets may be "water worlds"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites reveal how Earth's systems are interconnected

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