Recreational activities on mountain trails are pushing large carnivores like grizzly bears and wolves away from their native habitats, even when those trails lie hundreds of meters from where the animals roam. 



A new study from the <a href="https://www.ualberta.ca/en/index.html" target="_blank" rel="noreferrer noopener">University of Alberta</a> highlights the need for improved land management practices that allow people and wildlife to peacefully coexist. This issue is particularly pressing in the Bow River Valley, long recognized as a natural corridor linking the prairies to the Continental Divide.



Over the past 15 years, a team of researchers led by Peter Thompson set up camera traps at more than 1,600 sites in the Bow River Valley and surrounding areas. These traps were in place between 2007 and 2022, capturing over a million images of humans and tens of thousands of images of <a href="https://www.earth.com/news/grizzly-bears-help-huckleberries-thrive-in-a-changing-climate/" target="_blank" rel="noreferrer noopener">grizzly bears</a> and wolves. 



The scientists then used statistical models to assess the relationship between human activity and carnivore presence on the landscape.



<h2 class="wp-block-heading" id="h-human-recreation-and-large-carnivores-nbsp">Human recreation and large carnivores&nbsp;</h2>



Upon examining the images and activity patterns, the researchers discovered a significant disturbance effect from busy trails, extending far beyond the immediate path.&nbsp;



The results showed that wolves and bears did not merely avoid the immediate vicinity of high-traffic areas; they stayed away from locations hundreds of meters away as well.



Thompson, formerly a postdoctoral fellow with Colleen Cassady St. Clair in the Department of Biological Sciences at the University of Alberta, is now a postdoctoral fellow at <a href="https://www.sfu.ca/" target="_blank" rel="noreferrer noopener">Simon Fraser University</a>.



“We initially thought bears might use hiking trails as efficient routes when humans weren’t around, but they actually avoid these areas altogether,” said Thompson.



“Our results show that human recreation has significant effects on wildlife, substantially influencing their behaviour even hundreds of meters away from the trail.”



<h2 class="wp-block-heading" id="h-widespread-displacement-of-large-carnivores-nbsp">Widespread displacement of large carnivores&nbsp;</h2>



For grizzly bears, half of the displacement effect from high-use trails remained in effect up to 300 meters from the trail. For wolves, this displacement was observed up to 600 meters away. Thompson noted that the phenomenon is considerably more extensive than was previously believed.



“When trails become busier, people may not realize the extent to which they are disrupting wildlife movement and habitat security,” Thompson added.&nbsp;



This finding demonstrates that outdoor enthusiasts using high-traffic trails, especially in popular regions, could unknowingly be displacing wolves and bears from substantial parts of their natural habitat.



<h2 class="wp-block-heading" id="h-effects-of-recreation-on-wolves-nbsp">Effects of recreation on wolves&nbsp;</h2>



While grizzly bears are visibly impacted by busy trails, the displacement effect was even more pronounced for <a href="https://www.earth.com/news/gray-wolves-are-a-crucial-component-of-the-american-west/" target="_blank" rel="noreferrer noopener">wolves</a>. Their avoidance of human activity at distances of up to 600 meters likely relates to their year-round activity cycle, which intersects with winter recreation such as skiing and snowmobiling.&nbsp;



This further highlights how multiple forms of recreation can compound the stress on top predators.



“Wolves are even more affected by human recreation than grizzly bears, and they are active year-round, coinciding with winter recreational activities,” said St. Clair, Thompson’s former supervisor.&nbsp;



“This research highlights the critical need to manage human use in a way that allows people to share the landscape with these wary predators.”



<h2 class="wp-block-heading" id="h-mitigating-the-impacts-on-large-carnivores-nbsp">Mitigating the impacts on large carnivores&nbsp;</h2>



The Bow River Valley is particularly significant for wildlife, functioning as a key passageway for many species.&nbsp;



Shifts in animal movement due to human traffic on trails could compromise the valley’s role as a corridor for genetic exchange and resource access.&nbsp;



If large carnivores are consistently deterred from these areas, the consequences could include altered feeding patterns, reduced breeding success, and changes in <a href="https://www.earth.com/news/danger-zones-climate-change-is-altering-predator-prey-dynamics/" target="_blank" rel="noreferrer noopener">predator-prey dynamics</a>.



Land managers in this region may consider strategies such as creating buffer zones, limiting trail access during peak activity times, or issuing guidelines that reduce disturbance in critical wildlife areas.&nbsp;



Such steps might help maintain the valley’s ecological function and ensure that grizzlies, wolves, and other species can continue to move freely.



<h2 class="wp-block-heading" id="h-need-for-thoughtful-recreation-planning">Need for thoughtful recreation planning</h2>



The paper’s authors emphasize that as recreational use of mountain trails grows, the effects on wildlife will likewise increase.&nbsp;



Raising awareness about how trail use displaces animals, even far from the trail itself, could encourage more responsible behavior among outdoor enthusiasts.&nbsp;



Measures such as seasonal trail closures, visitor education programs, and designated wildlife corridors could help minimize the disruption to grizzly bears, wolves, and other sensitive species.



The findings in the Bow River Valley also reflect broader challenges faced worldwide as conservation areas strive to balance human recreation with wildlife protection.&nbsp;



By taking preemptive steps - whether through trail design, user quotas, or educational outreach - policymakers and conservation managers can better safeguard critical habitats for large carnivores and foster a more harmonious coexistence between people and nature.



<h2 class="wp-block-heading" id="h-reevaluating-our-use-of-mountain-trails-nbsp">Reevaluating our use of mountain trails&nbsp;</h2>



This study provides actionable insights into how recreational activities influence the distribution and well-being of <a href="https://www.earth.com/news/apex-predators-can-help-restore-ecosystems-but-not-immediately/" target="_blank" rel="noreferrer noopener">apex predators</a>.&nbsp;



With wolves and bears essential to ecosystem balance, preventing their displacement has ecological significance beyond individual species.&nbsp;&nbsp;



According to Thompson, these results show that human recreation has significant effects on wildlife, and these findings are a call to reevaluate how we manage and use mountain trails.&nbsp;



Through careful planning and targeted conservation efforts, there is hope that humans and large carnivores can continue to share these magnificent landscapes for generations to come.



The study is published in the <a href="https://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2664.14837" target="_blank" rel="noreferrer noopener">Journal of Applied Ecology</a>.



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Mountain recreation displaces large carnivores from their habitats

Recreational activities on mountain trails are pushing large carnivores like grizzly bears and wolves away from their native habitats, even when those trails lie hundreds of meters from where the animals roam.  A new study from the University of Alberta highlights the need for improved land management practices that allow people and wildlife to peacefully coexist. This issue is particularly pressing in the Bow River Valley, long recognized as a natural corridor linking the prairies to the Continental Divide. Over the past 15 years, a team of...

The TP53 gene is responsible for making a protein known as p53, which helps to protect our bodies from cancer by slowing the spread of cancerous cells. Even though p53 is a promising target for cancer treatment, the protein is not very stable and breaks down rapidly within cells. In a groundbreaking new study from <a href="https://ki.se/en">Karolinska Institutet</a>, researchers have demonstrated that a spider silk protein can stabilize and strengthen p53.



The experts explain that if a cell is lacking functional p53, it quickly becomes a cancer cell that starts to divide uncontrollably. The research suggests that adding spider silk to p53 increases its ability to kill cancer cells and keep them from spreading.&nbsp;



“The problem is that cells only make small amounts of p53 and then quickly break it down as it is a very large and disordered protein,” said study last author Michael Landreh. “We’ve been inspired by how nature creates stable proteins and have used spider silk protein to stabilise p53. Spider silk consists of long chains of highly stable proteins, and is one of nature’s strongest polymers.”



In the Department of Biosciences and Nutrition at Karolinska Institutet, Jan Johansson and Anna Rising use spider silk in their research. Along with Landreh, the researchers attached synthetic spider silk protein onto the human p53 protein. When the modified protein was introduced into human cells, the cells started to produce it in large quantities.&nbsp;



The experts found that the new protein was more stable and potent than unmodified p53.&nbsp;



Electron microscopy, computer simulations, and mass spectrometry revealed that the spider silk seemed to add structure to the disordered sections of p53.



Going forward, the experts want to gain a more detailed understanding of the structure of p53, and how its various parts interact to prevent cancer. The researchers will also investigate how the more potent protein they have created with spider silk may affect cells.



“Creating a more stable variant of p53 in cells is a promising approach to cancer therapy, and now we have a tool for this that’s worth exploring,” said study co-author Sir David Lane. “We eventually hope to develop an mRNA-based cancer vaccine, but before we do so we need to know how the protein is handled in the cells and if large amounts of it can be toxic.”



Sir David Lane is one of the scientists who first discovered the p53 protein, which is referred to as the "guardian of the genome" due to its ability to stop cells with DNA damage from turning into cancer cells. Mutations of the TP53 gene are present in roughly half of all cancer tumors, representing the most common genetic change in cancer.



The study is published in the journal <a href="https://www.cell.com/structure/home">Structure</a>.



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

Spider silk can help human cells kill cancer

The TP53 gene is responsible for making a protein known...

Methane is a potent greenhouse gas, significantly contributing to <a href="https://www.earth.com/news/marine-microbe-may-help-in-the-fight-against-climate-change/">climate change</a>. For many years, scientists thought that this gas is produced only by single-celled microbes called Archaea, through the decomposition of organic matter in the absence of oxygen. However, a new study led by the <a href="https://www.mpi-marburg.mpg.de/">Max Planck Institute for Terrestrial Microbiology</a> suggests that in fact all organisms release varying degrees of methane.



When researchers from the Max Planck Institute discovered the release of methane from plants in the presence of oxygen 16 years ago, they initially doubted the results. However, once fungi, algae, and cyanobacteria were also observed to form methane under aerobic conditions, scientists have started to realize that methane formation is more widespread than initially thought. Until recently though, enzymatic activities were considered responsible for the formation of this gas. Now, researchers have shown that this process could also take place via a purely chemical mechanism, with no enzymes involved.



“This study is therefore a milestone in our understanding of aerobic methane formation in the environment,” said senior author Frank Keppler, a geoscientist at <a href="http://uni-heidelberg.de/">Heidelberg University</a>. “This universal mechanism also explains the observations of our previous study on the release of methane from plants.”



Professor Keppler and his colleagues have shown, using the bacterium&nbsp;Bacillus subtilis, that there is a close connection between metabolic activity and the extent of methane formation. Under the influence of oxygen, metabolic activity leads to the formation of reactive oxygen species in cells, including hydrogen peroxide and hydroxyl radicals. In interaction with iron, highly reactive tetravalent iron compounds and hydroxyl radicals are formed, which later on drive the cleavage of a methyl radical from methylated sulfur and nitrogen compounds. Finally, a chemical reaction between the methyl radical and a hydrogen atom leads to the formation of methane.



The scientists have verified the reactive oxygen species-driven formation of methane in over 30 model organisms, ranging from bacteria and archaea to yeasts, plant cells, and even human cell lines.&nbsp;



“Methane formation triggered by reactive oxygen species most likely occurs in all organisms,” reported study lead author Leonard Ernst, a doctoral researcher at the Max Planck Institute.



Ernst and his colleagues have also discovered that additional oxidative stress – triggered by higher ambient temperatures or the addition of reactive oxygen species-forming substances – led to an increase in methane formation in the examined organisms.&nbsp;



The findings could explain why methane production by a certain organism can significantly vary, and why stress factors deeply impact the amount of production. For instance, changes in environmental and temperature conditions caused by global warming could potentially influence the stress levels of many organisms and thus their methane emissions.&nbsp;



Further research is needed to clarify the chemical underpinnings of methane production and their intricate relationships to environmental stressors.



The study is published in the journal <a href="https://www.nature.com/articles/s41586-022-04511-9">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

Study suggests that all living organisms produce methane

Methane is a potent greenhouse gas, significantly contributing to climate...

After more than 50 years of protection, green turtles are showing signs of recovery at Aldabra Atoll in the Seychelles. A new study from the <a href="https://www.exeter.ac.uk/">University of Exeter</a> reveals that green turtle populations have been steadily growing throughout the <a href="https://www.earth.com/news/islands-are-not-evolutionary-dead-ends-for-animals/">islands</a>.&nbsp;



The Aldabra Atoll in the Seychelles is home to some one of the world's largest populations of green turtles. However, before the turtles were granted protection through a hunting ban in 1968, they were nearly wiped out.



Researchers from the Seychelles Islands Foundation have been tracking this special turtle population by estimating how many clutches of eggs are laid. According to the latest analysis of the data, this figure has increased from 2,000 or 3,000 per year in the late 1960s to more than 15,000 per year by 2019.



"Green turtles have suffered massive historical population declines due to intensive harvesting of nesting females," said study lead author Adam Pritchard.



"Aldabra Atoll was the first green turtle nesting site to be protected in the Western Indian Ocean, with a ban on turtle capture in 1968, followed by continued long-term monitoring by Seychelles Islands Foundation researchers."



Professor Brendan Godley, who helped supervise the research, said that it has been an honor to support the analysis of the decades of work by the Seychelles team.



"The ongoing population increase of Aldabra's green turtles is testament to long-term protection, and offers some clear evidence of the fact that we can be optimistic about marine conservation, well enacted," said Professor Godley.&nbsp;



Overall, the results show that green turtle clutches have increased at Aldabra by 2.6 percent each year. The greatest increase in turtles has been found at Settlement Beach on Picard, which is where the most intense harvesting once took place.&nbsp;



"This study demonstrates the importance of long-term monitoring, which is often seen as less glamorous and valuable than targeted research," noted study co-author Cheryl Sanchez, who is currently doing a PhD on Aldabra’s turtles. "It has taken decades of tireless commitment to collect the data to confirm this increase, and the foresight to protect the nesting population before it was too late.



"Aldabra's green turtles should continue to be an incredible conservation success story that we can follow for decades to come."



The study is published in the journal <a href="https://www.int-res.com/journals/esr/esr-home/">Endangered Species Research</a>.



Image Credit: Richard Baxter



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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

Green turtle populations have bounced back in the Seychelles

After more than 50 years of protection, green turtles are...

Crocodilians species such as the unique, small Chinese <a href="https://www.earth.com/news/alligators-birds-hearing-dinosaur/">alligator</a> once flourished in China. However, during the Tang Dynasty in the 9th century, people started to push out crocodilians in the Han River Delta of Guangdong province.&nbsp;&nbsp;&nbsp;



A government official named Han Yu is said to have attempted to warn the crocodilians, even offering them animal sacrifices to leave the area in peace. Unfortunately, the crocodilians did not need the warning, and new evidence suggests that they were most likely wiped out by humans.&nbsp;



Recently, a team of experts led by Professor Minoru Yoneda from the <a href="https://www.u-tokyo.ac.jp/en/">University of Tokyo</a> studied two crocodilian subfossils found in the region. The animals appear to have died in the 10th and 14th centuries B.C. Although the timing means these crocodiles weren’t connected to Han Yu, the story fits with them nicely and the researchers named the croc Hanyusuchus sinensis.



Interestingly, the H. sinensis remains appear to have been beheaded as part of a ritual. Perhaps even more interestingly, the individual shares skull features both with <a href="https://www.earth.com/news/gharials-are-vanishing-in-bardia-national-park/">gharials</a> and with other crocodilians.&nbsp;



“I have studied modern crocodilians for years, but even though it’s extinct, Hanyusuchus sinensis is by far the most astonishing creature I’ve ever seen,” said study co-author Professor Jun Liu from Hefei University of Technology in China.



"Everyone is familiar with sharp-nosed crocodiles and blunt-nosed alligators, but may be less familiar with a third kind of modern crocodilian called gharials that have much longer and thinner skulls. Hanyusuchus sinensis is a type of gharial, but what’s exciting is how it also shares some important skull features with the rest of the crocodilians."



"This is significant as it could settle a decades-long debate about how, when and in what way crocodilians evolved into the three families still roaming the Earth today.”



The marks of human violence on the two subfossils indicate that they were driven to extinction by an expanding human population. The researchers believe that the crocodilians may have also left scars on the culture of China. Stories of dragons, and other cultural elements may have been inspired by the crocodilians people feared and even wiped from the Earth.&nbsp;&nbsp;



The study is published in the journal <a href="https://royalsocietypublishing.org/journal/rspb">Proceedings of the Royal Society B Biological Sciences</a>.



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

Ancient remains shed new light on crocodilian evolution

Crocodilians species such as the unique, small Chinese alligator once...

A research team led by the <a href="https://www.upenn.edu/">University of Pennsylvania</a> has recently described a new species of softshell turtle (Hutchemys walkerorum) that lived in North Dakota at the end of the Cretaceous Period, approximately 66.5 million years ago – just before the mass extinction that wiped-out the dinosaurs. Although the fossils – consisting of a partial carapace - were discovered in 1975 by a field crew from the <a href="https://www.appstate.edu/">Appalachian State University</a>, they have only been properly analyzed and described now.



Hutchemys walkerorum roamed the Earth during the same period as large dinosaurs such as <a href="https://www.earth.com/news/were-there-three-distinct-species-of-tyrannosaurus-rex/">Tyrannosaurus Rex</a> and Triceratops did. It belonged to a particular group of softshell turtles&nbsp;in the Trionychidae family called plastomenines which lived during the Cretaceous and Paleogene periods, approximately 80 million to 50 million years ago. Members of this group first appear in the fossil record during the Late Cretaceous, and were at their peak diversity before and after the Cretaceous-Paleogene boundary.



A phylogenetic analysis has revealed that this turtle belonged to a group of early trionychids (softshell turtles) in the subfamily Kuhnemydinae, which are fossil species from Asia. These findings suggests that the family Trionychidae originated in Asia before migrating to North America sometime in the Late Cretaceous. Although these turtles are similar to the softshell turtles that exist today, the bones covering their abdominal area were larger and more strongly sutured together.



“Until recently we didn’t understand these softshell turtles very well,” said study lead author Steven Jasinski, a paleontologist at <a href="https://www.harrisburgu.edu/">Harrisburg University</a>. “However, we are starting to get more information on this extinct group of turtles and further understanding their evolution, including how they dealt with the mass extinction.”&nbsp;



“With this study we gain further insight into winners and losers during the cataclysm that ended the Age of Dinosaurs,” added study senior author Peter Dodson, a professor emeritus of Paleontology at the University of Pennsylvania. “The mighty dinosaurs fell, and the lowly turtle survived.”



A detailed description of this specimen is published in the journal <a href="http://dx.doi.org/10.1016/j.cretres.2022.105172">Cretaceous Research</a>.&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

Softshell turtles lived alongside the dinosaurs

A research team led by the University of Pennsylvania has...

A new study led by <a href="https://www.qmul.ac.uk/">Queen Mary University of London</a> has found that a “social supergene” drove the spread of a new form of society across groups of red fire <a href="https://www.earth.com/news/ants-can-detect-cancer-through-smell/">ants</a>. The supergene emerged in one fire ant species, and then carried the instruction-set for the novel social organization into other species through hybridization (breeding between ants of different species).&nbsp;



Originally, red fire ants – which are native to South America and infamous for their painful sting – had only colonies with one queen. However, about one million years ago, a new social form evolved where colonies could have dozens of queens. 



The scientists found that a particular version of a large section of chromosomes, called the “social supergene,” included the genetic information which was necessary to make workers accept more than one queen, and was transferred through hybridization to many other red fire ant species.



Although transfer of massive amounts of genetic information across species is rare due to genetic incompatibilities, in this case, the advantage of having multiple queens overrode these incompatibilities, making the supergene spread widely.



“This research reveals how evolutionary innovations can spread across species. It also shows how evolution works at the level of DNA and chromosomes,” said study senior author Dr. Yannick Wurm, a Reader in Evolutionary Genomics and Bioinformatics at Queen Mary University.



“It was incredibly surprising to discover that other species could acquire a new form of social organization through hybridization. The supergene region that creates multi-queen colonies is a large piece of chromosome that contains hundreds of genes. The many parts of a genome evolve to work together in fine-tuned manners, thus suddenly having a mix with different versions of many genes from another species is complicated and quite rare.”&nbsp;



According to Dr. Wurm, the presence of this supergene made workers accept extra queens, instead of executing them as they would in a single-queen colony. This new form of social organization had multiple advantages. For instance, it had more workers and could thus outcompete colonies with a single queen. Moreover, during floods or other natural disasters, such a colony of fire ants was less likely to become queenless.



Further research is needed to identify which genes or parts of the supergene region lead to these changes in behavior, and thus shed more light on this rare evolutionary process.



The study is published in the journal <a href="https://www.nature.com/articles/s41467-022-28806-7">Nature Communications</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

"Supergene" transformed the social hierarchy of fire ants

A new study led by Queen Mary University of London...

On Monday, March 7, 2022, the <a href="https://www.fda.gov/">Food and Drug Administration</a> (FDA) have given their approval for the sale of beef from gene-edited cattle in the United States, after concluding that these genetically modified animals “do not raise any safety concerns.” 



The cattle were designed by <a href="https://recombinetics.com/">Recombinetics</a> – a Minnesota-based bioengineering company – to have short, slick coats that would make them more resistant to <a href="https://www.earth.com/news/the-cattle-industry-could-lose-billions-due-to-heat-stress/">heat stress</a>. The beef resulting from these animals could be available for human consumption in about two years.



These cattle are the third genetically altered animals which were approved for human consumption in the U.S., after salmon and pigs. Unlike these animals though, the cattle did not have to go through an extended, years-long approval process, since their genetic makeup is similar to that of existing cattle and the trait can even be found naturally in some breeds.



According to Dr. Steven Solomon, the director of FDA’s <a href="https://www.fda.gov/about-fda/fda-organization/center-veterinary-medicine">Center for Veterinary Medicine</a>, the agency’s review of Recombinetics’ cattle took only a few months, and there is no reason that meat from these animals should be labeled differently once it will start to be commercialized. However, he made clear that genetically altered animals marketed to have certain advantages – such as a considerably higher ability to withstand heat than their “natural” counterparts – may need to pass through the full approval process.&nbsp;



The gene-edited trait in these cattle can be inherited, so semen and embryos could be used to produce offspring with the same shorter, more heat-resistant coats. Once the semen is used to create embryos, gestation would take approximately nine months and the resulting calves could be slaughtered after about 10 more months. These genetic alterations could make beef production more sustainable and improve animal welfare in warmer climates.



While the speed with which FDA moved in this case was applauded by many scientists and industry leaders, others criticized the agency for the lack of transparency in the review process. For instance, Greg Jaffe, an expert in biotechnology at the <a href="https://www.cspinet.org/">Center for Science in the Public Interest</a> argued that more transparency could lead to better public acceptance and minimization of potential economic disruptions from global trade (since other countries could consider these cattle genetically modified foods in need of labeling).&nbsp;



Moreover, Jaydee Hanson, the Policy Director of the <a href="https://www.centerforfoodsafety.org/">Center for Food Safety</a>, urged the FDA to keep track of the animals for several generations to ensure no unintended problems will arise.



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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

Genetically modified cattle have been cleared in the U.S.

On Monday, March 7, 2022, the Food and Drug Administration...

Climate change is significantly affecting a large number of wild populations, including many European <a href="https://www.earth.com/news/birds-involved-in-more-seed-dispersal-have-evolutionary-stability/">bird</a> species. However, global warming’s relative importance compared to other causes of change is still unclear. A new study led by the <a href="https://www.anu.edu.au/">Australian National University</a> (ANU) has investigated the impact of climate change on over 60 different bird species from the United Kingdom and the Netherlands.&nbsp;



The researchers found that half of all changes to major physical and behavioral bird characteristics since the 1960s can be linked to climate change. The other half is due to environmental factors that have changed at the same time as our climate, such as land use, urbanization, habitat loss, or the introduction of invasive species into ecosystems.



“We have shown that climate change is a major driver of these changes in the birds, but there is more at play here than we originally thought,” said study lead author Dr. Nina McLean, an expert in Climate Change Ecology at ANU.



“Not only were other unknown changes in the environment equally important in driving changes in the birds, surprisingly they generally did so in the same direction as climate change, such that their effects compounded.”



Dr. McLean and her colleagues analyzed three key traits: the timing of egg laying, the body condition of birds, and the number of offspring produced. While almost all the birds laid their eggs earlier due to climate change, in the case of the other two traits the scientists discovered a certain degree of variability.



“Some species are clearly increasing their body condition and offspring number, whereas others are suffering from it,” said Dr. McLean. “For example, garden warblers in the UK have experienced a 26 percent decrease in their average number of offspring over the past half century, which is really concerning for the long-term fate of this species, but only half of this reduction, 13 percent, can be attributed to climate change.&nbsp;By comparison, the redstart experienced a 27 per cent increase in offspring numbers over the past half century, but again only part of that increase is due to global warming.”&nbsp;



According to Dr. McLean, these findings clearly show that the impact of climate change does not act in isolation and that its effects occur in a world where wildlife resilience is already pushed to its limits due to other changes caused by humans. The compound effects of these factors pose significant threats to the livelihoods of various species that may already be endangered.



The study is published in the journal <a href="https://www.pnas.org/doi/full/10.1073/pnas.2105416119">Proceedings of the National Academy of Sciences</a>.&nbsp;&nbsp;&nbsp;



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

Climate is not the only thing changing the behavior of birds

Climate change is significantly affecting a large number of wild...

A new study published by Frontiers has identified a previously unrecognized impact that climate change has on endangered mountain gorillas. When <a href="https://www.earth.com/news/temperature-related-deaths-could-rise-exponentially/">temperatures</a> rise, mountain gorillas drink water much more frequently. 



Water plays a vital role in sustaining life. Understanding how various species use water is critical, especially as rising temperatures are expected to reduce water availability. This is a key concern for endangered species in small isolated populations vulnerable to drought and the risk of extinction.&nbsp;



Only two existing mountain gorilla populations exist. One population lives in the Virunga volcanic mountains that border Rwanda, Uganda, and the Democratic Republic of Congo, and the other lives in the Bwindi Impenetrable National Park in Uganda.&nbsp;



They are classified as an endangered species on the <a href="https://www.iucnredlist.org/">International Union for the Conservation of Nature (IUCN) Red List</a>. Mountain gorillas continue to face threats from habitat destruction and poaching. There are only around 1,000 individuals left.



Mountain gorillas live in rainforests and rely on plants for water. They live in high elevations, which makes them susceptible to faster rises in temperature. As the climate warms, the gorillas will become increasingly dependent on free-standing water from streams, rivers or puddles.



“Understanding how animals obtain water is increasingly important in the face of climate change, as warmer temperatures and more extreme weather conditions are predicted to influence water availability, which could have implications for how they use their limited habitat,” said Dr. Edward Wright of the Max Planck Institute for Evolutionary Anthropology.&nbsp;



“This is particularly important in endangered species which are vulnerable to extinction, such as mountain gorillas.”



Existing research has shown that 22 percent of primate species are vulnerable to drought. Primate habitats will likely experience 10 percent more warming than the global average.&nbsp;



By 2050, temperatures in the habitats of mountain gorillas are projected to increase by 1°C to 2.5°C, which could result in more frequent drought conditions.&nbsp;



To understand how drinking water habits could be impacted by climate change, the researchers observed drinking water behavior in the two existing mountain gorilla populations over 10 years. The results showed that both populations drank more water at higher average temperatures than at cooler ones.



This behavioral change is a logical one. Mountain gorillas drink more water to cool down and maintain healthy body temperature, just as humans do.&nbsp;



However, a greater reliance on free-standing water could ultimately impact the survival of the endangered species. This is because mountain gorillas could face increased exposure to parasites and human diseases found in free-standing water. Additionally, water availability is not always guaranteed, especially for the very limited habitat range available to mountain gorillas.



Despite these increasing concerns, extensive conservation efforts successfully moved mountain gorilla populations from a classification of "critically endangered" to "endangered" on the IUCN Red List.&nbsp;



Yet, just as the study points out, climate change may bring negative consequences on the conservation and overall survival of the species. “Our results suggest that mountain gorillas may have to work harder to maintain water balance in the future.”



The research is published in the journal <a href="https://conservationbytes.com/2020/09/29/new-journal-frontiers-in-conservation-science/">Frontiers in Conservation Science</a>.



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Mountain gorillas need more water in a warming climate

A new study published by Frontiers has identified a previously...

Fatu and Najin are the last two northern white rhinoceroses in the world, and they are both females. As a result, they can no longer reproduce naturally, and face an imminent threat of <a href="https://www.earth.com/news/higher-levels-of-biodiversity-reduce-extinction-risks-in-birds/">extinction</a>. In order to assure that this subspecies will not disappear forever, the international <a href="http://www.biorescue.org/en/home-0">BioRescue</a> consortium is attempting to create artificial egg cells by using skin cells of these rhinos. 



The scientists aim to first convert the skin cells into stem cells, and then into germ cells, or gametes, which could finally be matured into functional egg cells. These could be implanted in surrogate female southern white rhinos - a species closely related to the northern white rhinos.



Although this method seems highly futuristic for many scientists, there is in fact a precedent: in 2016, Professor Katsuhiko Hayashi from <a href="https://www.kyushu-u.ac.jp/en/">Kyushu University</a> in Japan managed to successfully transform skin into egg cells in mice, and to successfully fertilize several females, which ultimately gave birth to 11 healthy and fertile offspring. Even if the percentage of offspring was lower than with conventional artificial insemination, the fact that they developed normally and did not die prematurely make scientists optimistic that the same method could soon save northern white rhinos from extinction.



“Considering that Hayashi spent many years researching this method, we can be proud if, in three years’ time, we understand the process and have managed to produce mature northern white rhino progenitor germ cells,” said the head of the research team Sebastian Diecke, a professor at the <a href="https://www.mdc-berlin.de/">Max Delbrück Center for Molecular Medicine in the Helmholtz Association</a> (MDC) in Berlin. “If we are able to then mature these into functional egg cells, that would naturally be the crowning achievement of our research.”



In a new study published in the journal <a href="https://www.nature.com/articles/s41598-022-07059-w">Nature Scientific Reports</a>, Professor Diecke and his team have revealed that they managed to take an important step in this direction by creating induced pluripotent stem (iPS) cells from northern white rhino skin cells, which could eventually develop into immature eggs cells, or oocytes.&nbsp;



“Our paper sheds new light on pluripotency – the ability of stem cells to differentiate into all cells of the body,” said lead author Dr.&nbsp;Vera Zywitza, a postdoctoral researcher at MDC. “It therefore represents an important milestone on the road to artificially generated rhino oocytes.”&nbsp;



Although the iPS cells cannot yet be used to create germline cells due to the fact that they contain persistent foreign genetic material that the scientists were forced to add in order to prevent cell death, they can still shed much light on the nature of rhino stem cells and help scientists understand the molecular mechanisms that take place in such cells.&nbsp;



“For example, we can study why the gestation period of a rhinoceros is 16&nbsp;months whereas that of a mouse is only 21&nbsp;days, or how organs develop in different species. This teaches us a lot about evolution,” Dr. Zywitza said.



Further research is needed to clear the iPS cells from the foreign genetic factors that they now contain and make them grow into egg cells. Once this process is complete, the northern white rhino is sure to be saved from extinction.&nbsp; &nbsp;&nbsp;



Image Credit: Jan Zwilling, IZW



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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

Scientists are one step closer to creating artificial rhino eggs

Fatu and Najin are the last two northern white rhinoceroses...

<a href="https://www.earth.com/news/disposable-masks-are-increasingly-impacting-marine-animals/">Animals</a> form spectacular herds, flocks, schools and swarms that wheel and turn, collectively, in motion. A casual observer of these movements is forced to wonder how the individual animals know which direction to move in next, and how they don’t crash into one another on the way. A team of researchers led by the <a href="https://www.uni-konstanz.de/en/">University of Konstanz</a> has attempted to answer these questions by using programmable microrobots that act like a group of animals.



The researchers started with the premise that a group of animals faced with an imminent threat will try to move away from the threat, while at the same time trying to remain as close to the center of the group as possible. The group will then make an optimum flight response, even if some of the individual animals do not notice the threat, or react to it in the wrong way.&nbsp;



For their experiments, the researchers used a system of microrobots, consisting of programmable glass balls that move around actively and spread out thinly within a certain area. This scenario mimics a herd of antelope grazing peacefully on a savannah grassland. The unwelcome lion in this scene is represented by a laser beam that, when focused on the beads, warms them up from one side, causing them to move, like animals.&nbsp;



“We are able to target each individual bead and adjust its movement to fit that of its neighbors”, explained physicist and PhD student Chun-Jen Chen, who conducted most of the experiments. “The robots in our swarm are programmed to avoid collisions. They also received the information that they were to orient their motion based on the location of the approximate middle of the group. With the help of these rules, the robots organized themselves into a swirl."



According to Professor Clemens Bechinger, the microrobotic swarm reproduces the movements of animal swarms surprisingly well. As soon as a "predator" appears, the microrobots change their movements, said Bechinger. They begin to move differently, but the change in direction is only minimal and does not cause each member of the swarm to move directly away from the predator. It is striking that the group as a whole moves in a straight line away from the predator, even though individuals within the group do not necessarily move in such a direct manner.&nbsp;



“This feat in which individuals move in a way that is not ideal for each one of them, but where the group as a whole behaves optimally, is based on a collective decision-making process or ‘swarm intelligence’ where information is constantly being exchanged between different members of a group,” said Professor Bechinger. “One direct consequence of this behavior is that the efficiency of the flight response remains virtually unchanged, even if half of the microrobots - or animals - do not respond to the threat,” explained Chen. “This shows that missing or incomplete information from individual members of a group can be compensated for by other members.”&nbsp;



The physicists hypothesize that this may be a reason why animals organize themselves in groups, even though such groups are more obvious to predators than are individual animals.



While the study results will help scientists understand the basis for decision-making in groups of animals, they are also relevant for applications in the field of microrobotics. For future applications, in which multiple autonomous robots need to complete a useful task together but where there may be disruptions in communications, would benefit from the understanding gained in this study. With the knowledge gained here, a robotic swarm could work well even if, for example, the sensors in individual robots were to fail.&nbsp;



“The other microrobots would simply compensate for those with broken sensors, giving such systems a very high level of robustness," said Bechinger.



The study is published in the <a href="https://iopscience.iop.org/journal/1367-2630">New Journal of Physics</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

Animal swarms make decisions using collective intelligence

Animals form spectacular herds, flocks, schools and swarms that wheel...

Around 85 percent of the world's vertebrates, including birds, live in mountainous areas. The lowland habits between mountains keep the populations and <a href="https://www.earth.com/news/invasive-species-can-hitchhike-on-ocean-plastic/">species</a> isolated from each other. For centuries, scientists have wondered, how do new species form in different mountain areas?



Some hypothesize that birds simply fly to other mountains, while others say they don't often colonize other peaks. Researchers from the <a href="https://www.ku.dk/english/">University of Copenhagen</a> provide the first evidence of what happens, at least with birds living in the islands around Indonesia and Australia.



By collecting and analyzing genomes of various bird populations from the order Passeriformes in New Guinea, the scientists have learned that bird species emerge in the lowlands and then move up in elevation over time. They move higher over millions of years due to factors such as climate change and competition. Since most bird species exist for a few million years before going extinct, many species eventually die out while inhabiting mountainous areas.



"Our analyses demonstrate that the species living on mountain peaks are 5-10 million years old. So, the oldest and most specialized species live at elevations of 3-4 kilometers, and in small numbers. Climate fluctuations can accelerate the process, so that ancient species will go extinct faster. This will probably be a consequence of modern-day global warming as well," explained study lead author Knud Andreas Jønsson of the Natural History Museum of Denmark



Moreover, as bird populations move higher, they become more distinct from other populations. Jønsson further explains,



"We can see that the higher up in the mountains birds live, the greater the differences between populations of the same species," said Jønsson. "Some of the populations are so different, that one could make the case that they are distinct species. Conversely, there are greater similarities among lowland populations. This tells us that the spread of new species must have taken place from lowland habitats upwards."



This information is vital to conservationists. Currently, most conservation efforts in the region focus on lowland forests, and for a good reason. A large amount of these forests have disappeared, and with them, birds and many other animals. However, knowing that some of the longest-lived and genetically varied species live in the highlands, we should consider focusing conservation efforts there, especially since they are more vulnerable to global warming.&nbsp;



The study, "The formation of avian montane diversity across barriers and along elevational gradients," is published in <a href="https://www.nature.com/ncomms/">Nature Communications</a>.



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By <a href="mailto:nire518@gmail.com">Erin Moody </a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

How mountains Influence bird evolution

Around 85 percent of the world's vertebrates, including birds, live...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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

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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

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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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

Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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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

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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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...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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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.

Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



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.

Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes a new map of Mars that is providing insight into the planet’s watery past. The map also reveals where future missions could safely land on Mars.&nbsp;



The map has been created over the last decade using observations of water-rich rocks and mineral deposits. The images were captured by ESA’s Mars Express and NASA’s Mars Reconnaissance Orbiter.



"A big surprise is the prevalence of these minerals, with the map revealing hundreds of thousands of water-affected locations in the oldest parts of the planet," says ESA. "The new data will help answer exciting questions about Mars’ climate history, whether water was globally persistent or confined to short, intense episodes, and whether the conditions were ever suitable for life."



"Specifically, the map shows the locations and abundances of aqueous minerals. These are from rocks that have been chemically altered by the action of water in the past, and have typically been transformed into clays and salts."



According to John Carter of the Institut d’Astrophysique Spatiale (IAS), our collective understanding of Mars has been oversimplified. He explained that planetary scientists have tended to think that only a few types of clay minerals on Mars were created during its wet period, then as the water gradually dried up, salts were produced across the planet.



The new map shows that the composition of Mars is much more complicated than what we thought. For example, while many salts formed after Martian clays, there are some salts that are presumed to be older than some of the clays.&nbsp;



“The evolution from lots of water to no water is not as clear cut as we thought, the water didn’t just stop overnight. We see a huge diversity of geological contexts, so that no one process or simple timeline can explain the evolution of the mineralogy of Mars. That’s the first result of our study. The second is that if you exclude life processes on Earth, Mars exhibits a diversity of mineralogy in geological settings just as Earth does,” said Carter.



Video 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 history of Mars is much more complex than we thought

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Today's Video of the Day from the <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes how cavefish adapted to a sedentary lifestyle over tens of thousands of years. 



The experts found that the muscle metabolism of cavefish has been genetically reprogrammed over time. As a result, the animals have experienced major changes in their morphology and behavior. Despite these changes, however, the cavefish remain healthy and fit.



The research may provide new clues about the evolutionary consequences of prolonged physical inactivity in humans.&nbsp;



“It’s no surprise that people are moving less and less as technology has advanced,” said Rohner. “With cavefish, we have a unique system where we can study what might happen if people remained couch potatoes over very, very long periods of time.”



Video Credit: Stowers Institute for Medical Research



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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.

Cavefish are healthy despite their sedentary lifestyle

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> some of the most incredible waves in the world, as seen by Landsat satellites.



"With more than 370,000 miles of coastline on Earth, there are plenty of places where epic waves build up, curl over, and hurtle toward the shore.- much to the thrill of surfers," says NASA. "There are some places where these waves are so magnificent that they can be seen from space."



"With the broad perspective of satellites, we can see how these iconic waves develop into the world’s tallest, longest, fastest, and heaviest."



Video Credit: NASA Earth Observatory&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 capture the world's biggest and fastest waves

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes why satellite images and measurements of our planet have become "essential to our survival, offering a new outlook of our world."&nbsp;



Rising sea levels pose one of the biggest societal threats associated with climate change. According to ESA, satellite altimeter missions such as Copernicus Sentinel-6 are essential in monitoring global and regional changes in sea level.



"Unbeknown to many, the island of Crete, Greece, plays an important role in the Copernicus satellite altimetry constellation and on an international stage," reports ESA.



"Satellite altimetry data have to be continuously monitored at the ESA’s Permanent Facility for Altimetry Calibration where different techniques have pioneered the use of transponders to provide the best measurements to validate satellite altimeters in space soon after launch."



Dr. Craig Donlon explains that, by understanding planet Earth through satellite measurements, we are able to find evidence of change.&nbsp;



Video Credit: European Space Agency&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

Satellites have become essential to our survival

[sendtonews key="761m2QQvR1-2035772-12187" type="single"] Today’s Video of the Day from the...