Wandering salamanders, also known as "skydiving salamanders," have fascinated scientists for years with their ability to jump and glide effortlessly through the towering canopies of coastal redwood forests. 



Despite their small size, these amphibians navigate high-altitude branches with precision, sticking their landings and taking off with ease. 



Until recently, the mechanics behind their remarkable acrobatic movement remained a mystery. Now, a new study reveals a surprising answer: blood-powered toes.



<h2 class="wp-block-heading" id="h-salamanders-that-control-blood-flow">Salamanders that control blood flow</h2>



Researchers at Washington State University discovered that wandering salamanders (Aneides vagrans) can rapidly control the blood flow in their toe tips.



This ability allows them to grip, detach, and move through their arboreal environment with remarkable efficiency. 



The study not only sheds light on an unknown aspect of salamander physiology but also has potential implications for technological advances in <a href="https://www.earth.com/news/octopus-suckers-the-future-of-underwater-adhesives/" target="_blank" rel="noreferrer noopener">adhesives</a>, prosthetics, and robotic limbs.



The research team found that salamanders can fill, trap, and drain blood within their toe tips. 



This process helps them fine-tune their attachment and detachment from surfaces, providing the grip necessary for climbing and the release required for efficient movement.



The discovery challenges previous assumptions about the function of the visible red “lakes” of blood in their translucent toes. These structures were long thought to aid in oxygenation, but no scientific evidence supported that claim.



<h2 class="wp-block-heading" id="h-advantages-of-the-control">Advantages of the control</h2>



The study suggests that controlling blood flow in the toes allows <a href="https://www.earth.com/news/giant-salamander-like-beast-gaiasia-jennyae-top-predator-before-dinosaurs/" target="_blank" rel="noreferrer noopener">salamanders</a> to adjust pressure asymmetrically.



 This fine-tuned control helps them navigate the irregular surfaces of tree bark. Surprisingly, the blood influx before “toe-off” does not aid in attachment but rather helps the salamanders detach. 



By slightly inflating their toe tips, they reduce the surface area in contact with the bark, minimizing the energy required to let go. This efficiency is crucial when gliding between branches and ensuring safe landings.



“Gecko-inspired adhesives already allow surfaces to be reused without losing stickiness,” said Christian Brown, lead author of the study, and a postdoctoral researcher in integrative physiology and neuroscience at <a href="https://wsu.edu" target="_blank" rel="noreferrer noopener">Washington State University</a>.



“Understanding salamander toes could lead to similar breakthroughs in attachment technologies.” 



<h2 class="wp-block-heading" id="h-a-documentary-shoot">A documentary shoot</h2>



The origins of this study trace back to an unexpected moment during the filming of the documentary The Americas, which will air on February 23, 2025 on NBC and Peacock.



Brown was assisting on set as a salamander expert when he noticed something unusual through the production team’s high-powered camera lenses.



Just before a wandering salamander took a step, blood appeared to rush into its toe tips. Brown and camera assistant William Goldenberg observed this phenomenon multiple times. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/01/salamandar-wandering_Aneides-vagrans_hindfoot_suction_blood-flow_credit-WSU_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/01/salamandar-wandering_Aneides-vagrans_hindfoot_suction_blood-flow_credit-WSU_1s.webp" alt="The hindfoot of a live wandering salamander (Aneides vagrans). In the background, blood can be seen filling a toe tip. Photo: William P. Goldenberg/WSU" class="wp-image-1958372"/></a><figcaption class="wp-element-caption">The hindfoot of a live wandering salamander (Aneides vagrans). In the background, blood can be seen filling a toe tip. Photo: William P. Goldenberg/WSU</figcaption></figure>



The repeated occurrence caught their attention. “We looked at each other like, ‘Did you see that?’” Brown related.



Although the documentary team moved on to other subjects, Brown’s curiosity lingered. After filming wrapped, he reached out to Goldenberg and proposed an experiment. 



Using high-resolution film equipment, they would investigate whether salamanders consistently displayed this blood-powered toe mechanism under controlled conditions.



<h2 class="wp-block-heading" id="h-salamanders-regulating-their-blood-flow">Salamanders regulating their blood flow </h2>



The research team conducted detailed video trials and microscopic analysis at Washington State University’s <a href="https://fmic.wsu.edu" target="_blank" rel="noreferrer noopener">Franceschi Microscopy &amp; Imaging Center</a>. 



Their findings confirmed that wandering salamanders regulate blood flow to each individual toe tip, which allows them to modify grip strength as needed.



This discovery provides insight into how salamanders navigate the complex terrain of the redwood canopy. The ability to release their grip efficiently is particularly significant. 



“If you’re climbing a redwood and have 18 toes gripping bark, being able to detach efficiently without damaging your toe tips makes a huge difference,” Brown said. 



The research suggests that this mechanism plays a crucial role in the salamanders’ ability to thrive in the towering heights of their natural habitat.



<h2 class="wp-block-heading" id="h-implications-beyond-one-species">Implications beyond one species</h2>



While this study focused on&nbsp;Aneides vagrans, the findings could have broader implications. Other salamander species, including aquatic ones, also have vascularized toe structures. 



These structures may serve different purposes depending on the environment, from regulating grip on wet surfaces to enhancing movement across diverse landscapes.



The discovery could also inspire <a href="https://www.earth.com/news/ai-is-pushing-the-u-s-toward-an-unpredictable-transformation/" target="_blank" rel="noreferrer noopener">innovations</a> beyond biology. Scientists studying bioinspired design are particularly interested in nature’s solutions to movement and adhesion problems.



By understanding how salamanders control their grip with blood-powered toe tips, researchers may be able to develop new adhesives and prosthetics that mimic this ability.



Brown and his colleagues plan to expand their research to investigate how similar mechanisms function in other salamander species. 



“This could redefine our understanding of how salamanders move across diverse habitats,” Brown said. The findings could help explain how different species adapt to their environments and refine our knowledge of biomechanics in amphibians.



<h2 class="wp-block-heading" id="h-new-perspective-on-salamander-movement">New perspective on salamander movement</h2>



The discovery of blood-powered toes in wandering salamanders challenges previous assumptions about their movement and grip strength. 



As scientists continue to study these remarkable <a href="https://www.earth.com/news/frogs-and-toads-face-new-risks-as-their-habitats-dry-up/" target="_blank" rel="noreferrer noopener">amphibians</a>, they may uncover even more secrets hidden within their physiology. 



For now, the ability of wandering salamanders to control their grip with precision remains an intriguing discovery in animal biomechanics.



The study is published in the <a href="https://onlinelibrary.wiley.com/doi/10.1002/jmor.70026" target="_blank" rel="noreferrer noopener">Journal of Morphology</a>. 



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



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



-----

'Skydiving' salamanders can fully control blood flow in their toes

Wandering salamanders, also known as "skydiving salamanders," have fascinated scientists for years with their ability to jump and glide effortlessly through the towering canopies of coastal redwood forests. Despite their small size, these amphibians navigate high-altitude branches with precision, sticking their landings and taking off with ease. Until recently, the mechanics behind their remarkable acrobatic movement remained a mystery. Now, a new study reveals a surprising answer: blood-powered toes. Salamanders that control blood flow Researchers at Washington State University discovered that wandering salamanders (Aneides vagrans) can rapidly control...

A team of researchers from <a href="https://oregonstate.edu/">Oregon State University</a> (OSU) has developed a new satellite tag called RDW which allows scientists to better track <a href="https://www.earth.com/news/great-whales-will-drift-southward-due-to-climate-change/">whales</a>’ behavior, including previously unobserved feeding events during dives. This tag is a major advancement in researchers’ ability to observe important whale behavior events and habitats, and better understand whales’ responses to human activities, such as ship traffic or military sonar.



As shipping traffic increases, whales are more at risk of being struck by large vessels. According to the experts, the 30 meters of the water column (the vertical expanse of water which stretches from the water’s surface to the ocean floor) is considered a “danger zone” for whales swimming through shipping lanes.



“One of the benefits of these new tags is that they give us information about how much time whales are spending within the danger zone throughout their migration,” said study lead author Daniel Palacios, an associate professor of Whale Habitats at OSU. “With that information, we can identify areas of higher risk and make more informed decisions to help protect them from the threat of ship strikes.”



Moreover, the ability to monitor dive behavior and identify changes could also have important applications for assessing how whales respond to sources of loud sound, such as sonar used by the United States Navy. In addition, the new satellite tag could help shed more light on marine mammal physiology, behavior, ecology, and conservation.



“Studying anything, whether it is a plant, animal or even something like our solar system, relies on our ability to observe it,” said study co-author Ladd Irvine, an expert in the ecology of large whales at OSU.



“Whales spend the vast majority of their lives underwater, where we can’t see them. They can move more than 100 kilometers in a day, so typical methods of observation aren’t reliable for keeping track of where they are going or what they are doing. Tags allow us to ride along with the whales as they go about their lives, similar to a fitness tracker or smartphone app.”



This new system allows scientists to monitor the feeding behavior of whales over much longer periods than was previously possible. “Before the advent of tagging, we could only get glimpses into the lives of the whales when they surfaced or by following individuals for a few hours at a time. It was like trying to watch a theater production in the dark, where someone would flip the lights on for a few seconds every now and then. By tracking whales across weeks, months, and even over a year of their lives, we are now able to put together a more complete picture of the lives of whales,” Irvine concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1186/s40317-022-00297-9">Animal Biotelemetry</a>.&nbsp;



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.



---



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

Satellite tag allows long-term tracking of whale behavior

A team of researchers from Oregon State University (OSU) has...

<a href="https://www.earth.com/news/coral-reefs-can-survive-if-given-the-chance-to-evolve/">Coral reefs</a> all over the world are currently imperiled by a variety of factors, such as mass bleaching events due to climate change or ocean acidification. In order to protect the reefs, some scientists, resource managers, and conservationists have argued that restoring populations of algae-eating fish (such as the parrotfish) could promote the recovery of distressed reefs – a theory known as “fish-mediated resilience.”



However, according to a new study led by the <a href="https://umich.edu/">University of Michigan</a> (U-M) that analyzed long-term data from 57 coral reefs around the French Polynesian Island of Mo’orea, such a strategy may not be sufficient, since fish do not efficiently regulate coral reefs over time.&nbsp;



“This paper very well might radically change how we think about the conservation of coral reefs,” said study co-senior author Jacob Allgeier, an assistant professor of Ecology and Evolutionary Biology at U-M. “People have been saying for years that we can protect coral through fisheries management, and our work on Mo’orea reefs shows that this is unlikely to work - there are too many other things going on. There is functionally no measurable effect of fishes on coral cover over time.”



During the 2006-2017 data-collection period, Mo’orea coral reefs were negatively impacted by two major events: a devastating outbreak of the coral-eating crown-of-thorns starfish, and a direct hit from the Cyclone Oli in 2010. These events allowed scientists to study the degradation and subsequent recovery of the Mo’orea reefs, and examine which factors contributed to their successful recovery.&nbsp;



“We found no evidence that the substantial variation in fish community biomass and diversity had any influence on how sites recovered from disturbances,” reported study lead author Timothy Cline, a former postdoctoral fellow at U-M. “Instead, we suggest additional location-specific attributes are critical in recovery, and the fish community is just one component of a suite of variables that must be considered.”



The theory of fish-mediated coral reef resilience has led to calls on moratoriums on fishing for algae-eating fish – a well-intentioned but misguided management strategy with major implications for the millions of people who depend on coral-reef fisheries for sustenance and income. According to these new findings – which identify a multitude of threats to coral reefs, including predatory species, nutrient pollution, ocean acidification, overfishing, coral bleaching, and sedimentation – it would make more sense to support strategies which promote the conservation of diverse habitats and coral reef types at different stages of degradation.



“We do need to manage fisheries in these ecosystems, but instead of things like wholesale restrictions on parrotfish, we should consider management efforts that promote sustainable harvest throughout the food web to disperse the impacts of fishing,” Professor Allgeier concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41559-022-01882-0">Nature Ecology &amp; Evolution</a>.&nbsp;&nbsp;



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.



---



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

Restoring fish will not be enough to protect  coral reefs

Coral reefs all over the world are currently imperiled by...

A new study led by <a href="https://wsu.edu/">Washington State University</a> and Texas A&amp;M University adds to a growing collection of evidence that bears are not <a href="https://www.earth.com/news/african-carnivores-face-range-losses-in-the-future/">carnivores</a>. The research suggests that bears are omnivores like humans - even though they are fed high protein diets like carnivores while in captivity.&nbsp;



“Bears are not carnivores in the strictest sense like a cat where they consume a high-protein diet,” said study lead author Professor Charles Robbins. “In zoos forever, whether it's polar bears, brown bears or sloth bears, the recommendation has been to feed them as if they are high-protein carnivores. When you do that, you kill them slowly.”



The WSU Bear Center is the only research institution in the United States with a captive population of grizzly bears. Professor Robbins, who founded the center, has studied bear nutrition for decades. In a previous project, he and his graduate students discovered that grizzly bears gain the most weight when they are fed a combination of protein, fats and carbohydrates.



For the latest study, the researchers set out to investigate the food preferences of captive giant pandas and sloth bears by conducting feeding studies. Under human care, sloth bears are dying up to 20 years early, and there is a lack of data on their nutritional requirements. One theory is that the bears are fed too much protein, which is causing cancer and disease.



"Consumption of diets with inappropriate macronutrient profiles has been associated with increased energy expenditure, ill health, failed reproduction, and premature death. Consequently, we conducted feeding and preference trials with giant pandas and sloth bears, a termite and ant-feeding specialist," wrote the study authors.&nbsp;



"We found that giant pandas are low-protein, high-carbohydrate omnivores, whereas sloth bears are low-protein, high-fat omnivores. The preference for low protein diets apparently occurred early in the evolution of ursids and may have been critical to their world-wide spread."



When presented with unlimited avocados, baked yams, whey and apples, the sloth bears almost exclusively preferred the fat-rich avocados. The exports said that this high-fat, low-carb diet is similar to their wild diet of termites and ants as well as their eggs and larvae.



The researchers also found that giant pandas preferred the carbohydrate-rich bamboo culm found in the woody stalks over the more protein-rich leaves. The results of the study suggest that, when given the chance, bears know what to eat to maximize their health and fitness.&nbsp;



“There's certainly this long-standing idea that humans with PhDs know a lot more than a sloth bear or a brown bear,” said Robbins. “All of these bears started evolving about 50 million years ago, and in terms of this aspect of their diet, they know more about it than we do. We’re one of the first to be willing to ask the bears: What do you want to eat? What makes you feel well?”



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41598-022-19742-z">Scientific Reports</a>.



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.



---



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

Bears are not carnivores, and they crave a healthy diet

A new study led by Washington State University and Texas...

A new study conducted by <a href="https://www.earth.com/news/birdsong-frequency-is-influenced-by-sexual-selection/">birdsong</a> scientists from the <a href="https://ucsd.edu/">University of California, San Diego</a> (UCSD) in collaboration with musicians from the <a href="https://www.sydney.edu.au/music/">Sydney Conservatorium of Music</a> has found that the order of song elements – or the syntax – of Australian pied butcherbirds is strongly associated with the butcherbird’s rhythmical timing. In the human brain, grammatical syntax and musical rhythm processing have been found to share cognitive resources. The study suggests that songbirds could be processing syntactic-rhythmic relationship in a similar manner to humans.&nbsp;



The scientists and musicians involved in the research discovered that the order of song elements in Australian pied butcherbird songs share a productive relationship with how these elements are rhythmically timed. This relationship seems to be retained when the length of song elements is controlled, suggesting that how syntax and rhythm interact with each other in pied butcherbird songs is more than an artifact of simply producing song elements of different lengths in sequence.



“It is extremely exciting,”&nbsp;said study co-author Hollis Taylor, a fellow at the Sydney Conservatorium. “This collaboration adds to my previous documentation of the myriad overlaps between pied butcherbird vocalizations and human music genres. The musician in me recognizes the musician in them.”&nbsp;



According to Taylor and her collaborators, each bird sings differently, with phrases changing annually, and the songs are combinatorial. “Previously, songbird research has been dominated by studies of song syntax, or how song elements are ordered,” she explained. “Song rhythm, on the other hand, is relatively understudied. We know that if you provide a regular musical beat to children with communication disorders, their grammatical skills improve. To our knowledge, rarely anyone has thought about how syntax and rhythm might be related in birdsong.”



Until recently, birdsong researchers have mainly studied song syntax via information theory – a theory that originates in mathematics and is focused on the encoding of discrete symbols rather than on temporally-continuous bio-acoustic signals. While this has led to a rich variety of valuable studies on birdsong syntax, other aspects of songbird behavior have been largely ignored.



“Information theory tends to treat birdsong as chunkable units; our paper shows we can more directly use music theory to patch some of the inherent problems of information theory,” Taylor said.



Although further laboratory research is necessary to clarify whether songbirds truly process syntactic-rhythmic relationships in the same way as humans, these findings suggest that songbird and human cognition may have more similarities than previously thought, despite the fact that birds lack a layered cerebral neocortex, which is believed to support complex cognition in humans.



“Our paper adds to a gradually growing belief in the birdsong scientific community that we can start integrating what we know about how humans process music to understand how songbirds process their songs. In this pursuit, we can begin to understand the latent musicality of other animals, and in turn, re-examine our own musicality,” concluded lead author Jeffrey Xing, a researcher at UCSD.



The study is published in the journal <a href="http://dx.doi.org/10.1098/rsos.220704">Royal Society Open Science</a>.&nbsp;&nbsp;



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.



---



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

Songbirds have some impressive cognitive skills

A new study conducted by birdsong scientists from the University...

A new longitudinal study led by the <a href="https://wustl.edu/">Washington University in St. Louis</a> (WUSTL) has found evidence of lasting social relationships between chimpanzees and gorillas in the wild. Drawing from over two decades of observations of <a href="https://www.earth.com/news/primates-have-greater-diversity-on-indigenous-lands/">primates</a> at the Nouabalé-Ndoki National Park in the Republic of Congo, the experts have documented social ties between individual chimpanzees and gorillas that persisted over several years and across different contexts.



“There are few (if any) studies of interactions between primate species that have been able to take the identity of individuals into account,” said study lead author Crickette Sanz, a professor of Biological Anthropology at WUSTL. “It has long been known that these apes can recognize individual members of their own species and form long-term relationships, but we had not known that this extended to other species.”



“An example of what we found might be one individual traveling through a group of the other species to seek out another particular individual. We were also able to document such interactions over time and in different contexts in this study.”



Such long-lasting forms of inter-species collaboration have several possible benefits, including protection from predation, improved foraging options, and other social benefits from information sharing. “Rather than thinking about chimpanzees alone, we should be thinking about them within diverse and dynamic habitats where they are actively engaging with other species and play an integral role in the persistence of the unique ecosystems in which they exist,” explained study co-author David Morgan, a research fellow at the <a href="https://www.lpzoo.org/">Lincoln Park Zoo</a>.



While social interactions between members of different species have many benefits, they also increase the risk of transmission of various infectious diseases. For instance, the highly transmissible Ebola virus has already had a devastating impact on ape populations in Central Africa, wiping out one-third of the world’s chimpanzees and gorillas.



“No longer can we assume that an individual ape’s social landscape is entirely occupied by members of their own species,” said study co-author Jake Funkhouser, a doctoral student in Biological Anthropology at WUSTL. “The strength and persistence of social relationships that we observed between apes indicates a depth of social awareness and myriad social transmission pathways that had not previously been imagined. Such insights are critical given these interspecies social relationships have the potential to serve as transmission pathways for both beneficial socially learned cultural behaviors and harmful infectious disease.”



Studying co-existing primates may shed new light on interactions between early hominins. While scientists generally assumed that these hominins would competitively exclude each other from using the same resources, this study suggests that these interactions would have most likely occurred in more tolerant social contexts.



The study is published in the journal<a href="https://doi.org/10.1016/j.isci.2022.105059"> iScience</a>.



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.



---



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

Chimpanzees and gorillas can form lasting relationships

A new longitudinal study led by the Washington University in...

Extreme,Magnification,-,Ant,Queen,Portrait.,Ant,Super,Macro,Picture.

A new study led by the <a href="https://www.tamu.edu/">Texas A&amp;M University</a> has found that a common <a href="https://www.earth.com/news/ants-show-signs-of-cognitive-sophistication/">ant</a> species - Tapinoma sessile, a relatively small type of ant commonly known as the house ant or sugar ant – undergoes physiological and behavioral changes in unnatural settings, such as urban areas.



“Urbanization is a growing habitat around the world, and it’s becoming more important for organisms to develop ways to live when their natural settings are disturbed,” said study senior author Edward Vargo, an expert in Urban and Structural Entomology at Texas A&amp;M. “Studies like this look at important questions regarding this change, ‘Can they adapt to urban environments and how?’”



In their natural environments, house ants create small, single-queen colonies usually found under leaf litter, rocks, and logs. However, in urban and suburban areas, these ants build large, ever-expanding multi-queen colonies around human-made structures such as sidewalks, plant containers, or landscape mulching.



By analyzing the ants’ chemistry (such as levels of hydrocarbons), the genetic make-up of colonies, and ant behavior (like aggression toward familial and outsider ants), the researchers found stark differences based on the environment. Their investigations revealed that, while house ant queens in their natural habitat typically leave the colony they were born in, fly to another suitable location, and attempt to establish a new colony, queens in urban colonies stay in their nest and expand their colony rather than leaving it. As a result, urban queens were closely related and less aggressive toward ants with which they were genetically related. Moreover, behavioral analyses showed that ants in super-colonies were aggressive toward ants with outside genetics.



In addition, polydomous colonies – ant colonies that are spatially separated but socially connected – were found only in urban habitats, suggesting that house ants only create super-colonies in developed areas. Since ants from different urban areas shared some genetic similarities, it seems they are adapting to features which are common in urban environments.



In future research, the scientists aim to compare stable isotopes in the ants to investigate dietary changes and how they relate to natural versus urban environments, while taking into account factors such as temperature and the urban heat island effect.



“The study highlights urbanization’s influence on the evolutionary course for species,” concluded lead author Alexander Blumfeld, who was a doctoral student in Vargo’s lab and is now a postdoctoral fellow at <a href="https://www.yale.edu/">Yale University</a>. “It’s important for us to answer questions related to adaptive evolution, whether it is an invasive species or a forest species adapting to city environments.”



The study is published in the journal <a href="http://dx.doi.org/10.1111/mec.16188">Molecular Ecology</a>.



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.



---



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

Ants can effectively adapt to urban environments

A new study led by the Texas A&amp;M University has...

Research from <a href="https://www.lunduniversity.lu.se/">Lund University</a> shows that bird diversity in forests surrounded by urban areas is less than that in comparable rural <a href="https://www.earth.com/news/trees-are-overheating-in-warmer-rainforests/">forests</a>. To carry out the research, the scientists examined 459 naturally wooded areas near or in 32 cities in southern Sweden.&nbsp;



“Our study demonstrates that you cannot surround nature with urban development and believe that it will remain as it is, there is going to be a negative effect," said William Sidemo Holm, who worked on the study during his time as a doctoral student.



In woodlands near a city center, there were on average 25 percent less bird species compared to woodlands outside the city. Likewise, there were approximately half as many endangered species inside the urban woods.&nbsp;



The scientists emphasize they were looking at natural woodland areas inside cities, not in urban parks. In fact, this is one of the first studies to compare similar natural areas along an urban gradient.&nbsp;&nbsp;&nbsp;



“This way we know that the results are not driven by differences in the actual habitats, which in this scenario was natural forest. Instead, it was the surrounding environment that was different," said Sidemo Holm.



It was already known that urbanization has a negative impact on biodiversity, but this study is important in showing the impact of cities even on protected natural areas in their midst.&nbsp;



“Our results highlight the importance of taking surrounding nature into account in urban planning. Above all, it is important to avoid the expansion of cities adjacent to protected environmental areas where there may be endangered species - we found that these are particularly sensitive to urban surroundings," said Sidemo Holm.



“Our conclusion is that it is important to preserve natural forests both in the cities and outside them in order to maintain local diversity."



While the study may drive greater protection for urban dwelling birds and other creatures, the scientists still believe more research would be of greater benefit.&nbsp;



“In the future, it would be particularly interesting to investigate whether coherent green infrastructure in cities, or between city and countryside, can increase the opportunities for bird species in the city to find the necessary resources," said Sidemo Holm.



The research is published in the journal <a href="http://dx.doi.org/10.1111/gcb.16350">Global Change Biology</a>.



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.



---



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

Bird diversity suffers in urban environments

Research from Lund University shows that bird diversity in forests...

The fight for the survival of baby sea turtles begins long before hatching. The conditions of the beaches where eggs are laid play a critical role in <a href="https://www.earth.com/news/orangutan-mothers-are-actively-involved-in-helping-offspring-learn/">offspring</a> survival.&nbsp;



Some factors include sand moisture content, sand color, and slope angle. Human activities have been known to influence these factors and can have devastating consequences for endangered species of sea turtles.&nbsp;



Researchers with <a href="https://www.kaust.edu.sa/">King Abdullah University of Science &amp; Technology</a> (KAUST) were curious about potential sea turtle activity in a group of 1,150 islands in the Saudi Arabian Red Sea. While these islands may be potential nesting sites, very few of them have been surveyed, and those surveys were conducted decades ago. As a result, any potential damage caused by future development projects would be challenging to track.



The researchers sought to explore these islands to see if any of them provide nesting habitats for sea turtles. They visited 35 of the islands in search of tracks, nests, and eggshells, all signs of sea turtle nesting.&nbsp;



The experts found two hawksbill nests on Abu Gisha. They also found three hawksbill turtle nests and two green turtle nests on the island of Um Mesk. Rabigh, a beach on the mainland, however, contained no evidence of nests.&nbsp;



"This was expected because it is next to a foraging reef that turtles migrate away from to breed," explained Scott.



The researchers took measurements and samples from the sites to compare them to known nesting areas, including Ras Baridi, the largest nesting area in the red sea.&nbsp;



The hope is that policymakers could use this information to design management plans for future development and help us understand how climate change might affect these charismatic species.&nbsp;



"Seeing nests and tracks where they had never been recorded before confirmed our suspicion that nesting occurs along the whole Red Sea coastline," said Scott. "A wide-scale survey of all the islands off the Red Sea coast to look for nesting evidence and migration corridors will help us identify priority areas."



The study is published in the journal <a href="https://peerj.com/articles/13408/">PeerJ</a>.



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.



---



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

New turtle nesting sites discovered in the Red Sea

The fight for the survival of baby sea turtles begins...

Currently, there are thousands of <a href="https://www.earth.com/news/viruses-have-eyes-and-ears-on-their-hosts/">viruses</a> circulating among animals all over the world, most of them causing no symptoms. In recent decades, an increasing number of these viruses – such as the Severe Acute Respiratory Syndrome coronavirus (SARS-CoV) in 2003, the Middle Eastern Respiratory Syndrome virus (MERS) in 2012, and SARS-CoV-2 in 2020 - have jumped over to humans, wreaking havoc on immunologically naïve human populations.&nbsp;



Now, a research team led by the <a href="https://www.colorado.edu/">University of Colorado Boulder</a> has found that an obscure family of viruses already endemic in wild African primates and known to cause Ebola-like symptoms in some monkeys, is poised for spillover in humans too. While such arteriviruses are already considered a major threat to macaque monkeys, no human cases have been reported to date, and scientists are still uncertain what effects they would have on humans should they spill from wild animals. However, evoking parallels with HIV – a virus whose precursor also originated in African monkeys – the scientists call for vigilance from the global health community in order to avoid future pandemics.



“This animal virus has figured out how to gain access to human cells, multiply itself, and escape some of the important immune mechanisms we would expect to protect us from an animal virus. That’s pretty rare,” said study senior author Sara Sawyer, a professor of Molecular, Cellular, and Developmental Biology at CU Boulder. “We should be paying attention to it.”



Professor Sawyer and her team examined the simian hemorrhagic fever virus (SHFV), which causes a lethal disease similar to Ebola that led to deadly outbreaks in captive macaque colonies&nbsp;since the 1960s. Their investigation revealed that a receptor called CD163 plays a key role in the biology of simian arteriviruses, enabling them to invade and cause infection to target cells. To their surprise, a series of laboratory experiments revealed that SHVF was also remarkably adept at latching on to the human CD163 receptor, enabling it to get inside human cells and swiftly make copies of itself. Like HIV and its precursor simian immunodeficiency virus (SIV), simian arteriviruses also attack immune cells, disabling fundamental defense mechanisms and taking hold in the body for extended periods of time.



“The similarities are profound between this virus and the simian viruses that gave rise to the HIV pandemic,” said study lead author Cody Warren, an assistant professor of Veterinary Medicine at the <a href="https://www.osu.edu/">Ohio State University</a>.



Although another pandemic caused by this virus does not appear to be imminent, there is no guarantee that this virus will not spill over into humans, since a wide range of African monkeys already carry high viral loads of diverse arteriviruses, and some species interact frequently with humans and are known to bite and scratch people.&nbsp;



“COVID is just the latest in a long string of spillover events from animals to humans, some of which have erupted into global catastrophes. Our hope is that by raising awareness of the viruses that we should be looking out for, we can get ahead of this so that if human infections begin to occur, we’re on it quickly,” Professor Sawyer concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1016/j.cell.2022.09.022">Cell</a>.



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.



---



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

Another monkey virus could spill over to humans

Currently, there are thousands of viruses circulating among animals all...

Climate change is anticipated to affect ocean <a href="https://www.earth.com/news/plant-biodiversity-hotspots-can-be-found-on-small-scales/">biodiversity</a> and play a major role in future changes in the structure of marine communities. This is because marine species are directly impacted by changes in ocean temperature and acidity, which can alter their abundance, diversity, distribution, feeding patterns, development and breeding. Measurements of biodiversity are thus commonly used in studies that monitor and assess the effects of climate change on marine communities.&nbsp;



However, it is difficult for scientists to predict exactly how changes in ocean acidification and temperature will influence marine communities in future because of the complex nature of marine ecosystems and the inadequacy of laboratory or mesocosm (outdoor laboratory) conditions in replicating this complexity. Previous experimental research has made use of various different methods to assess the potential effects and come up with contradicting results.



In order to improve understanding of climate-driven effects on marine communities, scientists from the <a href="https://www.adelaide.edu.au/">University of Adelaide</a> have now reviewed 58 studies on community responses around volcanic CO2 vents in temperate reef, coral reef and seagrass ecosystems. The CO2 that bubbles up from below the ocean floor in these areas acidifies the seawater and this affects the surrounding biological communities. Scientists use these conditions as a proxy to provide insights into what may happen to biological communities in the face of ocean acidification.&nbsp;



The researchers also reviewed the findings of 23 studies conducted in outdoor experimental environments (mesocosms) or laboratories in order to determine whether these conditions can adequately represent the changes that occur in marine communities. Their aim was to test for the prevalence of global and generalized responses in biodiversity and community-level change to the stresses of acidification and warming in both natural and artificial locations. Their results are published in the journal <a href="http://dx.doi.org/10.1111/gcb.16410">Global Change Biology</a>.



Previous research studies have typically used measures of species diversity to track community changes. This means that they counted the number of different species present, and their abundances, in communities subject to changing environmental conditions. Overall, the University of Adelaide researchers found that this was a poor metric to use as both increases and decreases in species richness were recorded, cancelling out any global trend. Instead, there was a pattern of community replacement, meaning that although some species declined or disappeared from the community, others moved in and became established.



“The belief that climate change will alter global marine biodiversity is one of the most widely accepted,” said Professor Ivan Nagelkerken from the University of Adelaide’s Environment Institute and Southern Seas Ecology Laboratories, who was first author on the study. “Commonly used biodiversity measures don't pick up reorganization of marine communities due to ocean acidification because new species replace species that are lost. [This means that] little or no biodiversity change is detected when one community of marine species is replaced by another, even under significant habitat loss.”



Instead, the researchers detected globally repeated patterns of species replacements and community ‘reshuffling’ in the studies of CO2 vent communities. In particular, these communities showed decreases in cover by calcareous algae, crustose coralline algae, and filter feeders that have calcified shells or tubes. All these organisms contain calcium carbonate which would dissolve under acidic conditions. In contrast, there was&nbsp;increased cover by fleshy algae, turf algae and biofilm in CO2 vent communities. The authors feel that these measures of community change are more useful than simple determination of species diversity.



Furthermore, outdoor laboratory studies of marine communities were even less sensitive in detecting species replacements, community reshuffling or biodiversity change than natural systems, either to ocean acidification or warming, or to a combination of both. This lower-sensitivity is not unexpected as community structure is often influenced by ecological processes that operate over substantially larger spatial and temporal scales than those tested in outdoor laboratories.&nbsp;&nbsp;



“Experiments done in the laboratory are weak in detecting biodiversity change, so natural systems experiencing advanced ocean acidification are emerging as an innovative way of studying biodiversity responses,” said Professor Sean Connell, co-author and professor in the University of Adelaide’s Environment Institute and Southern Seas Ecology Laboratories. “No ecological study, whether in the laboratory or field, can fully replicate the complex ecological interactions that exist in nature across the time and spatial scales of relevance to climate change.”



The authors conclude that there are detectible, generalizable changes that take place in marine communities in response to environmental changes in acidity and temperature, but that these are not accurately tracked by considering changes in biodiversity alone. Instead, ecologists should monitor species replacements and community reorganization, particularly in terms of important functional groups, if they wish to detect the effects of climate change on marine communities.&nbsp;



“Future projections of ecosystem change and stability will be more meaningful if they focus on detections of species replacements and changes to the abundance of species rather than testing for signs of habitat loss or biodiversity loss&nbsp;per se,” said Professor Nagelkerken.



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.



---



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

Climate stress causes undetected changes in marine ecosystems

Climate change is anticipated to affect ocean biodiversity and play...

A,Male,Baltimore,Oriole,Is,Perched,On,A,Branch.,Tommy

According to the latest <a href="https://www.birdlife.org/news/2022/09/28/state-of-the-worlds-birds-2022-paints-most-concerning-picture-for-nature-yet/">State of the World’s Birds report</a> from BirdLife International, expansion of the agricultural industry, along with the chemicals and equipment used, have affected 73 percent of endangered bird species. Currently, nearly half of the world’s bird populations are in decline and just six percent of them are increasing in population – a bleak situation calling for increased <a href="https://www.earth.com/news/nature-conservation-must-become-more-dynamic/">conservation</a> efforts to help reverse this staggering declines.



The report – which is released every four years – has found that one in eight species (or 1,409 in total) face extinction. Since 1970, almost three billion birds have been lost in North America (a 29 percent decline), while in the European Union – a region five times smaller than North America – 600 million birds have died since 1980. Unfortunately, similar trends appear to be playing out all over the world.



“We have already lost over 160 bird species in the last 500 years, and the rate of extinction is accelerating,” said the report’s lead author Lucy Haskell, a science officer for BirdLife. “Historically, most extinctions were on islands, but worryingly there is a growing wave of continental extinctions, driven by landscape-scale habitat loss.”



This massive die-offs are mainly caused by agricultural expansion. For instance, in Europe, the agricultural sector contributed to a more than 55 percent decline in the continent’s farmland birds since 1980. Moreover, unsustainable rates of logging and deforestation also contributed to global declines in bird populations and have a significant impact on almost half of threatened bird species.



In addition, climate change and the proliferation of invasive species pose additional threats to bird populations, together with bycatch from fisheries, the expansion of residential and commercial development, the increasing frequency and intensity of wildfires, and poorly planned energy production. According to the report authors, climate change affects over 34 percent of threatened species through extreme weather events such as droughts or storms. Since natural disasters are becoming increasingly frequent and intense, bird biodiversity will likely face even more challenges.



However, despite these grim findings, the experts argue that there are solutions to solve these problems. For instance, in December 2022, the <a href="https://www.cbd.int/">Convention of Biological Diversity</a> meeting will take place, during which scientists will finalize and start implementing a ten-year plan aiming to address our planet’s declining biodiversity. Additional measures include the preservation of remaining intact habitats, the restoration of degraded ecosystems, the prevention of overexploitation and illegal bird killings, the management of invasive species, and the minimization of the negative effects of energy infrastructure such as power lines.



“There are many examples of species being saved from extinction, populations recovering, threats being effectively managed and ecosystems being restored. However, time is running out,” the authors warned.



“The next decade is critical if we are to stop unraveling the fabric of life and destroying our global safety net. Governments must adopt a Global Biodiversity Framework with ambitious commitments to ensure transformative change and urgent implementation of action. The future of the world’s birds and ultimately our own species depends upon it.”



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.



---



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

Half of the world’s bird species are now in decline

According to the latest State of the World’s Birds report...

<a href="https://www.earth.com/news/stress-has-an-odor-and-dogs-can-smell-it-on-us/">Dogs</a> and humans have a unique bond that goes back thousands of years, and humans have spent hundreds of years trying to figure out how this bond developed and why it's so strong. A study published in <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0274353#sec021">PLOS ONE</a> delved into another element of this special bond. The researchers wanted to know the specific behavioral traits dog owners found important in building a bond with their pets.&nbsp;



The experts wish to use this information in the future to program autonomous dog-like robots to mimic these desired behaviors to help cure loneliness. The researchers surveyed 153 dog owners, asking them open-ended questions about what dog behaviors they thought supported their bond with their pets.



Overall, the owners felt that attunement, communication, consistency, predictability, physical affection, positivity, enthusiasm, proximity, and shared activities were important in building and maintaining social bonds. Some dog behaviors the participants deemed meaningful were nudging and checking in on the owner during walks.&nbsp;



By including these behaviors in autonomous robot programming, the researchers believe that robots could, one day, provide the same mental health benefits that we currently get from dogs. They hope future studies will explore how people interact with dog-like robots and what kind of effect they have on human mental health.



&nbsp;Also, since our relationships with dogs are varied, they want to look at how people with different backgrounds and demographics respond to other dog-like behavior in robots.&nbsp;



"Using a qualitative approach enabled us to gain a deep and nuanced understanding of the things people find so endearing about our canine companions," wrote the study authors. "While it won't be easy to model most of these behaviors on robots, this work offers new and exciting insights for those working to develop pet-like technologies."



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.



---



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

Dog-human bond helps guide social robot programming

Dogs and humans have a unique bond that goes back...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"]</div>



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"]</div>



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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



---



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



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

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3upvlAaHgO-2256633-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"]</div>



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JRaP49ISmm-2357509-12187" type="single"]</div>



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



---



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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"]</div>



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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



---



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



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

Interactive map of the universe includes 200,000 galaxies

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"]</div>



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0879czfG3k-1785905-12187" type="single"]</div>



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"]</div>



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



---



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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"]</div>



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)



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JbW4VsY53O-1632195-12187" type="single"]</div>



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;



---



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qARzJPSabQ-2270617-12187" type="single"]</div>



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;



---



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

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"]</div>



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



---



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

[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="vpljfR2VBX-2560867-12187" type="single"]</div>



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



---



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

[sendtonews key="vpljfR2VBX-2560867-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="MHyhtebibJ-2200368-12187" type="single"]</div>



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;



---



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

[sendtonews key="MHyhtebibJ-2200368-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="761m2QQvR1-2035772-12187" type="single"]</div>



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;



---



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...