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...

During the Triassic period, early <a href="https://www.earth.com/video/new-evidence-reveals-that-dinosaurs-died-in-the-spring/">dinosaurs</a> evolved but it wasn’t until mass extinction ushered in the Jurassic did dinosaur diversity explode. New research looks at the complex causes of the mass extinction event that paved the way for more dinosaurs.&nbsp;



“This new study adds soil erosion and wildfire activity to the list of factors that drove this mass extinction to end the Triassic era, building on our previous research that found a rise in levels of acid and hydrogen sulfide in the ocean caused by rapid increases in carbon dioxide due to a surge in volcanic activity," explained Dr. Calum Peter Fox of WA-Organic and Isotope Geochemistry Centre (WA-OIGC).



"Similar to modern large-scale fire events that are driven by climate change, periods of wildfire activity have significant impacts for land-dwelling fauna and flora and drive environmental and ecosystem stress that can lead to mass extinctions.”



Dr. Fox and colleagues investigated the ancient fires at the end of the Triassic and found similarities to the modern rise of atmospheric carbon.&nbsp;



“By studying polycyclic aromatic hydrocarbons, which can be formed during the incomplete combustion of organic matter, we found that soil erosion was a more prominent terrestrial ecological stress than intensive wildfire activity during the end-Triassic mass extinction event in the Bristol Channel of the south-west United Kingdom," said Dr. Fox.



"This tells us land and marine ecosystem and environmental stresses occurred at the same time and were likely exacerbated by soil erosion, with fire activity likely to be more localised in other areas rather than widespread across Europe.”



Professor Kliti Grice also found similarities between the modern land degradation caused by soil erosion and the likelihood of the same thing happening at the close of the Triassic.&nbsp;



“These processes certainly have implications in the modern day due to the introduction of pollutants and pesticides," said Professor Grice.



"Observing that soil erosion had major impacts in our history and in comparing and contrasting a global record of the past, we can anticipate the scale and duration of currently-occurring and future soil erosion events.”



The scientists hope that by looking to the past at previous mass extinction events, we might be able to better understand the one we’re living through now and potentially even mitigate it.&nbsp;



---



By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Soil erosion and fire contributed to Triassic mass extinction

During the Triassic period, early dinosaurs evolved but it wasn’t...

As <a href="https://www.earth.com/news/spread-coyotes-deer-numbers/">coyotes</a> have spread outside their native regions from the western United States towards the east, they have started to hunt North Carolina’s two native species of fox. A new study led by <a href="https://www.ncsu.edu/">North Carolina State University</a> has found that preserving tree cover may be essential in helping the gray fox survive with coyotes in rural areas, most probably due to the fox’s ability to climb trees. However, in suburban forest fragments, gray foxes appeared to be able to easily coexist with the coyotes.



“Coyotes are well known to persecute smaller foxes,” said study co-author Roland Kays, an associate professor of Biology at NC State University. “They go out of their way, more than you see in other interactions between species, to really bully, chase and kill the smaller foxes. There is some reason for concern if this species is going to survive. How is that going to happen in an urban environment where you also have people?”



Professor Kays and his colleagues used wildlife photos taken by volunteers to find out in which places coyotes and gray foxes coexist. They discovered that the two species are most likely to be found together in regions with high housing density and low forest cover, such as the suburbs.



“These two species were more likely to use the same sites in suburban areas, especially small forested wood lots,” said study lead author Arielle Parsons, a postdoctoral researcher at NC State University. “We expected them to use these wood lots at different times to avoid each other, but actually we found that they use these suburban forest fragments at the same time.”



According to the scientists, the two species could coexist in the suburbs because coyotes are just moving through, without establishing territories. In rural areas though, coyotes and foxes are less likely to be seen together. However, gray foxes were more likely to inhabit rural regions with extensive tree cover.



“Gray foxes are very good at climbing trees; they have sharp claws,” said Professor Kays. “They’re one of the only dog relatives that can climb trees. Coyotes can’t. It could be that climbing trees helps them deal with coyotes.”



Thus, gray foxes appear to be at risk in areas with few houses and little tree cover. “There are things we can do to change the ways wildlife species are able to adapt to human-dominated environments. Reducing habitat fragmentation and preserving forest and green spaces can help enhance the ability for these species to coexist,” concluded Dr. Parsons.



The study is published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.3993">Ecosphere</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Trees help gray foxes coexist with coyotes

As coyotes have spread outside their native regions from the...

NASA is preparing to send humans to Mars sometime in the next decade. However, a three-year long mission will expose <a href="https://www.earth.com/news/what-hibernating-squirrels-can-teach-space-travelers/">space travelers</a> to a long period of microgravity, which will cause them to lose bone mass. A new study presented at the meeting of the <a href="https://www.acs.org/content/acs/en/meetings/acs-meetings/registration/why-attend.html">American Chemical Society</a> (ACS) argues that a special, transgenic type of lettuce could be grown by astronauts embarked in long space trips, and may help them guard against bone loss through a bone-stimulated hormone that it contains.



Previous studies of astronauts on long space missions have shown that they lose an average of one percent of bone mass during each month spent in space – a condition called osteopenia. While at the moment, astronauts on the International Space Station perform certain physical exercises to maintain bone mass during their six-month long stays, a three-year long mission to Mars would leave astronauts vulnerable to osteopenia, and later, osteoporosis.



A medication containing a peptide fragment of human parathyroid hormone (PTH) stimulates bone formation and could guard astronauts against osteopenia, but it requires daily injections. According to scientists from the <a href="https://www.ucdavis.edu/">University of California, Davis</a>, an easier and more practical way is to use plants such as lettuce to synthesize pharmaceuticals like PTH.&nbsp;



In order to increase PTH’s stability and bioavailability in the body, the researchers attached a piece of another protein - the fragment crystallizable (Fc) domain of a human antibody - to PTH’s sequence. Fc increases the time that the attached peptide circulates in the blood, making it more effective. To introduce a gene encoding PTH-Fc to lettuce, the scientists infected plant cells with Agrobacterium tumefaciens, a species of&nbsp;bacteria used in the laboratory to transfer genes to plants. The resulting plants express about 10 to 12 milligrams of the modified peptide hormone per kilogram of fresh lettuce.



“One thing we’re doing now is screening all of these transgenic lettuce lines to find the one with the highest PTH-Fc expression,” said study co-author Karen McDonald, a chemical engineer at UC Davis. “We’ve just looked at a few of them so far, and we observed that the average was 10-12 mg/kg, but we think we might be able to increase that further. The higher we can boost the expression, the smaller the amount of lettuce that needs to be consumed.”



Before this lettuce can reach astronauts’ plates though, the scientists must optimize the PTH-Fc expression levels, and then test the lettuce for its ability to safely prevent bone loss in animal models and human clinical trials.&nbsp;&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Special lettuce could protect astronauts from bone loss

NASA is preparing to send humans to Mars sometime in...

Spring is arriving earlier in northern climates as <a href="https://www.earth.com/news/rainfall-patterns-will-decide-if-miami-blue-butterflies-can-survive/">rainfall</a> becomes less frequent, according to a new study from the <a href="https://www.nsf.gov/">National Science Foundation</a>. The experts identified a link between a drop in the total number of rainy days each year and the early appearance of leaves.



While experts had already determined that rising temperatures have led to the first leaves coming out at earlier dates, this research shows that fewer rainy days play the second largest role in this early leaf-out, explained study co-author Desheng Liu of The Ohio State University.



"Scientists have looked mainly at how temperature affects when leaves first appear and, if they considered precipitation at all, it was the total amount," said Liu. "But it isn't the total amount of precipitation that matters the most – it’s how often it rains."



The results of the study showed that a decline in rainfall frequency will cause spring to emerge an additional one to two days earlier each decade through the end of the century.



"This study exemplifies the complex consequences of climate change," said Rainer Amon, a program director in NSF's Office of Polar Programs. "We are not simply facing a warmer atmosphere, but also a shift in the diurnal and seasonal timing of biological processes on a global scale."



The researchers explained that fewer rainy days lead to the earlier arrival of spring because trees and other plants are receiving more solar radiation earlier in the year, which stimulates leaf growth.



With fewer rainy days, daytime temperatures are hotter as more sunlight heating reaches the Earth’s surface and atmosphere.&nbsp;



The study was focused on data north of 30 degrees latitude, which includes most of the United States. The experts analyzed satellite images that recorded when vegetation started to turn green from 1982 to 2018. This data was compared with the number of rainy days during each season.&nbsp;



According to study co-author Jian Wang, the findings demonstrate that we should expect an even earlier spring in the future compared to what current models tell us.



The study is published in the journal <a href="https://www.nature.com/nclimate/">Nature Climate Change</a>.



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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

Spring is arriving earlier as rainy days become less frequent

Spring is arriving earlier in northern climates as rainfall becomes...

The evolution of jaws in early vertebrates was an extremely significant innovation. The fossil record shows that the earliest jawed fish were around at the start of the Devonian Period, just over 400 million years ago. Prior to that, all fish were jawless, much like the hagfish and lampreys of today. Jaws allowed vertebrates to exploit a wide range of food sources, and to become formidable <a href="https://www.earth.com/news/predators-help-prevent-biodiversity-loss/">predators</a>.&nbsp;



However, a research team led by the <a href="https://www.bristol.ac.uk/">University of Bristol</a> has shown that fish with the earliest jaws were stuck in a compromise between maximizing the strength of their jaws and their bite speed. Big, strong jaws would enable the fish to handle sizeable prey, but the weight of these jaws would make lightning-speed reactions impossible. It seems that, irrespective of the particular way in which early fish species evolved to use their jaws, they were always faced with this same trade-off.&nbsp;



Jaws evolved from the gill arches of jawless fish; these structures supported the gills of early fish and therefore had more of a gaseous exchange function. In fact, the original selective advantage gained by fish with jaws was probably related to increased efficiency in gaseous exchange, rather than to feeding. However, the advantages of jaws for feeding would soon have made this their primary function. All vertebrate jaws, including the human jaw, evolved from the early fish jaw plan.&nbsp;



The new study, which is published in the journal <a href="https://www.science.org/journal/sciadv">Science Advances</a>, investigates how a breathing structure came to be a successful biting structure and what constraints there were on this evolutionary change. The researchers collected data on the shapes of the earliest fossil jaws and developed mathematical models to characterize them. They then imagined the range of theoretical jaw forms that early fish might have exploited, and ran these through the model in order to characterize them and compare them to the actual fossil jaws.&nbsp;&nbsp;



Previous research had identified that the jaws in early fish fossils are rather similar, showing little of the diversification and radiation that evolutionary biologists might have expected for such a useful innovation. However, when the researchers tested all the different jaw shapes (both actual and theoretical) for their strength (how likely they were to break) and speed (how efficiently they could be opened and closed), they found that the jaws of early fish represented an optimal trade-off between these two factors. They had already reached this state of optimal compromise early on in evolutionary history.



The researchers say their results show that many fish taxa have independently evolved similar jaw morphologies that represent a compromise between strength and snappiness, and that this is evidence for a widespread convergence in jaw shape. Since this optimality was achieved very early in jaw evolution, they feel this supports the idea that early jaws were soon adopted for a predatory function, which would have required both speed and strength.&nbsp;



Some fish groups appear to have evolved away from this optimum balance between strength and speed over time, perhaps as a result of specializing in slower prey or prey that are smaller or weaker. For example, feeding on plankton by filtering the water would not require optimum strength in the jaws.&nbsp;



“Jaws are an extremely important feature to gnathostomes – or jaw-mouths. They are not only extremely widespread, but almost all creatures that have them, use them in the same way – to grab food and process it. That’s more than can be said for an arm or a foot or a tail, which can be used for all sorts of things," said study lead author <a href="https://research-information.bris.ac.uk/en/persons/william-j-deakin">William Deakin</a>, who is a PhD student at the&nbsp;University of Bristol.



“This makes jaws extremely useful to anyone studying the evolution of function. Very different jaws from very different animals can be tested in similar ways. Here we have shown that studies on a large variety of jaws, using theoretical morphology and adaptive landscapes to capture their variety in function, can help shed some light on evolutionary questions.”



According to study co-author Professor <a href="https://www.bristol.ac.uk/people/person/Philip-Donoghue-4fd2d6ef-3986-4566-97e4-7ae7db296525/">Philip Donoghue</a>, the earliest jawed vertebrates have jaws in all shapes and sizes, long thought to reflect adaptation to different functions. "Our study shows that most of this variation was equally optimal for strength and speed, making for fearsome predators.”



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Early animal jaws optimized bite strength and speed

The evolution of jaws in early vertebrates was an extremely...

<a href="https://www.earth.com/news/invasive-species-are-arriving-with-ships-in-antarctica/">Antarctica</a> – the coldest place on the planet – has recently experienced an episode of warm weather unlike any ever observed, shocking climate scientists worldwide. The temperatures over the eastern Antarctic ice sheet have soared to 40°C above normal, causing an unusual amount of melting for this region.&nbsp;



For instance, the average high temperature during March in Vostok – a Russian meteorological observatory located about 808 miles from the South Pole at the center of the eastern ice sheet – is around minus 53°C. But on Friday, March 18, the temperature leapt to -17.7°C, breaking the previous record by a staggering 15 degrees.



“In about 65 record years in Vostok, between March and October, values ​​above -30°C were never observed,” said climate journalist Stefano Di Battista. “Antarctic climatology has been rewritten.”



Jonathan Wille is an expert in Polar Meteorology at the <a href="https://www.univ-grenoble-alpes.fr/">Université Grenoble Alpes</a> in France. He told the Washington Post: “This event is completely unprecedented and upended our expectations about the Antarctic climate system." Temperatures running at least 32°C above normal have expanded over vast regions of eastern Antarctica from the Adélie Coast through most of the eastern ice sheet’s interior. Computer modeling suggests that in some areas the temperatures might have even climbed up to 50°C above normal.



According to Professor Wille, these warming was initiated by an extreme atmospheric river (a narrow corridor of water vapor in the atmosphere) on Antarctica’s east coast. This atmospheric river made landfall on Tuesday, March 15, between Dumont d’Urville and Casey Stations and caused a massive amount of rainfall, potentially leading to a significant melting event in the area.&nbsp;



Afterwards, the moisture from the storm diffused and spread over the interior of the continent. The moisture was prevented from escaping by a strong blocking high pressure system - a so-called heat dome. “This is not something we’ve seen before,” said Professor Wille. “This moisture is the reason why the temperatures have gotten just so high.”



While it is difficult to attribute this one event to climate change, Professor Wille and his colleagues do think that rising temperatures helped prime conditions for such an event and that this could be just the beginning of even more extreme occurrences.&nbsp;



“We do believe they will become more intense because it just simple physics … but the details, we’re still trying to figure that out. It would be very difficult to say that there’s not a climate change fingerprint on an event like this,” Professor Wille told the Post.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Soaring temperatures in Antarctica have scientists in shock

Antarctica – the coldest place on the planet – has...

Millions of Joro spiders are expected to colonize the entire East Coast this spring. The spiders will literally drop from the sky, using their webs like parachutes. The invasion is predicted to begin in May, and while it may sound terrifying, experts say we have nothing to fear.



Joro spiders are large spiders with bright blue and yellow striped bodies and black and red legs. The spiders are native to most of Japan but arrived in the United States around the year 2013. Gaining a foothold in Georgia, Joro spiders have spread throughout the southeastern US.&nbsp;



With their colorful bodies and the golden silk they produce, Joro spiders are easy targets for human aggression. However, unlike some other <a href="https://www.earth.com/news/invasive-species-can-hitchhike-on-ocean-plastic/">non-native species</a>, Joros do not seem to cause any harm. In fact, the spiders may possibly provide another food source for birds and are fairly harmless to people and their pets.&nbsp;



Unless directly threatened. Joro spiders do not bite. When they do, their fangs are often too small to pierce human skin. New research from the <a href="https://www.uga.edu/">University of Georgia</a> suggests that the spiders are just beginning their spread throughout the US.&nbsp;



“People should try to learn to live with them," said study co-author Andy Davis. "If they’re literally in your way, I can see taking a web down and moving them to the side, but they’re just going to be back next year.”



"The way I see it, there’s no point in excess cruelty where it’s not needed,” added co-author Benjamin Frick, an undergraduate researcher in the School of Ecology. “You have people with saltwater guns shooting them out of the trees and things like that, and that’s really just unnecessary.”



The research compared the physiology of Joro spiders with the golden silk spider, which arrived in the US from the tropics about 160 years ago. The study showed that the golden silk spiders have remained in the southeast because their low metabolisms and slow heart rate leave them vulnerable to cold. The same can not be said for Joro spiders with heart rates 77 percent higher.&nbsp;



“Just by looking at that, it looks like the Joros could probably survive throughout most of the Eastern Seaboard here, which is pretty sobering,” said Davis.



The spiders can move around by ballooning a ride on air currents using their silk. Just as likely, they may hitch a ride with people on cars, planes, anything that moves.&nbsp;



“The potential for these spiders to be spread through people’s movements is very high,” said Frick. “Anecdotally, right before we published this study, we got a report from a grad student at UGA who had accidentally transported one of these to Oklahoma.”



Even though a future where Joro spiders live throughout the eastern US is a very real possibility, the authors caution that it’s no reason to fear. Actually, if we are to find blame we should just look in the mirror.&nbsp;



“There’s really no reason to go around actively squishing them,” said Frick. “Humans are at the root of their invasion. Don’t blame the Joro spider.”



The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/13653032">Physiological Entomology</a>.



Image Credit: UGA/Submitted Photo



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By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Millions of Joro spiders will parachute out of the sky this spring

Millions of Joro spiders are expected to colonize the entire...

A new study led by the <a href="https://www.unsw.edu.au/">University of New South Wales</a> (UNSW) in Sydney has investigated the long, slender keratin plates that hang from the upper jaw of humpback and southern right whales, which allow them to take in many small <a href="https://www.earth.com/news/fear-of-predators-can-damage-prey-as-much-as-predation-itself/">prey</a> at one time&nbsp; (known as “baleen plates”). The goal of the research was to understand changes in these whales’ movements and behaviors over time.&nbsp;



The experts discovered that changes in the dietary habits of these whales going back almost 60 years correspond with changing climate cycles. These findings suggest that it is possible to link feeding patterns with climate conditions by analyzing whale baleen.



“What is incredible is that all of this information about dietary and spatial patterns has been unlocked just through analyzing plates in their mouths,” said study lead author Adelaide Dedden, a doctoral student at UNSW. By comparing the information stored in the baleen of humpback and right whales in the Indian and Pacific Oceans with environmental data, Dedden and her colleagues have revealed how the whales’ behaviors reflected changes in climate conditions over time.



For instance, humpback whales migrating along the east coast of Australia showed signs of poorer feeding opportunities during La Niña phases (a large-scale climate cycle which drives food availability in the Southern Ocean).



“Baleen whales are enormous and need huge amounts of food. This makes them vulnerable to changes in the environment, but this is also compounded by their survival strategy,” explained study senior author Tracy Rogers, a marine ecologist at UNSW. “They fast for the long periods when they leave their productive feeding grounds to breed. That’s why they’re extremely susceptible to changes in ocean-atmospheric cycles as they can drive food availability.”



“With La Niña events predicted to increase in intensity and frequency, it unfortunately means these whales may continue to have more of these poorer feeding prospects, and we could see more strandings in the future.”



However, researchers found that humpbacks from the west coast of Australia who feed in the Indian Ocean showed increased feeding success during La Niña periods. At the same time, their east coast counterparts also seem to adapt to different feeding strategies in more temperate waters on their migration routes. These findings offer hope that these animals may turn out to be more resilient to climate change than initially thought.&nbsp;



Yet, urgent actions to mitigate climate change will likely make a big difference for whale populations. “We need to act now while we still can. Acting on climate change now is good for whales but also for all of us,” Professor Rugers concluded.



The study is published in the journal <a href="https://dx.doi.org/10.3389/fmars.2022.832075">Frontiers in Marine Science</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Unlocking the secrets of whales through their mouths

A new study led by the University of New South...

A new study led by the <a href="https://warwick.ac.uk/">University of Warwick</a> has found that social mingling shapes and transforms the “vocabularies” of apes, just as it does in the case of humans. The scientists discovered that, as opposed to a fixed repertoire of instinctive, automated calls, wild <a href="https://www.earth.com/news/orangutans-have-the-cognitive-ability-to-make-and-use-stone-tools/">orangutans</a> show evidence of distinct “vocal personalities” that are molded by the social groups in which they live and communicate.



Living alongside orangutan communities in the low forests and swamps of Borneo and Sumatra in Southeast Asia, the researchers recorded the calls of around 70 individual apes across six populations. These populations differed naturally in density, ranging from groups that socialized intensely to more dispersed ones.&nbsp;



In high-density populations, the apes communicated by using a large variety of original calls, continuously trying out many novel sound variants which were often modified or even discarded completely.&nbsp;



By contrast, orangutans living in sparser, lower densities populations showed preference for more established, conventional calls. While these groups did not experiment with such a large number of novel sounds, when they did introduce new call variants, they tended to keep it, making their repertoire richer than that of apes living in high-density populations.



These results suggest that communication was also socially shaped in the case of our direct, extinct ape-like ancestors. This kind of social influence – though modest at first, before the rise of fully operational languages – could have then increased steadily, ultimately leading to the variety of ways in which human language is determined by those who surround us.



“Great apes, both in the wild and captivity, are finally helping us to resolve one of the longest-standing puzzles in science – the origin and evolution of language,” said study lead author Dr. Adriano Lameira, an assistant professor of Psychology at the University of Warwick. “We can now start conceiving of a gradual path that likely led to the rise of the talking ape, us, instead of having to attribute our unique verbal skills and advanced cognition to divine intervention or random genetic jackpot.”



“Many more clues await us in the lives of our closest living relatives, as long as we manage to guarantee their protection and their preservation in the wild. Each disappearing population will take with it unretrievable glimpses of the evolutionary history of our species,” Professor Lameira concluded.



The study is published in the journal <a href="https://www.nature.com/articles/s41559-022-01689-z">Nature Ecology and Evolution</a>.&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Ape “vocabularies” are shaped by social interaction

A new study led by the University of Warwick has...

New research from <a href="https://healthy.kaiserpermanente.org/">Kaiser Permanente</a> has found that coronavirus substantially increases the risk of severe complications in pregnancy. The experts analyzed records for more than 40,000 pregnant women during the first year of the <a href="https://www.earth.com/news/covid-related-deaths-are-much-higher-than-the-official-count/">COVID-19</a> pandemic.&nbsp;



The study revealed that the 1,332 patients who tested positive for coronavirus during pregnancy had more than double the risk of negative outcomes, such as preterm birth or blood clot.&nbsp;



Pregnant women who had been diagnosed with COVID-19 were also much more susceptible to severe maternal morbidity, which includes conditions such as acute respiratory distress syndrome and sepsis.



Study lead author Dr. Assiamira Ferrara is a senior research scientist and associate director of the women’s and children health section in the Kaiser Permanente Division of Research.



“These findings add to the growing evidence that having COVID-19 during pregnancy raises risks of serious complications,” explained Dr. Ferrara.



“Coupled with the evidence that the COVID-19 vaccines are safe during pregnancy, these findings should aid patients in understanding the risks of perinatal complications and the need for vaccination. This study supports the recommendation for vaccination of pregnant individuals and those planning conception.”



According to Dr. Ferrara, a strength of the study is that it followed a large group of diverse patients from preconception through their pregnancies to assess possible associations between perinatal complications and COVID-19 infection.



The research was focused on pregnant patients of Kaiser Permanente in Northern California who delivered babies between March 2020 and March 2021. The results showed that pregnant women who tested positive for coronavirus were more likely to be younger, Hispanic, have had multiple babies, had obesity, or lived in a neighborhood with high economic deprivation.



Coronavirus patients had twice the risk of preterm birth. This risk was elevated during early, middle, and late terms of the pregnancy. Covid infection was also associated with three times the risk of&nbsp; thromboembolism, or blood clot, and 2.5 times the risk of developing a severe maternal morbidity.



“Our study was large, diverse, and supports the need for vaccination by pregnant individuals and those who plan to get pregnant,” said co-author Dr. Mara Greenberg. “The most important thing people can do to protect themselves and their baby is to get vaccinated.”



The study is published in the journal <a href="https://jamanetwork.com/journals/jamainternalmedicine">JAMA Internal Medicine</a>.



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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

COVID doubles the risk of severe pregnancy complications

New research from Kaiser Permanente has found that coronavirus substantially...

In a new study from <a href="https://www.ecu.edu.au/">Edith Cowan University</a> (ECU), researchers have found that people who are confident in the kitchen don't just eat healthier - they also enjoy better <a href="https://www.earth.com/news/pet-ownership-has-mental-health-benefits/">mental health</a>. The research was focused on 657 individuals who took a healthy cooking course for seven weeks.&nbsp;&nbsp;



In a partnership between ECU, The Good Foundation, and Jamie’s Ministry of Food initiative, a mobile food kitchen provided cooking classes in the community and on college campuses from 2016 to 2018.



During this same time period, experts at the ECU Institute for Nutrition Research measured the program's effect on participants' cooking confidence and self-perceived mental health.



The study results revealed that individuals who took part in the healthy cooking course experienced significant improvements in general health, mental health and subjective vitality. These benefits were perceivable immediately after the program, and persisted for six months after the course.



Furthermore, the participants exhibited substantial improvements in cooking confidence. These individuals also gained the ability to easily change eating habits and overcome lifestyle barriers to healthy eating, according to the study authors. Lead researcher Dr. Joanna Rees said the study showed the importance of diet for mental health.&nbsp;



“Improving people’s diet quality can be a preventive strategy to halt or slow the rise in poor mental health, obesity and other metabolic health disorders,” said Dr. Rees.&nbsp;



“Future health programs should continue to prioritize the barriers to healthy eating such as poor food environments and time restrictions, whilst placing greater emphasis on the value of healthy eating via quick and easy home cooked meals, rich in fruit and vegetables and avoiding ultra-processed convenience foods.”&nbsp;&nbsp;



Prior to this study, experts at the ECU Institute for Nutrition Research had identified a link between eating more fruits and vegetables and improved mental health in the long term. This indicates that the healthy cooking students were not just feeling better because they became more confident in the kitchen, but also because they were eating so much healthier.&nbsp;



On the other hand, individuals who had not changed their diet after completing the program had still reported improved mental health. “This suggests a link between cooking confidence and satisfaction around cooking, and mental health benefits,” said Dr. Rees.&nbsp;



The study is published in the journal <a href="https://www.frontiersin.org/journals/nutrition">Frontiers in Nutrition</a>.



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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

Healthy cooking linked to improved mental health

In a new study from Edith Cowan University (ECU), researchers...

Changing climate, with associated increasing global temperatures and more severe droughts in places, has created favorable conditions for <a href="https://www.earth.com/news/wildfires-will-increase-by-50-percent-by-the-end-of-the-century/">wildfires</a> over the past few decades. Large-scale fires in Australia, Brazil and California in the past two years have highlighted this phenomenon and drawn the world’s attention to the plight of forests around the world.&nbsp;&nbsp;



Studies have shown changing fire dynamics across the globe due to both changes in climate and changes in land use by humans. However, when scientists try to assess the global trends in fire-related forest loss, they are faced by a lack of globally consistent methodology in measuring this variable, as well as the problem that some satellite maps used have a course resolution (375&nbsp;m for VIIRS and 1&nbsp;km for MODIS)&nbsp;that does not allow discrimination between forest wildfires and burns on agricultural lands at the forest fringes.&nbsp;



“In the case of the Amazonian fires of 2019, there was no clear information on what exactly was burning: forests or previously deforested areas that had been converted to pasture and cropland,” explained Dr Alexandra Tyukavina, of the University of Maryland.&nbsp;“Even I, as a geographer, was terrified reading all the headlines that seemed to imply that the last patch of the Amazonian rainforest was on fire, which was not true.”



No high-resolution global satellite-based assessment of forest loss due to fire, employing consistent definitions and methods across biomes, has been available to date. In order to address this information gap, Tyukavina and her colleagues have developed the first ever 30m resolution (a 30 meter pixel represents a square patch of the land with a 30m side) global map of forest loss due to wildfires between 2001 and 2019. The study was published recently in&nbsp;<a href="https://www.frontiersin.org/journals/remote-sensing">Frontiers in Remote Sensing</a>.



In their study, they defined forest loss as the removal of woody vegetation over five meters in height, and distinguished between forest loss due to fires and forest loss due to other factors such as agriculture (mechanical clearing of forests), floods, and hurricanes.&nbsp;They report the annual estimates of forest loss due to fire, and their trend between 2001 and 2019, globally and by climate domain within each region/continent. In addition, they analyzed trends in fire loss in tropical primary forests separately, because these forests have a high biodiversity and ecosystem service value.



“We have been producing the global forest loss map and updating it annually since 2013, but we did not attribute drivers of forest loss. This means that we did not know what exactly happened to forests (fire or mechanical removal) and we didn't know whether this forest loss was temporary (for example, due to slash-and-burn farming) or long-term (deforestation),” said Tyukavina.



The new map with its more refined scale, showed that the proportion of global forest loss due to fires between 2001 and 2019 is 26 to 29 percent, which is higher than what was previously estimated. It showed relatively consistent increases in wildfires across the globe, with boreal forests having the highest proportion of forest loss (69–73 percent), followed by subtropical forests (19–22 percent), temperate forests (17–21 percent), and tropical forests (6–9 percent).



The map shows that the area of fire-related forest loss is increasing globally, but particularly within the tropical primary forests of Africa and Latin America.&nbsp; Primary forests are forests in their ‘final form’; fully grown, dense, and bursting with biodiversity. They are extremely important for the environment due to their biodiversity richness and the ecosystem services they provide.



“The map is annual, and not near-real-time, so it won't help monitoring forest fires in real time but will be useful as a historic baseline regarding the rates of forest loss due to fire,” said Tyukavina.



The researchers propose to use the map as a tool for forest management, policy and conservation program development, and climate modeling. They state that understanding more about the exact drivers of forest fires will help from the standpoint of carbon accounting and land management.



“Our new map is a good indicator of where the fires resulting in the loss of forest canopy have happened in the last two decades, and could help guide future finer-detail national, regional and local-scale studies, or tune coarser-scale global models,” concluded Tyukavina.



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

One-third of global forest loss has been caused by wildfires

Changing climate, with associated increasing global temperatures and more severe...

<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=2E0mn5mTvhQ
</div><figcaption class="wp-element-caption">'Death Star' moon Mimas conceals a 15-million-year-old ocean that scientists never expected.</figcaption></figure>



<h2 class="wp-block-heading" id="h-hidden-waters-beneath-ancient-craters">Hidden waters beneath ancient craters</h2>



Scientists have made a startling discovery that challenges everything we thought we knew about <a href="https://www.earth.com/news/saturn-moon-mimas-has-remarkably-young-ocean/" target="_blank" rel="noreferrer noopener">Saturn's moon Mimas</a>. Beneath the heavily cratered surface that earned it the nickname "Death Star" lies a global ocean that formed just 5 to 15 million years ago—a remarkably young age by cosmic standards.



<h2 class="wp-block-heading" id="h-cassini-data-reveals-orbital-secrets">Cassini data reveals orbital secrets</h2>



The discovery, led by Dr. Valéry Lainey of the <a href="https://observatoiredeparis.psl.eu/" target="_blank" rel="noreferrer noopener">Observatoire de Paris</a>, emerged from careful analysis of <a href="https://www.nasa.gov" target="_blank" rel="noreferrer noopener">NASA</a>'s Cassini spacecraft data. By studying subtle irregularities in Mimas's orbit around Saturn, researchers detected the gravitational signature of liquid water hidden 20 to 30 kilometers beneath the moon's icy shell.



<h2 class="wp-block-heading" id="h-an-unlikely-ocean-world">An unlikely ocean world</h2>



At only 400 kilometers in diameter, Mimas seemed like the least likely candidate to harbor a subsurface ocean. Unlike other ocean moons such as Europa and Enceladus, which show clear surface signs of internal activity, Mimas displays no obvious hints of the liquid water beneath its ancient, crater-scarred exterior.



"Mimas is a small moon, and its heavily cratered surface gave no hint of the hidden ocean beneath," explained Dr. Nick Cooper from <a href="https://www.qmul.ac.uk/" target="_blank" rel="noreferrer noopener">Queen Mary University of London</a>, a study co-author.



<h2 class="wp-block-heading" id="h-implications-for-astrobiology">Implications for astrobiology</h2>



The ocean's recent formation makes Mimas a prime target for studying how oceans develop and potentially support life. This discovery adds another member to the exclusive club of ocean worlds in our solar system, each offering unique insights into the conditions necessary for habitability.



The research, published in <a href="https://www.nature.com/" target="_blank" rel="noreferrer noopener">Nature</a> journal, demonstrates how advanced orbital analysis can reveal hidden features of celestial bodies, opening new possibilities for understanding ocean formation throughout the cosmos.



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Scientists discover unexpected young ocean on Saturn's cratered moon Mimas

https://www.youtube.com/watch?v=2E0mn5mTvhQ 'Death Star' moon Mimas conceals a 15-million-year-old ocean that...

<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=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.

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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.

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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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https://youtu.be/Ug657J67iEo?si=w96YjGMsg939LD_3
</div></figure>



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

[sendtonews key="0ynNMYkMKa-2340414-12187" 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> (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;



---



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.

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" 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.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

[sendtonews key="3upvlAaHgO-2256633-12187" 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> 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



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.

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?

[sendtonews key="X0f6OHYoI4-2310561-12187" 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.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

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

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;



---



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

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

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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"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

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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

[sendtonews key="qjvhBOBnY8-2426650-12187" 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.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



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 rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

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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

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

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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