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...

A recent study led by the <a href="https://www.unimelb.edu.au/">University of Melbourne</a> suggests that the pledges on curbing greenhouse gas emissions from the <a href="https://ukcop26.org/">COP26</a> climate change summit in Glasgow could help limit global temperature rises to below 1.9C. Plans by India (the world’s third biggest greenhouse gas emitter) to reach net zero emissions by 2070 will likely make an important contribution to reaching climate targets.



According to Alok Sharma, the president of COP26, these new commitments from a large number of countries represent important progress, but are still insufficient to reach the goal set in 2015 by the Paris Agreement to limit global warming to less than 1.5C above pre-industrial temperatures.&nbsp;



Many scientists warn that if temperatures rise above the 1.5C target, some impacts of climate change are likely to become irreversible, including small islands being flooded and extreme weather events increasing in frequency.



In order to stay within the 1.5C threshold, global greenhouse emissions should decrease about 45 percent by 2030, which, as many important speakers at the Glasgow summit admitted, will likely not happen. However, if by 2050 major greenhouse emitters manage to meet the net zero target, there is a high change that global temperatures will not surpass the 2C limit.



“It’s still a huge if, because many of the net zero targets – including the net zero target from India – are conditional on international support,” said study lead author Malte Meinshausen, a climate scientist at the University of Melbourne. “We need to see that happen.”



“Any progress is welcome but we need extreme caution about declaring success on the basis of vague and often vacuous net zero targets three or more decades hence,” added Edward Miliband, the Shadow Secretary of State for Business, Energy and Industrial Strategy of the UK.&nbsp;



“For example, Australia has a 2050 net zero target but its 2030 plans are in line with 4 degrees of warming. There is a reason for the focus on halving emissions this decisive decade. It reflects the urgency, clarity and specificity we need to keep 1.5C alive. We cannot allow political leaders to shift the goalposts."



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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

Despite progress at COP26, climate target of 1.5C is out of reach

A recent study led by the University of Melbourne suggests...

With lockdowns being lifted in many parts of the world, a large number of <a href="https://www.earth.com/news/dogs-and-cats-test-positive-for-alpha-variant-of-sars-cov-2/">dogs</a> left home alone by their owners face psychological problems such as separation anxiety. 



While it may seem that dogs who are left home with other canine companions would feel less lonely and anxious, a new study led by the Academy for Animal Naturopathy in&nbsp;Dürnten, Switzerland has found that the opposite is usually true. Dogs appear to be even more anxious when left home with other dogs.



“Many dogs are left alone at home by their owners for several hours on a daily basis. This practice is known to be a possible source of complication in dog keeping. Behaviorists and veterinarians are frequently consulted due to excessive vocalizations, destructive behavior and house-soiling of dogs left alone by their owners,” explained the study authors.&nbsp;



“These observations are thought to be symptoms of a disorder which most authors refer to as separation anxiety or separation related behavior.”&nbsp;



Signs of separation anxiety in dogs include barking, howling, increased physical activity, digging, scratching, disruptive chewing, or excessive urination and defecation.



The scientists videotaped 32 dogs in single-dog households and 45 dogs in multi-dog households that were left alone as part of their usual routine. Surprisingly, intense physical activity was higher in multi-dog households, primarily in the first hours after separation.&nbsp;



“We observed more separation-related behavior in multi-dog households,” reported study lead author Gerrit Stephan, a researcher at the Academy for Animal Naturopathy.



“It's a common misconception – and often given as poor advice – that a dog with separation-related anxiety will fare better and show fewer stress responses if another dog is added to the household,” said Natalie Waran, a professor of Animal Welfare at the <a href="https://www.eit.ac.nz/">Eastern Institute of Technology</a> in New Zealand.&nbsp;



“This doesn't address the underlying problem for the dog with separation anxiety, and it often results in another dog showing anxious or excitable behavior. The key is to understand the causes of problem behavior to be able to manage or treat those effectively.”&nbsp;&nbsp;



Further research is needed in order to better understand the reasons why separation anxiety appears to be stronger in multi-dog households and to open therapeutic pathways for pets struggling with emotional issues.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0168159121002501#!">Applied Animal Behavior 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

Dogs get more separation anxiety when left with another animal

With lockdowns being lifted in many parts of the world,...

Among the things that are often listed as making us “<a href="https://www.earth.com/news/scientists-have-named-a-new-human-ancestor/">human</a>” are tool use, advanced problem solving-capabilities, even religion. However, one thing above all enables the development of humankind - language. Now, scientists are doing their level best to unlock the mystery of how the brain turns our thoughts into words - even across different systems of language.&nbsp;



“Our brains are capable of engaging in multiple languages," said Sarah Phillips from <a href="https://www.nyu.edu/">New York University</a>. "Languages may differ in what sounds they use and how they organize words to form sentences. However, all languages involve the process of combining words to express complex thoughts.”&nbsp;



“Bilinguals show a fascinating version of this process - their brains readily combine words from different languages together, much like when combining words from the same language," said Liina Pylkkänen.



Phillips and Pylkkänen are the authors of a new study examining the way the brain of bilingual people operates, especially when two bilinguals converse.&nbsp;



To accomplish this, the researchers studied a group of people who spoke both English and Korean. Then they performed tests on words that accurately described pictures - the words were sometimes English, and sometimes Korean. Then, the experts used magnetoencephalography to measure the portions of the brain that were active during the exercise.



The results? The brain’s left anterior lobe&nbsp; was able to formulate meaning out of the word-picture associations, even when switching between languages. 



"Our results reveal one neural substrate that may underlie the intuitive ease of language switching: a combinatory mechanism in left anterior temporal cortex that can take mixed-language vocabulary as its input with no sensitivity to language switching," wrote the study authors.



Because there’s not an extra “step” involved in the multi-lingual exchanges, this suggests that bilingual people have a distinct neurological ability to combine and interpret different languages.



“Earlier studies have examined how our brains can interpret an infinite number of expressions within a single language," said Phillips. "This research shows that bilingual brains can, with striking ease, interpret complex expressions containing words from different languages.”



The study is published in the journal <a href="https://www.eneuro.org/">eNeuro</a>.



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By <a href="http://mailto:rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Bilingual brains can switch between languages with ease

Among the things that are often listed as making us...

Instances of animals being infected with SARS-CoV-2 (the virus that causes <a href="https://www.earth.com/news/new-evidence-that-covid-19-is-a-seasonal-infection/">COVID-19</a>) have bee)n documented from around the world. The species affected include pet dogs, cats and ferrets, zoo animals such as big cats, otters and primates, farmed mink and wild white-tailed deer. 



A new study reports the first instav7thnce of pet infection by the alpha&nbsp;variant of SARS-CoV-2, which&nbsp;was first detected in southeast England and is commonly known as the UK variant or B.1.1.7. This variant rapidly outcompeted pre-existing variants in England due to its increased transmissibility and infectivity.&nbsp;



Two cats and one dog returned positive PCR tests for this variant of the Coronavirus, while two additional cats and one dog displayed antibodies to the virus two to six weeks after they had developed signs of cardiac disease. All of the pets had suffered an acute onset of cardiac disease, including severe myocarditis (inflammation of the heart muscle).



Many of the owners of these pets had also tested positive for COVID-19, and had developed respiratory symptoms several weeks before their pets became ill.



“Our study reports the first cases of cats and dogs affected by the COVID-19 alpha variant and highlights, more than ever, the risk that companion animals can become infected with SARS-CoV-2,” said lead author Luca Ferasin,&nbsp;DVM, PhD, of The Ralph Veterinary Referral Centre, in the UK.



“We also reported the atypical clinical manifestations characterized by severe heart abnormalities, which is a well-recognized complication in people affected by COVID-19 but has never been described in pets before."&nbsp;



"However, COVID-19 infection in pets remains a relatively rare condition and, based on our observations, it seems that the transmission occurs from humans to pets, rather than vice versa."



The study is published by <a href="https://onlinelibrary.wiley.com/">Wiley</a> in the journal <a href="https://bvajournals.onlinelibrary.wiley.com/journal/20427670">Veterinary Record</a>.



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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

Dogs and cats test positive for alpha variant of SARS-CoV-2

Instances of animals being infected with SARS-CoV-2 (the virus that...

According to a recent survey conducted by the journal <a href="https://www.nature.com/articles/d41586-021-02990-w">Nature</a>, two thirds of the climate scientists on the <a href="https://www.ipcc.ch/">Intergovernmental Panel on Climate Change</a> (IPCC) said that they expect the world to warm by at least 3°C, compared to pre-industrial temperatures, by the end of this century. The estimate is well beyond the <a href="https://unfccc.int/process-and-meetings/the-paris-agreement/the-paris-agreement">Paris agreement</a>’s goal to limit global warming to 1.5–2 °C.



Most of the scientists who responded to the survey expressed fear that the world is running out of time to avoid the catastrophic effects of anthropogenic climate change, and showed marked skepticism that governments will manage to slow the pace of global warming - despite the political promises they made at the Paris agreement in 2015.



Eighty-eight percent of the respondents claimed that the world is experiencing an enormous climate crisis and said that they expected to witness catastrophic impact of climate change during their own lifetimes.&nbsp;



Half of the participants said that global warming is causing them to reconsider major life decisions, such as where to live and whether to have children or not, and over 60 percent reported that they experience <a href="https://www.earth.com/news/young-people-are-increasingly-anxious-over-climate-change/">climate-induced anxiety</a>, grief, and other psychological distress.&nbsp;



“The pessimism expressed by some IPCC panelists underscores the vast gulf between hopes and expectations for the climate summit that began this week in Glasgow. In advance of the meeting, the United States, the European Union, China and others have announced new plans to curb greenhouse-gas emissions, although scientific analyses suggest those plans still fall well short of the Paris goals."&nbsp;



"Over the next two weeks, countries will formalize and perhaps even strengthen those commitments. But making them a reality will require as-yet-unprecedented political mobilization at the national level once leaders return home,” the survey authors warned.



Fortunately, a pessimistic outlook does not seem to completely extinguish hope that the situation could improve. Two-thirds of the scientists involved in the survey claimed that they are persistently engaging in advocacy related to climate change, by promoting science through speeches, publications, and videos, contacting lawmakers or government officials to advocate specific climate policies, signing letters or petitions calling for action, or participating in demonstrations.



As Charles Koven, a climate scientist at <a href="https://www.lbl.gov/">Lawrence Berkeley National Laboratory</a> in California, put it, “I believe that the majority of people really do care about the future, and that it is possible for governments to coordinate and avoid the worst climate outcomes.”



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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

Is there still time to avoid catastrophic climate outcomes?

According to a recent survey conducted by the journal Nature,...

In many animal species, <a href="https://www.earth.com/news/blue-orchard-bees-respond-to-fires-by-producing-more-females/">females</a> apparently choose male mates based on the presence of adornments, such as large antlers or bright colors, or the use of ritualized displays that in some way indicate a male’s fitness. This is known as sexual selection and is thought to be responsible for the presence of extravagant and unusual male characteristics.&nbsp;



But when the pool of possible mates is limited, females who are too choosy run the risk of ending up with no partner and no possibility of reproducing. The risks associated with female choosiness were the subject of a recent study by Wolfgang Forstmeier of the Max Planck Institute for Ornithology in Germany, and colleagues, who used populations of captive zebra finches (Taeniopygia guttata) to test their hypotheses.



Zebra finches are socially monogamous songbirds that have regionally distinct songs. Females prefer to select mates that have the same song dialect.&nbsp;



The researchers capitalized on this situation and set up 10 aviaries, each containing 12 male and 12 female finches from the two different dialect lineages. In each captive breeding colony, one-third of the females (4 birds) could choose from two-thirds (8 birds) of the males that shared the same dialect. This was considered to be a situation of relaxed competition as there was an excess of males from which the 4 females could select a suitable mate.&nbsp;



However, in each aviary the remaining two-thirds of females (8 birds) had only one-third of the males (4 birds) that shared their song dialect. This was thus a situation of high competition as these females had a shortage of preferred males from which to select a mate. They could either choose a male with a different song dialect or choose not to breed at all.



The researchers hypothesized that females that experienced high competition for mates would have less reproductive success (measured in terms of offspring that reached independence). They also theorized that these females would lay fewer eggs and start egg-laying later – because they would be busy competing for mates.



The results showed that 31 percent of females in the high-competition treatment chose to pair with a male of a different song dialect, while 26 percent refused to settle for this and remained unpaired throughout the experiment. The researchers termed these unpaired females “wallflowers.”



The surprise came, however, when it turned out that the “wallflowers” produced, on average, the same number of eggs and successful fledglings as the breeding pairs. It seems that there was no shortage of mating opportunities between unpaired females and paired males.&nbsp;



The unpaired females then chose either to build a nest and rear the young on their own, or they sneaked their fertilized eggs into the nests of pair-bonded individuals and left the chick rearing to them, like a cuckoo does.



Some previous studies have suggested that there will be a cost to a female that is too fussy when selecting a male, and that this cost (not reproducing) would act against the evolution of sexual selection as a process. However, the current study found that females who refused to pair with a male of the wrong song dialect would suffer no cost at all in terms of offspring produced.&nbsp;



In addition, unpaired females chose to mate with, and to deposit their eggs in the nests of males that had the same song dialect. With this reproductive strategy, these unpaired females were achieving the desired result even though they were not able to form pair-bonds with the preferred males.



The study is the first to quantify the fitness costs to females of being too picky. And indeed, the results indicate that, at least in zebra finches, these costs are non-existent, as long as the females are able to employ alternative reproductive strategies. This behavioral flexibility can facilitate the evolution of female choice and male sexual selection in monogamous species, the authors say.



“Our study asks how females cope with the situation that their mate preferences are difficult to satisfy," said Forstmeier. "The answer is: more successfully than we had expected.”



The study is published today in the journal <a href="https://journals.plos.org/plosbiology/">PLoS Biology</a>.



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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

Female finches can afford to be picky when selecting a mate

In many animal species, females apparently choose male mates based...

Recent neuroscientific research has found that social isolation can impact brain function in significant, and sometimes permanent ways. In a series of presentations given at <a href="https://www.sfn.org/meetings/neuroscience-2021">Neuroscience 2021</a>, the annual meeting of the Society for Neuroscience and the world’s largest conference on the brain sciences, several scientists argued that social isolation rewires the brain in complex ways, potentially leading to anxiety, depression, addiction, and other behavioral changes.



Humans are highly social creatures, who depend on social contact for their well-being. Since the COVID-19 pandemic started, loneliness caused by social isolation increased significantly, leading to multiple neurological and behavioral changes. By using animal models, neuroscientists are beginning to identify the neurological bases of solitude.



According to scientists, social isolation is associated with changes to various areas of the brain, including the prefrontal cortex, the nucleus accumbens, and the amygdala, as well as the dopamine and oxytocin systems, which are crucial for structuring patterns of social interaction. Such changes can lead to long-term deficits in social recognition, anxiety, depression, addiction to alcohol and various drugs, and weight gain.&nbsp;



“This research shows that social isolation impacts many brain regions and affects many different behaviors, resulting in increased risk for disease,” said Alexa H. Veenema, an associate professor of Neurobiology at <a href="https://msu.edu/">Michigan State University</a>. “The pandemic has had a tremendous effect on our mental health. This research will provide us with insights about which specific neural circuits mediate the behavioral effects induced by social isolation.&nbsp;We can then find ways to restore these neural circuits, counteracting the consequences of social isolation.”



According to Enrique U. Pérez-Cardona, a neuroscientist at the <a href="https://www.uprc.edu/">University of Puerto Rico at Carolina one of the best ways to mitigate the negative effects social isolation has on the brain is through regular exercise. In an experimental study, young rats which were isolated for ten days gained weight, became more anxious, and had a blunted dopamine response in their nucleus accumbens. However, rats that exercised five days a week for five weeks on a treadmill showed a significant reduction of anxiety and weight loss.</a>



Further research is needed to understand whether such findings can easily be translated to humans. Considering the widespread experience of loneliness during the COVID-19 pandemic though, there is an urgent need to better understand and prevent the long-term effects of social isolation.&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

Social isolation damages our brains

Recent neuroscientific research has found that social isolation can impact...

The Global Carbon Project has recently published its latest update. The most recent report finds that, although carbon emissions dropped by 5.4 percent in 2020 amid COVID lockdowns, an increase of 4.9 percent is predicted this year.&nbsp;



This rate of activity will nearly return emissions to pre-COVID levels, equating to the release of 36.4 billion tons of carbon in 2021. Emissions from coal and gas use are set to grow more in 2021 than they fell in 2020, but emissions from oil use remain below the 2019 levels.



In the United States and European Union, both major emitters of CO2, emissions were decreasing prior to the start of the COVID pandemic. This trend is set to continue for 2021.&nbsp;



India’s pre-COVID trend of increasing emissions is also set to continue. However, in China the response to the COVID-19 pandemic has sparked further growth in CO2&nbsp;emissions, pushed by the power and industry sectors.



The research team – including scientists from the University of Exeter, the University of East Anglia (UEA), CICERO and Stanford University – say a further rise in emissions in 2022 cannot be ruled out if road transport and aviation return to pre-pandemic levels and coal use is stable.



The report contains the following analysis of major emitters (the figures below exclude international transport, particularly aviation):



<ul><li>China: Emissions are projected to rise 4 percent compared to 2020, reaching 5.5 percent above 2019 – a total of 11.1 billion tons CO2, 31 percent of global emissions.</li><li>USA: Emissions are projected to rise 7.6 percent compared to 2020, reaching 3.7 percent below 2019 – a total of 5.1 billion tons CO2, 14 percent of global emissions.</li><li>EU27: Emissions are projected to rise 7.6 percent compared to 2020, reaching 4.2 percent below 2019 – a total of 2.8 billion tons CO2, 7 percent of global emissions.</li><li>India: Emissions are projected to rise 12.6 percent compared to 2020, reaching 4.4 percent above 2019 – a total of 2.7 billion tons CO2, 7 percent of global emissions.</li></ul>



For the rest of the world taken as a whole, fossil CO2&nbsp;emissions remain below 2019 levels.



"The rapid rebound in emissions as economies recover from the pandemic reinforces the need for immediate global action on climate change," said&nbsp;<a href="https://emps.exeter.ac.uk/mathematics/staff/pf229">Professor Pierre Friedlingstein</a> of Exeter's&nbsp;<a href="https://gsiexeter.co.uk/">Global Systems Institute</a>, who led the study.



"The rebound in global fossil CO2&nbsp;emissions in 2021 reflects a return towards the pre-COVID fossil-based economy.&nbsp;Investments in the green economy in post-COVID recovery plans of some countries have been insufficient so far, on their own, to avoid a substantial return close to pre-Covid emissions."



"It will take some time to see the full effect of the COVID-related disruptions on global CO2&nbsp;emissions," said Professor Corinne Le Quéré. "A lot of progress has been made in decarbonising global energy since the Paris Agreement was adopted in 2015, plus renewables is the only energy source that continued to grow during the pandemic."



"New investments and strong climate policy now need to support the green economy much more systematically and push fossil fuels out of the equation.”&nbsp;&nbsp;&nbsp;



The publication coincides with the meeting of the world’s leaders at COP26 in Glasgow, where they will address the climate crisis and try to commit to plans for a way forward.&nbsp;



Based on the findings in the report, atmospheric CO2&nbsp;concentration is projected to increase by 2.0 parts per million (ppm) in 2021 to reach 415 ppm averaged over the year, which represents a lower growth compared to recent years due to La Niña conditions in 2021.



If the world is to have a 50 percent chance of limiting global warming to 1.5°C, 1.7°C and 2°C, the researchers estimate the remaining "carbon budget" that can still be pumped out has now shrunk to 420 billion tons, 770 billion tons and 1,270 billion tons respectively. This is equivalent to a timeframe of 11, 20 and 32 years at the 2021 emission levels.



"Reaching net zero CO2&nbsp;emissions by 2050 entails cutting global CO2&nbsp;emissions by about 1.4 billion tons each year on average," said Professor Friedlingstein. “Emissions fell by 1.9 billion tons in 2020 – so, to achieve net zero by 2050, we must cut emissions every year by an amount comparable to that seen during COVID.”



"This highlights the scale of the action that is now required, and hence the importance of the COP26 discussions," said Friedlingstein.



The 16th&nbsp;annual Global Carbon Budget is published as a preprint in the journal Earth System Science Data, where it is currently open for review. The data presented on carbon dioxide emissions and how they are partitioned between land, atmosphere and ocean, are updated every year to keep track of CO2 levels globally.&nbsp;



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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

Global carbon emissions rebound close to pre-COVID levels

The Global Carbon Project has recently published its latest update....

The <a href="https://www.earth.com/news/a-cheap-antidepressant-may-reduce-severe-covid-19-disease/">COVID-19</a> pandemic changed our lives and lifestyles in many ways. Established routines were disrupted by school closures, remote working, enforced isolation, stay-at-home requirements, travel restrictions and social distancing. Some of us benefited from extra time at home during lockdowns, while others had to devote more of their time to child care and housework.



In a new study from the <a href="https://www.cam.ac.uk/">University of Cambridge</a> and Queen Mary University of London, a team of economists analyzed daily lifestyle changes during pandemic lockdowns in the UK.



The experts collected data from detailed, retrospective time-use diaries kept by 766 UK citizens from across the social spectrum during three points in time: the last month of normality (February 2020), the first lockdown (May 2020), and the last lockdown in March, 2021. &nbsp;&nbsp;



The researchers considered four categories of activity and calculated the quantity of time spent by each individual occupied in each of the activity areas: employment (excluding commutes); “housework” (from shopping to childcare); leisure (e.g. hobbies or home entertainment); subsistence (meals, sleeping, personal care). They also assessed the quality of time use by focusing on factors that affect an individual’s experience of an activity, such as with whom the activity was shared and the time when the activity took place.



The results showed that, during lockdowns, individuals spent less time on employment-related activities and more time on housework. These effects were most pronounced for individuals with young children. In addition, compared with pre-pandemic times, fewer individuals were employed and this particularly affected women with young children, who were significantly less likely to be employed.&nbsp;



For families with young children, parents who were employed spent an average of 43 minutes a day less on their paid job in the first lockdown, and 32 minutes less in the third, when compared with pre-pandemic times. For those without young children, there was an average decrease of 28 minutes and 22 minutes a day on paid work, respectively.



The study also exposed a gender bias in terms of changes to routine. Women with young children spent around an hour less on paid work a day than men and women without young children. During the first lockdown, the average time women spent on housework increased by 28 minutes a day, while for men the average time spent on subsistence activities (e.g. sleeping and eating) increased by 30 minutes.&nbsp;



During this year’s lockdown, women spent an extra hour doing housework, and mothers of young children did 67 minutes more housework a day than fathers did. In addition, only women saw an increase in cooking and cleaning activities (time spent on caring duties was spread across genders).



The study also showed that parents often forfeited leisure time. Living with young children at home was associated with a decrease in leisure activities of almost an hour a day in both lockdowns. Those without young children actually experienced more leisure time – around an extra hour a day – but most of this was spent alone.&nbsp;



When the researchers assessed the quality of time spent during lockdown – the self-reported “enjoyment” of given activities – they found that this extra time spent alone was less pleasurable to people and contributed to negative feelings concerning the effects of lockdowns.&nbsp;



An additional factor that reduced the pleasure of time spent was the increase in work-related demands that occurred outside usual working hours. The third lockdown saw around 20 percent of individuals spend more time working unusual hours compared to the pre-pandemic period, which reduced the reported enjoyment of their day overall. This was particularly pronounced in people who earned £5k a month or more. These high earners also spent less time on subsistence activities during the lockdowns.



Overall, during the third lockdown, the enjoyment of activities was about five percent lower than before the pandemic. The third lockdown certainly felt a bit more miserable than the first, according to the research.



“It is no surprise that having to do more work outside of typical working hours meant that people were substantially unhappier during the third lockdown," said study co-author Dr. Eileen Tipoe.



“And it was concerning to find that women, and especially those with young children, were disproportionately affected by lockdown – for example being less likely to be employed and the fact that only women spent more time cooking and cleaning.”



“The lockdowns resulted in drastic changes to patterns of time use, disrupting routines and blurring the distinction between work and family life,” said co-author Dr. Ines Lee. “We have hopefully seen the end of lockdowns, but our study holds lessons for hybrid working, as splitting time between home and office becomes more common.”



“Employers should promote better work-life balance in the post-pandemic world. This could include limits on emails outside working hours, home-working schedules that suit parents, and options for younger workers left isolated by reduced in-person networking." &nbsp;



The study is published in the journal <a href="https://journals.plos.org/plosone/">PLOS ONE</a>.



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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

Lockdowns disrupted work-leisure balance, especially for moms

The COVID-19 pandemic changed our lives and lifestyles in many...

A recent study led by the <a href="https://www.mpi-bremen.de/en/Home.html">Max Planck Institute for Marine Microbiology</a> has discovered new species of <a href="https://www.earth.com/news/birds-pick-up-new-gut-bacteria-as-they-travel/">bacteria</a> that live inside the roots of seagrasses. These bacteria are in a symbiotic relationship with the seagrasses, converting pure nitrogen (N2) into substances that the plants can use in order to thrive.&nbsp;



Seagrasses are widespread in coastal regions of both temperate and tropical seas, covering up to 600,000 square kilometers (approximately the area of France). They are home to numerous organisms, including endangered species such as seahorses, turtles, or manatees, and act as a nursery ground for a large variety of fish species. Furthermore, they protect coastlines form erosion caused by storms, and capture millions of tons of carbon dioxide each year.



For most of the year, the habitat of seagrasses is poor in nutrients. Although nitrogen is present in the seas in its elemental form, it needs to be transformed in order for the plants to be able to use it as a nutrient. Through state-of-the-art microscopy techniques and genomic and transcriptomic analyses, an international team of researchers has identified and provided detailed descriptions of the symbiotic bacteria that help these plants transform pure nitrogen into nutrients.



“It was assumed that the so-called fixed-nitrogen for the seagrasses comes from bacteria that live&nbsp;around&nbsp;their roots in the seafloor,” explained study lead author Wiebke Mohr, a researcher at the Max Plank Institute. “We now show that the relationship is much closer: the bacteria live&nbsp;inside&nbsp;the roots of the seagrass. This is the first time that such an intimate symbiosis has been shown in seagrasses. It was previously only known from land plants, especially agriculturally important species such as legumes, wheat, and sugar cane.”



Dr. Mohr and her colleagues named these newly discovered bacteria Celerinatantimonas neptuna, after their host, the neptune grass (Posidonia). Relatives of these bacteria have previously been found in association with seaweeds. &nbsp;“When the seagrasses moved from land to sea about 100 million years ago, they probably adopted the bacteria from the seaweeds,” Mohr speculated. “They virtually copied the system that was highly successful on land and then, in order to survive in the nutrient-poor seawater, acquired a marine symbiont.”&nbsp;



“Our next step is to study these new bacteria in more detail. We want to isolate them in the laboratory to further investigate how the symbiosis works and how it developed,” Mohr concluded.



The study is published in the journal <a href="https://dx.doi.org/10.1038/s41586-021-04063-4">Nature</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

Symbiotic bacteria provide nutrients to seagrasses

A recent study led by the Max Planck Institute for...

Blue whales are commonly known to be the world’s largest mammal, belonging to the family of baleen whales. These whales eat an enormous amount of food and contribute to <a href="https://www.earth.com/news/upper-ocean-layer-contains-24-trillion-pieces-of-microplastics/">ocean</a> health by doing so, and a new study suggests that the massive creatures are eating even more than what has been documented.



A team of researchers at the <a href="https://www.si.edu/">Smithsonian</a> National Museum of Natural History has concluded that baleen whales eat around three times the amount of food that was previously estimated. This means that the number of nutrients they excrete, and thus contribute to ocean ecosystems, is far greater than initially expected.



The findings are providing key insights into the importance of conserving whale populations to maintain ocean health.&nbsp;



“Our results say that if we restore whale populations to pre-whaling levels seen at the beginning of the 20th century, we’ll restore a huge amount of lost function to ocean ecosystems,” explained study lead author Nicholas Pyenson.



Pyenson’s research team tracked 321 whales from seven different species across the Atlantic, Pacific, and Southern oceans, collecting data based on their food intake between 2010 and 2019.&nbsp;



Drone photography was used to measure the length of each individual to accurately estimate its body mass and thus the amount of water it filtered with each mouthful. In addition, echo-sounding technology was used to measure the density of prey species within the local waters.



Previous estimates suggested that whale populations within the California Current Ecosystem required around two million metric tons of food annually, but the new data suggests that this is actually the amount that is required for each individual species population of whales.



In addition to studying prey consumption, the researchers also calculated the amount of nutritious iron that would recirculate in the ecosystem through whale feces because of the new estimates. Using prior research, they discovered that large whales in the Southern Ocean recycle around 1,200 metric tons of iron annually, providing around 10 million times more iron found in Antarctic Seawater.



The findings led researchers to model what the marine ecosystem would look like a century ago, prior to mass whale slaughtering. The model predicted that Southern Ocean whales consumed around 430 million metric tons of krill annually in the early 20th century, a number that represents double the amount of krill found in the Southern Ocean today. Consequently, 20th-century whales would have produced 12,000 metric tons of iron annually, which is ten times the current amount.&nbsp;



Overall, the study concluded that restoring whale populations could have a highly beneficial impact on lost marine productivity, boosting the amount of carbon dioxide that is taken up by phytoplankton and thus helping to mitigate global warming.



“Our results suggest the contribution of whales to global productivity and carbon removal was probably on par with the forest ecosystems of entire continents, in terms of scale,” explained Pyenson. “That system is still there, and helping whales recover could restore lost ecosystem functioning and provide a natural climate solution.”



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



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By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Large whales make a major contribution to ocean health

Blue whales are commonly known to be the world’s largest...

The dramatic weather events that we experience today are caused by relatively small increases in global <a href="https://www.earth.com/news/coastal-ecosystems-are-disrupted-by-small-temperature-changes/">temperatures</a>. In the distant past, during the so-called “hothouse periods,” the Earth was 20 to 30 degrees Fahrenheit hotter than today.&nbsp;



A new study led by <a href="https://www.seas.harvard.edu/">Harvard John A. Paulson School of Engineering and Applied Sciences</a> (SEAS) has found that during such epochs of extreme heat, the Earth may have experienced cycles of dryness followed by massive rainstorms, causing tremendous amounts of rain in a short period of time.



“If you were to look at a large patch of the deep tropics today, it’s always raining somewhere,” said study lead author Jacob Seeley, a postdoctoral fellow in Environmental Science and Engineering at SEAS.&nbsp;



“But we found that in extremely warm climates, there could be multiple days with no rain anywhere over a huge part of the ocean. Then, suddenly, a massive rainstorm would erupt over almost the entire domain, dumping a tremendous amount of rain. Then it would be quiet for a couple of days and repeat.”



By using an atmospheric model, Dr. Seeley and his supervisor, Robin Wordsworth, a professor of Environmental Science and Engineering at SEAS, simulated what would happen if the Earth’s sea surface temperature would increase to 130 degrees Fahrenheit.&nbsp;



They discovered that when the air near the surface becomes extremely hot, a barrier preventing convective clouds from rising into the atmosphere and forming rain clouds is created and all evaporation gets stuck in the near-surface atmosphere.&nbsp;



At the same time, clouds form in the upper atmosphere and the rain produced by those clouds evaporates before reaching the surface. However, after several days, the evaporative cooling from the rainstorms in the upper atmosphere erodes the barrier, triggering huge deluges.



“It’s like charging a massive battery,” explained Dr. Seeley. “You have a ton of cooling high in the atmosphere and a ton of evaporation and heating near the surface, separated by this barrier. If something can break through that barrier and allow the surface heat and humidity to break into the cool upper atmosphere, it’s going to cause an enormous rainstorm.”



“This study has revealed rich new physics in a climate that is only a little bit different from present-day Earth from a planetary perspective. It raises big new questions about the climate evolution of Earth and other planets that we’re going to be working through for many years to come,” concluded Professor Wordsworth.



The study is published in the journal <a href="https://dx.doi.org/10.1038/s41586-021-03919-z">Nature</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

When it rained on ancient Earth, it poured

The dramatic weather events that we experience today are caused...

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



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



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



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



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



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



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



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

Is chocolate the next nutritional powerhouse?

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

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

[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;



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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.

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;



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



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

Interactive map of the universe includes 200,000 galaxies

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

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