Picture a home being restored after years of neglect - that’s the transformation unfolding in the Yangtze River Basin (YRB), where bird habitats are being revitalized. 



Over the past few decades, this biodiversity hotspot - home to a rich variety of bird species - has faced severe habitat degradation driven by climate change and human activities.



Despite these challenges, the Yangtze River Basin stands as a testament to the resilience of nature and the power of rehabilitation. Today, we explore a study that offers glimmers of hope - a story that highlights the possibilities of resilience, restoration, and renewal.



The research was a collaborative effort by scientists from the <a href="https://www.nies.org/ywz/" target="_blank" rel="noreferrer noopener">Nanjing Institute of Environmental Sciences</a>, associated with China's Ministry of Ecology and Environment, and their colleagues at <a href="https://www.princeton.edu" target="_blank" rel="noreferrer noopener">Princeton University</a>.



<h2 class="wp-block-heading" id="h-biodiversity-challenges-in-the-yangtze-river">Biodiversity challenges in the Yangtze River</h2>



"The Yangtze River Basin (YRB) is an area of economic importance in China's development and is also one of the key hotspots of global biodiversity," noted the researchers.



"As the world's third largest river, the Yangtze supports a population of 900 million (or more than 60% of the country), and it harbors a large proportion of China's biodiversity, with at least 14,000 plant species and 1,731 vertebrate animal species."



The study paints a comprehensive picture of bird diversity in the Yangtze River Basin. Beyond just stating facts, the experts evaluated the effectiveness of prior conservation measures.



For the investigation, the team used the Living Planet Index (LPIO), a tool that offers a multi-faceted understanding of bird populations by taking into account species abundance, richness, and information entropy.



<h2 class="wp-block-heading" id="h-bird-s-eye-view-of-the-yangtze-river">Bird's eye view of the Yangtze River</h2>



The researchers focused on the decade between 2010 and 2020, studying 536 sites across the Yangtze River Basin. They found different trends among these regions.



The findings are mostly encouraging, revealing a 6.12% increase in bird <a href="https://www.earth.com/news/hundreds-of-bird-species-face-extinction-risks-in-the-neotropics/" target="_blank" rel="noreferrer noopener">diversity</a>. The improvement was particularly notable among terrestrial bird species and was echoed in increased functional complexity throughout the YRB.



However, challenges persist. In the downstream parts of the Yangtze River Basin, the researchers noted a 2.83% decrease in bird diversity.



This drop links back to the stark decline in wetland bird species, emphasizing the urgency of established and targeted conservation efforts in these areas.



<h2 class="wp-block-heading" id="h-wetland-restoration-is-crucial">Wetland restoration is crucial</h2>



"Our study provides compelling evidence that targeted conservation efforts can halt the <a href="https://www.earth.com/news/bird-extinctions-shatter-the-harmonious-balance-of-nature/" target="_blank" rel="noreferrer noopener">decline of biodiversity</a>," said lead researcher Wei Liu.



The message is clear: continued monitoring and wetland restoration strategies are critical for safeguarding bird biodiversity in the Yangtze River Basin.



The research presents a replicable model for other regions grappling with similar environmental dilemmas. It shows that targeted conservation work can not only enhance biodiversity but also protect vital ecosystem services that underpin human well-being and economic stability.



"The results will improve our understanding of conservation and restoration programs and their impacts on biodiversity. This in turn can provide insights relevant for conservation policies and planning," said the researchers.



<h2 class="wp-block-heading" id="h-ecological-balance-of-the-yangtze-river">Ecological balance of the Yangtze River </h2>



Spanning over 6,300 kilometers, the Yangtze River is more than just Asia's longest river; it is a lifeline for countless ecosystems. Its vast basin supports a mosaic of habitats, from wetlands and forests to grasslands, creating ideal <a href="https://www.earth.com/news/bird-wings-have-a-surprising-effect-on-island-biodiversity/" target="_blank" rel="noreferrer noopener">conditions for avian species</a> to thrive.



These habitats play a crucial role in global biodiversity, acting as a sanctuary for migratory birds and endemic species.



The Yangtze’s ecological balance has been disrupted over the decades by habitat fragmentation, urbanization, and <a href="https://www.earth.com/news/bird-behavior-productivity-being-directly-impacted-by-climate-change/" target="_blank" rel="noreferrer noopener">climate change</a>. Moreover, wetlands, which serve as vital breeding and feeding grounds for birds, have borne the brunt of human activity.



Despite these challenges, the river's resilience, coupled with targeted conservation measures, offers a glimmer of hope for its future.



"In light of the extant legislation and regulations concerning the protection of the Yangtze River, it is incumbent upon the relevant authorities to devise a comprehensive, large-scale wetland ecological restoration program for the downstream area," concluded the researchers.



"Moreover, additional monitoring sites should be established in the upstream area, with an even distribution across farmland, wetland, forest, and other habitat types."



The full study was published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S2772985024000620?via%3Dihub" target="_blank" rel="noreferrer noopener">Eco-Environment &amp; Health</a>.



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Bird diversity is rebounding in the Yangtze River Basin

Picture a home being restored after years of neglect - that’s the transformation unfolding in the Yangtze River Basin (YRB), where bird habitats are being revitalized. Over the past few decades, this biodiversity hotspot - home to a rich variety of bird species - has faced severe habitat degradation driven by climate change and human activities. Despite these challenges, the Yangtze River Basin stands as a testament to the resilience of nature and the power of rehabilitation. Today, we explore a study that offers glimmers of hope...

Bamboo sharks use their shoulders to serve as tongues to help them eat, according to a new <a href="http://www.brown.edu/">Brown University</a> study.

The sharks pull their "shoulder girdles" back, creating the suction required to push food through the back of the mouth and into the digestive tract, said Ariel Camp, a postdoctoral researcher at Brown University and lead author of the study.

"They have this long pharynx, and they have to keep food moving down it," Camp said. "We think this is part of a 'hydrodynamic tongue.' Sharks and fishes that don't have a tongue control the motion of fluid within their mouths to manipulate food."

Researchers used a technology developed at Brown called X-ray Reconstruction of Moving Morphology (XROMM). It combines CT scans of the skeleton with high-speed, high-resolution X-ray movies. Tiny implanted metal markers create precise images of how bones and muscles move within animals and people.

The team used XROMM to watch three bamboo sharks eat pieces of squid and herring.

Bamboo sharks are among several species that use suction to slurp up prey out of rocky crevices or silt, Camp said. Opening their mouths widely and quickly, sometimes using muscles deep in their bodies, can create the suction they need.

The shoulder girdle is not connected directly to the jaws or head, so many scientists suspected it wasn’t involved in suction feeding.

However, the XROMM measured a swing in the shoulder girdle of all three sharks tested while they were eating. Just a fraction of a second after the sharks closed their mouths, the cartilage quickly rotated from head to tail by about 11 degrees.

Camp suspects other suction-feeding sharks move their shoulders the same way. The research may help scientists better understand how the shoulder girdle evolved in <a href="https://www.earth.com/news/sharks-secret-longer-life-humans/">sharks</a> and other fish, and could help explain how some creatures eventually made it into land, she added.

"The girdle shows up [in the fossil record], around the time that jaws evolved," Camp said. "We aren't sure exactly what structures it evolved from or how that happened. Part of understanding that history is understanding what were the functions this structure had to carry out."

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.brown.edu/">Brown University</a>

How sharks use their shoulders to eat

Bamboo sharks use their shoulders to serve as tongues to...

In an effort to meet the worldwide demand for chicken, scientists have examined how best to maximize size and weight in chickens. Swedish researchers have now identified genetic “hotspots” that influence weight in chickens.

The <a href="https://www.uu.se/en/">Uppsula University</a> scientists used two lines of White Plymouth Rock chickens, which have been bred since 1957 for their high and low weights, to gain a better understanding of the genetic architecture behind chicken weight.

The scientists identified 20 different genetic points that explained more than 60 percent of the genetic variance for the selected trait of either high or low weight.

"Our work with this long-term selection experiment has revealed that different variants at many genetic loci (points) contribute to the large divergence between the lines selected for high and low weight," said corresponding author Orjan Carlborg. "This is an interesting experimental illustration of how even small and phenotypically homogenous populations, such as the founders of our divergent lines, can harbor many genetic variants that do not diversify the population normally.”

The researchers further focused on seven of the genetic hotspots, known as quantitative trait loci. Only two could be more mapped to a single, well-defined loci; the other five contained linked loci with multiple gene variants.

The detailed dissection of the loci provides “a deeper understanding of the genome-wide mechanisms involved in the long-term selection responses,” the scientists said.

They hope to further explore their findings to increase understanding of the genetic mechanisms of chicken body-weight <a href="https://www.earth.com/news/study-high-income-countries-making-progress-with-climate-adaptation/">adaptation</a>.

The study is published in the journal <a href="https://academic.oup.com/mbe">Molecular Biology and Evolution</a>.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://academic.oup.com/mbe">Molecular Biology and Evolution</a>

Image: Paul B. Siegel

Study examines chicken weight to keep up with demand

In an effort to meet the worldwide demand for chicken,...

The sheer size and weight of the Tyrannosaurus rex would have made it impossible for the giant dinosaur to run, according to a new study.

The creature’s leg bones would have buckled under its own weight, the <a href="http://www.manchester.ac.uk/">University of Manchester</a> study said, contradicting previous estimates that the T-rex could run at speeds up to 45mph.

The <a href="https://www.earth.com/news/new-species-dinosaur-canadian/">dinosaur</a> was limited to walking speeds of about 12 mph. This is less than half the speed of the fastest man on Earth, Usain Bolt, whose personal record hit 27.8 mph.

“The running ability of T. rex and other similarly giant dinosaurs has been intensely debated amongst paleontologist for decades,” said William Sellers, lead author of the study. “However, different studies using differing methodologies have produced a very wide range of top speed estimates and we say there is a need to develop techniques that can improve these predictions.”

The new study extensively examined the gait and biomechanics of the world’s most famous dinosaur. It used high performance computing technology to create a new simulation model to test the findings.

The results demonstrate any running gaits for Tyrannosaurus rex would probably lead to “unacceptably high skeletal loads,” and would simply break the dinosaur’s legs.

“Here we present a new approach that combines two separate biomechanical techniques to demonstrate that true running gaits would probably lead to unacceptably high skeletal loads in T. rex,” Sellers said.

The findings have forced scientists to re-examine how T-rex caught its prey, Sellers told <a href="http://www.reuters.com/article/us-science-trex-running-idUSKBN1A3182">Reuters</a>.

"It certainly would not have been able to chase down faster-moving prey animals," said Sellers. "That leaves other hunting options such as ambush, and of course it means that (discredited) ideas such as 'T-rex the scavenger' have to be reconsidered."

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.manchester.ac.uk/">University of Manchester</a>, <a href="http://www.reuters.com/article/us-science-trex-running-idUSKBN1A3182">Reuters </a>

Why the Tyrannosaurus rex was too big to run

The sheer size and weight of the Tyrannosaurus rex would...

A new species of dinosaur has been identified by Canadian scientists and named after esteemed paleontologist Philip J. Currie. The name Albertavenator curriei, which means “Currie’s Alberta hunter,” honors Currie for decades of work focused on predatory dinosaurs of Alberta.

The bones of Albertavenator were initially thought to belong to Troodon, which lived 5 million years before Albertavenator. Both of the closely-related dinosaurs were around the same size as humans, walked on two legs, and were covered in feathers. 

Scientists from the <a href="https://dinomuseum.ca/">Philip J. Currie Dinosaur Museum</a> and the <a href="http://www.rom.on.ca/en">Royal Ontario Museum</a> distinguished Albertavenator from its predecessor Troodon through a meticulous comparison of bones found in the dinosaurs’ heads. They discovered the skull of Albertavenator was noticeably shorter and more robust than that of Troodon. 

Dr. David Evans, Senior Curator of Vertebrate Palaeontology at the Royal Ontario Museum, led the study.

"The delicate bones of these small feathered dinosaurs are very rare. We were lucky to have a critical piece of the skull that allowed us to distinguish Albertaventaor as a new species." said Dr. Evans. "We hope to find a more complete skeleton of Albertavenator in the future, as this would tell us so much more about this fascinating animal."

It is challenging for scientists to identify new species from fragmentary fossils. Also, hundreds of teeth found in Alberta will not be helpful in this study considering that teeth of Albertavenator would closely resemble teeth of Troodon.

"It was only through our detailed anatomical and statistical comparisons of the skull bones that we were able to distinguish between Albertavenator and Troodon," said Thomas Cullen, a Ph.D. student of Evans at the University of Toronto and co-author of the study.

The identification of this new species indicates that small dinosaurs in the Late Cretaceous of North America were more diverse than research has shown. Derek Larson is the co-author on the study and Assistant Curator of the Philip J. Currie Dinosaur Museum.

"This discovery really highlights the importance of finding and examining skeletal material from these rare dinosaurs," said Larson.

This is not the first time a new species of dinosaur has been identified by re-examining museum research collections. The study, published today in the Canadian Journal of Earth Sciences, suggests that revisiting fossil collections could uncover more dinosaur species.

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.rom.on.ca/en">Royal Ontario Museum</a>

Image: © Oliver Demuth

New species of dinosaur named after Canadian science star

A new species of dinosaur has been identified by Canadian...

The Tardigrade, an eight-legged micro-animal, may be the world’s most indestructible species and will exist for at least 10 billion years - far longer than the human race, according to a new study.

The water-dwelling micro animal, also known as the water bear, is toughest, most resilient form of life on earth, the study by <a href="http://www.ox.ac.uk/">University of Oxford</a> and <a href="http://www.harvard.edu/">Harvard University</a> researchers said. It is able to survive for up to 30 years without food or water, and endure temperature extremes of up to 150 degrees Celsius, the deep sea, and even the frozen vacuum of space. 

The study implies that that life on Earth in general, will extend as long as the sun keeps shining. In their study, researchers considered three potential events that would destroy the Tardigrade while there is still sunshine: large asteroid impact, exploding stars in the form of supernovae, or gamma ray bursts.

There are only a dozen known <a href="https://www.earth.com/news/happens-asteroid-earth/">asteroids</a> and dwarf planets with enough mass to boil the oceans but none will intersect the Earth's orbit and pose a threat to tardigrades, the study concluded.

Gamma-ray bursts are too far away from earth to be considered a viable threat, the researchers said.  The probability of a massive star exploding close enough to Earth to kill all forms of life on it, within the Sun's lifetime, is negligible, according to the researchers.

“Tardigrades are as close to indestructible as it gets on Earth, but it is possible that there are other resilient species examples elsewhere in the universe,” said Rafael Alves Batista of Oxford, co-author of the study. The findings bolster the importance of exploring Mars and other areas of the solar system, he added.

“If Tardigrades are earth's most resilient species, who knows what else is out there?” he said.

The study is published in <a href="http://www.nature.com/srep/">Scientific Reports</a>.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.ox.ac.uk/">University of Oxford</a>

The world’s most indestructible species will outlast humans

The Tardigrade, an eight-legged micro-animal, may be the world’s most...

Being able to plan ahead for certain anticipated events is a skill that has only been seen in humans and great apes… until now. Research Can Kabadayi and his team studied the behavior of ravens when they are given the opportunity to plan ahead for a greater reward versus an immediate, lesser reward. 

This type of complex, cognitive behavior had never before been observed in <a href="https://www.earth.com/news/coastal-nesting-birds-face-extinction/">birds</a>. Some corvids – a family of birds that includes ravens – have shown the ability to plan beyond the immediate present, but these behaviors have been mainly based around catching food.

In the first set of experiments, ravens were trained to use a tool in order to open a puzzle box that contained a reward. The ravens were then given the box, but no tool. The box was then removed and an hour later the ravens were given the original opening tool along with several “distractors.”

The researchers observed that almost every raven studied was able to chose the correct box-opening tool, exhibiting a success rate of 86%. A similarly high success rate of 78% was found when ravens were given the opportunity to use  a token to later barter for a reward.

Not only did the ravens show similar planning behavior to great apes, they actually planned for bartering more effectively than apes. For the tool-using experiments, the ravens were very similar to apes in their success rate as well, despite not having opposable thumbs.

In the last set of experiments, the ravens were given the box-opening tool along with distractor tools and an immediate reward, but they were only allowed to take one item. The immediate reward was less appealing than the reward in the box, and the ravens ended up exhibiting a level of self-control similar to what has been observed in apes.

Ravens have been studied rather extensively in the past, given their relative advanced intelligence compared to almost all other bird species. This study further enhances our understanding of their cognitive abilities, and brings us closer to understanding how these animals thrive in the wild.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: American Association for the Advancement of Science

Ravens may be even more intelligent than previously thought

Being able to plan ahead for certain anticipated events is...

Social hierarchy within many species of the animal kingdom is an important part of their community structure. How this hierarchy gets determined is reliant on a number of physiological and biological factors. In a new study, researchers have discovered a neural circuit in the brains of mice that could play a significant role in social dominance. 

The region of the <a href="https://www.earth.com/news/brain-overcomes-fear-picks-course-action/">brain</a> this was found in is the dorsomedial prefrontal cortex (dmPFC), which has previously been implicated in the long-term regulation of social dominance.

Researcher Tingting Zhou and colleagues placed mice test subjects in a standard social dominance test in which male mice were put into a tube facing each other. The scientists then observed how the mice engaged in certain behaviors such as push initiation, push-back, resistance, retreat, and stillness.

They monitored individual neurons in the dmPFC during this test, which revealed that there was a particular region that became more active during dominance behaviors like push and resistance. Researchers then inhibited these dominance neurons and ran the same tests. Under the influence of this drug inhibition, mice with established social rank exhibited significantly less dominant behavior and more retreating behavior.

For the next step, researchers used optogenetics to stimulate the dmPFC during the test. Under these conditions, mice ended up winning dominance battles against previously dominant opponents with a 90% success rate. The motor performance and anxiety level of the mice remained unaffected.

These effects had long-lasting consequences, as mice that had more than six “photostimulated wins” actually maintained their new rank the next day. Mice with less than five photosimulated wins ended up falling back to their original rank.

This study helps shed light on dominance and social behaviors that – while only seen in mice so far – may have parallels to human behavior as well.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.aaas.org/">American Association for the Advancement of Science</a>

This part of the brain determines social dominance, alpha males

Social hierarchy within many species of the animal kingdom is...

Seaside sparrows usually live in tidal marshes and build their nests just above normal high tide where they can stay hidden from predators in the vegetation. Rising sea levels may put these birds in a predicament, as unusually high tides will destroy their nests. However, moving their nests up makes them more vulnerable to predators. A new study  from <a href="http://www.americanornithologypubs.org/loi/cond">The Condor: Ornithological Applications</a> reveals that despite the increasing risk of flooding, the nests of these saltmarsh birds face much more of a threat from predation.

Elizabeth Hunter of the <a href="http://www.uga.edu">University of Georgia</a> developed a model to simulate the nesting behavior and success rates of seaside sparrows on the coast of Georgia. Her model revealed that predation poses a much greater threat to the survival of seaside sparrows.  

The study established that flooding risk did not influence predation rates, but predation risk did impact flooding risk - due to the fact the sparrows move their nests lower for safety. Despite this increased risk of flooding paired with a projected spike in sea levels, predation risk remains almost seven times more menacing to seaside sparrows than flooding.

"Nest predation rates are so high right now that even under extreme sea level rise conditions, more nests are likely to be eaten than flooded," explained Hunter. "However, predation and flooding threats act synergistically, meaning that any estimates of the negative effects of sea level rise on the nesting success of Seaside Sparrow or other species are likely underestimates if they do not also consider the negative effects of predation on flooding risk. The flip side of this is that management actions to reduce nest predation could also reduce the risk of nest failures from flooding." 

If conservation strategies are used to protect seaside sparrows from predators, they can overcome the threats of both flooding and predation. The birds could place their nests higher up to stay clear of extreme high tides if their nesting sites were fenced in, for example.

Chris Elphick of the <a href="http://uconn.edu">University of Connecticut</a> is an expert on tidal <a href="https://www.earth.com/news/saltmarsh-sparrow-may-go-exctinct/">marsh birds</a> who commented on Hunter’s study. 

"The study nicely illustrates the importance of understanding the behavior of individual birds when trying to devise strategies to mitigate threats such as predation and tidal flooding,” said Elphick. “Regardless of the threat, it is increasingly clear that tidal marsh birds and their habitats are in trouble, and that we need to explore a range of potential solutions to find ways to help them persist in light of the many ways that humans are changing coastal habitats."

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.americanornithologypubs.org/loi/cond">The Condor: Ornithological Applications</a>

Image Credit: E. Hunter

Rising sea levels push Seaside Sparrows closer to predators

Seaside sparrows usually live in tidal marshes and build their...

When fire ants run into a tall obstruction while looking for food or escaping to new areas, they use their bodies to create structures that look like the Eiffel Tower, a new study found.

It only takes about 20 minutes to build the towers, which are several inches tall, the <a href="http://www.gatech.edu/">Georgia Institute of Technology</a> study said. There is no leader or coordinated effort by the ants, who wander around aimlessly following a certain set of rules, the study found.

"If you watched ants for 30 seconds, you could have no idea that something miraculous would be created in 20 minutes," said David Hu, a Georgia Tech mechanical engineering professor and co-leader of the study. "With no planning, and using trial-and-error, they create a bell-shaped structure that helps them survive."

The research is a follow-up to the group's 2014 “ant raft” research, which examined how ants link their bodies to build waterproof structures that stay afloat for months. The ants become building blocks of the raft.

They do the same thing for the towers, first searching for an empty spot. When they find one, one ant stops, and others climb on top to make the tower.

The tower gets wider as it grows taller, gradually becoming the same shape as the Eiffel Tower in Paris, researchers said.

"We found that ants can withstand 750 times their body weight without injury, but they seem to be most comfortable supporting three ants on their backs," said Craig Tovey, a co-author of the study and professor in Georgia Tech's Stewart School of Industrial &amp; Systems Engineering. "Any more than three and they'll simply give up, break their holds and walk away."

Ants keep the tower is in constant motion, sinking as the <a href="https://www.earth.com/news/fragile-insects-heat-reproduction/">insects</a> work. Ants slide down, then exit out of tunnels buried in the base. 

"Ant towers are like human skin," said Hu. "The tower is constantly rebuilding and replacing its surface."

The findings, published in the journal <a href="http://rsos.royalsocietypublishing.org/">Royal Society Open Science</a>, could help with development of modular robots, which aren’t currently effective at building tall towers, the authors said.

They could also help scientists better understand insect survival, said Tovey.

"Ninety-nine percent of all the species that have ever lived on Earth are extinct," Tovey said. "The rest of us have developed very effective techniques to survive. Why wouldn't we study these processes?”

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.gatech.edu/">Georgia Institute of Technology</a>

Credit: Georgia Tech

How ants build a mini Eiffel Tower to escape danger

When fire ants run into a tall obstruction while looking...

An average of two vertebrate species go extinct every year but few people notice, according to a new study.

Extinctions often attract little attention because the rate seems relatively low and doesn’t pose an immediate threat to natural systems, according to the <a href="https://www.stanford.edu/">Stanford University</a> study. 

"This is the case of a biological annihilation occurring globally, even if the species these populations belong to are still present somewhere on Earth," said co-author Rodolfo Dirzo. 

A 2015 study co-authored by Paul Ehrlich, Stanford Professor Emeritus of Biology, showed that Earth has entered an era of <a href="https://www.earth.com/news/fossil-footprints-recovery-extinction/">mass extinction</a> unparalleled since the dinosaurs died out 66 million years ago. 

In the new study, researchers mapped the ranges of 27,600 species of birds, amphibians, mammals and reptiles - representing nearly half of known terrestrial vertebrate species - and analyzed losses in 177 well-studied mammal species between 1990 and 2015.

More than 30 percent of vertebrate species are declining in population size and range, the study found. All of the 177 mammals for which the researchers had detailed data have lost 30 percent or more of their geographic ranges, and more than 40 percent have lost more than 80 percent, the study said.

Tropical regions have been the hardest hit, particularly the mammals of south and southeast Asia, where all the large-bodied species of mammals analyzed have lost more than 80 percent of their geographic ranges.

As many as 50 percent of the number of animals on Earth have disappeared, as have billions of animal populations. This amounts to "a massive erosion of the greatest biological diversity in the history of Earth," the authors write.

"The massive loss of populations and species reflects our lack of empathy to all the wild species that have been our companions since our origins," said the new study's lead author, Gerardo Ceballos of the<a href="https://en.wikipedia.org/wiki/National_Autonomous_University_of_Mexico"> National Autonomous University of Mexico</a>. "It is a prelude to the disappearance of many more species and the decline of natural systems that make civilization possible."

The researchers call for curbs on human overpopulation and overconsumption - and challenge society to move away from "the fiction that perpetual growth can occur on a finite planet."

The study was published in the journal <a href="http://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source:<a href="https://www.stanford.edu/">Stanford University</a>

Image: Gerardo Ceballos

Population declines underway, two species go extinct each year

An average of two vertebrate species go extinct every year...

One of the friendliest and least aggressive members of the primate family is the bonobo. The species is known for their peaceful demeanor and docile nature, as well as their friendly relationships between sexes within their groups. However, researchers have recently found that these friendly social settings still don’t allow for equal opportunity when it comes to mating. 

Certain males within the group may have a significant advantage over others in siring offspring. In fact, in one group that was studied, researchers found that a single male was responsible for over 60 percent of an entire generation of bonobos.

Even though primate communities such as <a href="https://www.earth.com/news/chimpanzees-patrol-territory/">chimpanzees</a> are known to be more aggressive and male-dominated, the study found that the reproductive imbalance for bonobos was significantly higher. The researchers aren’t yet sure why this is the case, but they believe that it may be due to the tendency for the majority of females to choose to mate with the single, most attractive male – not unlike a bonobo version of The Bachelor.

Martin Surbeck of the <a href="http://www.eva.mpg.de/index.html">Max Planck Institute for Evolutionary Anthropology</a> in Germany and his colleagues have been studying bonobo societies for years, focusing specifically on the relationships between males and females. They noticed that within the bonobo groups, males would invest time in friendly relationships with certain females. Surbeck and his team believe this behavior may increase paternity success for those males.

In their study, the researchers tested the paternity of 24 bonobo offspring over a 12-year period in one bonobo community in the Democratic Republic of Congo, and compared the paternity data to published data in chimpanzee communities.

They originally thought that the freedom bonobo females have to choose their mates would create a greater distribution of paternity across the males of the community, but it turned out to be the opposite. In their paper, they state, “if female choice is the mechanisms behind our observation, all females seem to prefer more or less the same male.”

The researchers think one of the factors for this difference between bonobos and chimpanzees is that bonobos spend more time as a larger group. This means that low-ranking males may have fewer chances to sneak away and copulate with certain females. However, female choice is likely be playing a major role as well.

“Unlike chimpanzees, where all adult males outrank all adult females, and even the lowest-ranking males can coerce females into mating, there appears to be a greater role for female choice in bonobos,” explains Kevin Langergraber of <a href="https://www.asu.edu/">Arizona State University</a>. “Perhaps they choose high-ranking males.”

Moving forward, the researchers will attempt to observe more bonobo groups in order to ensure that this behavior isn’t unique to a single community. More information on this study can be found in the journal Current Biology.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.cell.com/">Cell Press</a>

Image Credit: Zanna Clay / LuiKotale Bonobo Research Project

Friendly bonobos display aggressive mating tendencies

One of the friendliest and least aggressive members of the...

Researcher H. Arthur Woods of the <a href="http://www.umt.edu/">University of Montana, Missoula</a>, and his team went on a mission to Antarctica in order to explore the phenomenon of “polar gigantism.” For years, scientists have observed that polar species tend to have larger bodies than their temperate and tropical relatives. This has led to researchers wondering how these larger species function physiologically – including how they get enough oxygen to all parts of their body. Woods and colleagues were studying this phenomenon in sea spiders – looking at their beating hearts under microscopes – when he realized that the spiders’ hearts were beating very weakly. 

In fact, their hearts weren’t pushing any blood past the spiders’ central area. What Woods then noticed was that the spiders’ guts were exhibiting strong and organized contractions.

“My 'aha!' moment was to consider that maybe all that sloshing of blood and guts was not about digestion but instead about moving respiratory gases around,” says Woods.

The researchers point out that sea spiders have a unique gut to begin with, as their guts branch our from their center and sections of gut tube extend to the end of every leg. 

Woods explains, “In effect, sea spiders guts are ‘space-filling’ and ubiquitous in their bodies in the same way that our circulatory systems are space-filling and ubiquitous.”

The <a href="https://www.earth.com/news/ground-spiders-ambush-prey/">spiders</a> are able to use this system to move fluids through gut peristalsis, which is the movement of waves of involuntary constriction and relaxation of muscles. Humans use gut peristalsis as well in order to mix our gut contents and move them through our digestive system.

Woods and his team performed a series of experiments and observations in 12 sea spider species. They used video microscopy of tracers in the spiders’ hemolymph and guts while manipulating the guts’ ability to contract – effectively allowing them to test and confirm their hypothesis.

Researchers say they are not sure if this physiological function first arose for purely digestive functions and the respiratory benefits came later or vice versa. But they do know that this discovery is a prime example of the diversity of evolutionary solutions that Earth’s organisms find. 

More information on this study can be found in the journal <a href="http://www.cell.com/current-biology/home">Current Biology</a>.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.cell.com/">Cell Press</a>

Image: Timothy R. Dwyer (PolarTREC 2016), Courtesy of ARCUS

Sea spiders use their guts, not their hearts, to pump oxygen

Researcher H. Arthur Woods of the University of Montana, Missoula,...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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Flu viruses are more flexible than expected

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

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



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



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



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

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

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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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

Lesotho: Africa's "Kingdom in the Sky"

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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



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The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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

Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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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

[sendtonews key="qARzJPSabQ-2270617-12187" 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> 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

[sendtonews key="qas3EhyI0Y-2220951-12187" 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.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

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

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> 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

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

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> 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...