The development of a big brain in humans and its connection to social bonding has been a hot topic of debate, and secrets found in fossil teeth may hold the answers.



Researchers have been studying the fossilized teeth of an early Homo from Georgia, dating back approximately 1.77 million years. The research was made possible by the European Synchrotron in Grenoble, France.



The findings suggest that despite having a small brain and reaching adulthood at a similar pace to great apes, these early humans had a prolonged childhood. 



This could mean that the large brain of modern humans resulted from an extended childhood along with cultural transmission across generations instead of vice versa.



<h2 class="wp-block-heading" id="h-long-childhood-big-brains">Long childhood, big brains</h2>



A team of researchers - including specialists from Switzerland's <a href="https://www.uzh.ch/en.html" target="_blank" rel="noreferrer noopener">University of Zurich</a>, the European Synchrotron Radiation Facility and Georgia's National Museum - have challenged the theory that modern humans' extended childhood is directly linked to their large brains.



The team analyzed dental development in an early Homo that was almost an adult. The results suggest that though these early humans reached adulthood at a similar age as <a href="https://www.earth.com/news/buronius-manfredschmidi-tiny-great-ape-species-lived-11-million-years-ago/" target="_blank" rel="noreferrer noopener">great apes</a>, their tooth development followed a longer timeline similar to modern humans.



This proposes the distinct possibility of a longer dependency on adults and an elongated childhood for these early humans.



Remarkably, the brain size of these early Homo specimens was only marginally larger than that of a chimpanzee. This made the researchers question the link between the prolonged development and cultural transmission across generations.



An extended childhood within a three-generation context might have allowed the immature members of the group to effectively assimilate growing amounts of knowledge. 



Eventually, this led to the development of larger brains and longer life spans, traits characteristic of modern humans.



<h2 class="wp-block-heading" id="h-dental-development-in-early-homo">Dental development in early Homo</h2>



An enduring assumption has been that humans' extended growth period is a consequence of <a href="https://www.earth.com/news/our-brain-sizes-are-growing-possibly-lowering-dementia-risk/" target="_blank" rel="noreferrer noopener">increased brain volume</a> since a larger organ requires more energy resources to grow. But analysis of the fossil's dental growth has caused researchers to question this hypothesis.



The research team used synchrotron imaging to study the dental development of a near-adult fossil of early Homo from the Dmanisi site in Georgia, dated to around 1.77 million years ago. 



<div class="wp-block-sendtonews-playerselector">[sendtonews key="CWxiqQg039-4024544-12187" type="single"]</div>



“Childhood and cognition do not fossilize, so we have to rely on indirect information. Teeth are ideal because they fossilize well and produce daily rings, in the same way that trees produce annual rings, which record their development,” noted study first author Christoph Zollikofer from the University of Zurich.



<h2 class="wp-block-heading" id="h-unexpected-findings-and-a-new-perspective">Unexpected findings and a new perspective</h2>



“Dental development is strongly correlated with the development of the rest of the body, including brain development," explained study co-author Paul Tafforeau, scientist at the ESRF.



"Access to the details of a <a href="https://www.earth.com/search-results/?search=fossil%20hominid&amp;start=0" target="_blank" rel="noreferrer noopener">fossil</a> hominid's dental growth therefore provides a great deal of information about its general growth."



After almost two decades of research beginning in 2005, the initial results startled researchers. 



“We expected to find either dental development typical of early hominids, close to that of the great apes, or dental development close to that of <a href="https://www.earth.com/news/neanderthal-genes-still-influence-modern-humans/" target="_blank" rel="noreferrer noopener">modern humans</a>," said Tafforeau.



"When we obtained the first results, we couldn’t believe what we saw, because it was something different that implied faster molar crown growth than in any other fossil hominin or living great ape."



In the following years, the team conducted five series of experiments and completed four full analyses, employing various methods as dental synchrotron imaging technology advanced.



As the consistent results suggested significant implications for the "big brain - long childhood" hypothesis, the scientists needed to think creatively to interpret this fossil's findings.



“It's been a slow maturation, both technically and intellectually, to finally arrive at the hypothesis we are publishing today,” said Tafforeau.



<h2 class="wp-block-heading" id="h-longer-childhood-evolution-s-early-experiment">Longer childhood: Evolution's early experiment?</h2>



The dental development of the studied fossil suggested that milk teeth were used longer than in great apes, implying that early Homo children were dependent on adult care for a longer duration.



This could be the first experiment evolution took towards a prolonged childhood. Despite having brains only slightly larger than australopithecines or great apes, early Homo are believed to have lived longer.



The survival of a very old individual with no teeth for several years indicates that the group sufficiently cared for him. This alludes to a three-generation structure, a key aspect of <a href="https://www.earth.com/news/humans-started-cumulative-culture-around-600000-years-ago/" target="_blank" rel="noreferrer noopener">cultural transmission in humans</a>.



The new hypothesis begins with children's growth slowing down as cultural transmission increased. 



The accumulation of information from older to younger individuals had an advantageous effect on resource utilization and the development of complex behaviors, thus favoring a longer childhood. 



Once this mechanism was established, natural selection acted on cultural transmission, not just biological traits. 



<h2 class="wp-block-heading" id="h-big-brains-and-delayed-adulthood">Big brains and delayed adulthood</h2>



As the volume of transferrable information grew, evolution supported a larger brain and delayed adulthood, enabling a longer learning period in childhood and time to grow a bigger brain despite limited food resources.



The large brain of modern humans could be attributed to an extended childhood and a three-generation structure encouraging bio-cultural evolution. These mechanisms may have led to increased brain size, delayed adulthood, and longer lifespan. 



The study of this exceptional fossil could motivate researchers to rethink the evolutionary mechanisms that led to Homo sapiens.



The study is published in the journal <a href="https://www.nature.com/articles/s41586-024-08205-2" target="_blank" rel="noreferrer noopener">Nature</a>.



Image &amp; Video Credit: ESRF/Paul Tafforeau, Vincent Beyrand



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How did humans get big brains? Fossil teeth reveal new clues

The development of a big brain in humans and its connection to social bonding has been a hot topic of debate, and secrets found in fossil teeth may hold the answers. Researchers have been studying the fossilized teeth of an early Homo from Georgia, dating back approximately 1.77 million years. The research was made possible by the European Synchrotron in Grenoble, France. The findings suggest that despite having a small brain and reaching adulthood at a similar pace to great apes, these early humans had a prolonged...

Blue,Wildebeest,Stands,Eyeing,Camera,In,Grassland

Important human traits such as large brains emerged in Homo erectus about two million years ago. According to the widespread “meat made us human” hypothesis in Paleoanthropology, the evolutionary transition to modern humans is often linked to a major dietary shift involving an increase in meat consumption.&nbsp;



However, new research led by the <a href="https://www.gwu.edu/">George Washington University</a> calls into question this hypothesis, by arguing that the increase in archeological evidence for meat eating can largely be explained by greater research attention to that time period rather than fundamental shifts in hominid behavior.



“Generations of paleoanthropologists have gone to famously well-preserved sites in places like Olduvai Gorge looking for - and finding - breathtaking direct evidence of early humans eating meat, furthering this viewpoint that there was an explosion of meat eating after two million years ago,”&nbsp;said study lead author W. Andrew Barr, an assistant professor of Anthropology at the George Washington University.



“However, when you quantitatively synthesize the data from numerous sites across eastern Africa to test this hypothesis, as we did here, that ‘meat made us human’ evolutionary narrative starts to unravel.”



By compiling and analyzing data from nine major research areas in eastern Africa, including 59 sites dating between 2.6 and 1.2 million years ago, Professor Barr and his colleagues have found no sustained increase in the relative amount of evidence for a major shift to meat eating with the emergence of Homo erectus. These results suggest that previous intensive archeological sampling of places where meat eating played a large role, rather than overall changes in human behavior, could explain the prevalence of the “meat made us human” hypothesis in Anthropology.



“I’ve excavated and studied cut marked fossils for over 20 years, and our findings were still a big surprise to me,”&nbsp;said study co-author Briana Pobiner, a research scientist in the <a href="https://humanorigins.si.edu/">Human Origins Program</a> at the Smithsonian’s National Museum of Natural History.&nbsp;



“This study changes our understanding of what the zooarchaeological record tells us about the earliest prehistoric meat-eating. It also shows how important it is that we continue to ask big questions about our evolution, while we also continue to uncover and analyze new evidence about our past.”&nbsp;&nbsp;



“I would think this study and its findings would be of interest not just to the paleoanthropology community but to all the people currently basing their dieting decisions around some version of this meat-eating narrative. Our study undermines the idea that eating large quantities of meat drove evolutionary changes in our early ancestors,” concluded Professor Barr.



The study is published in the journal <a href="https://dx.doi.org/10.1073/pnas.2115540119">Proceedings of the National Academy of Sciences</a>.



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

What role did meat eating play in human evolution?

Important human traits such as large brains emerged in Homo...

A growing collection of studies has shown that global warming entails more than just higher temperatures. Extreme <a href="https://www.earth.com/news/how-does-extreme-weather-impact-marine-ecosystems/">weather</a> events are occurring more often and are becoming increasingly powerful in many parts of the world, necessitating an urgent need to forecast and prepare for them.



The results of a new modeling study led by the <a href="https://www.tsukuba.ac.jp/en/">University of Tsukuba</a> predict that "atmospheric rivers" will cause more frequent and severe extreme downpour events across East Asia.&nbsp;



Atmospheric rivers are long, narrow regions of concentrated water vapor moving across the atmosphere. When one of these bands collides with a barrier, such as a mountain range, it can result in significant rainfall or snowfall.



Parts of East Asia have been regularly subjected to this weather phenomenon over the last decade, sometimes at a great social cost. It is critical to understand how atmospheric rivers will evolve in the future as the climate continues to change.



“To investigate the behavior of atmospheric rivers and extreme precipitation over East Asia under projected climate warming, we used high-resolution global atmospheric circulation model simulations as well as regional climate model downscaling simulations," said study first author Professor Yoichi Kamae.



"We compared simulations based on historical meteorological data from 1951 to 2010 with future simulations based on the year 2090 under a climate scenario with 4 degrees Celsius of warming of the global-mean surface air temperature.”&nbsp;



Future simulations anticipated enhanced water vapor movement and precipitation, including extraordinary, record-breaking rainfall events in regions of East Asia, all of which would be influenced by atmospheric river phenomena.



The southern and western slopes of mountains in East Asia, including Japan, the Korean Peninsula, Taiwan, and northeastern China, received the most atmospheric river-related rainfall, with the southwestern slopes of the Japanese Alps receiving the most rainfall.



The geographical scope of this study was limited to East Asia due to technical restrictions in combining the models.



“Our findings are likely also applicable to other regions of the mid-latitudes where interactions between atmospheric rivers and steep mountains play a major role in precipitation, such as in western North America and Europe. These regions may also experience more frequent and intense extreme precipitation events as the climate warms.” explained Professor Kamae.



The Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan supported this research with JSPS KAKENHI Grants and the Integrated Research Program for Advancing Climate Models.



The study is published in the journal <a href="https://agupubs.onlinelibrary.wiley.com/journal/19448007">Geophysical Research Letters</a>.



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By <a href="http://mailto:ashikha92@gmail.com">Ashikha Raoof</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Projected atmospheric rivers could drench East Asia

A growing collection of studies has shown that global warming...

The Omicron variant is spreading all over the world at an alarming rate, reaching even the world’s most <a href="https://www.nytimes.com/live/2022/01/21/world/omicron-covid-vaccine-tests/omicron-extends-its-reach-to-some-of-the-planets-most-remote-islands">remote islands</a> – many of which managed to stay protected from the <a href="https://www.earth.com/news/llama-antibodies-have-potential-to-treat-coronavirus-variants/">coronavirus</a> for over two years before this highly contagious strain hit.&nbsp;



However, the situation in several countries, including previous epicenters such as South Africa and the United Kingdom, suggests that the Omicron waves are much shorter and less damaging than the Delta ones, with case numbers rising rapidly to unprecedented highs and afterwards steeply declining, and hospitalizations and deaths remaining relatively low. Currently, the United States also appears to have reached its Omicron peak, and is now embarking on its downward slope.&nbsp;



Sadly, hospitalization and death rates in the U.S. remain disproportionately high, compared to those in more vaccinated countries such as the UK, Spain, or Portugal. Three new studies led by the <a href="https://www.cdc.gov/">Center for Disease Control and Prevention</a> (CDC) and published on Friday, January 22, 2022 have highlighted the importance of mRNA (Pfizer BioNtech and Moderna) booster shots for preventing severe Omicron illness. These are the most comprehensive and reliable assessments to date of the role boosters played in United States’ Omicron wave.



In <a href="https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e3.htm?s_cid=mm7104e3_w">one study</a>, scientists investigated hospitalizations and emergency room visits from August 26, 2021 to January 5, 2022, and found that vaccine effectiveness against hospitalization with Omicron fell to 57 percent for people with two doses of mRNA vaccines, but that a third shot restored the protection to 90 percent.&nbsp;



A <a href="https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e2.htm?s_cid=mm7104e2_w">second study</a> analyzed nearly ten million Covid cases and over 117,000 associated deaths and found that booster shots reduced significantly the number of both symptomatic infections and deaths caused by Covid-19, particularly among people aged 50 and older.



Finally, a third study published in the journal <a href="https://jamanetwork.com/journals/jama/fullarticle/2788485">JAMA</a> has compared the effectiveness of booster shots against symptomatic infection with Delta, respectively Omicron, in over 70,000 people. While boosters are indeed less protective against symptomatic infection with Omicron than with Delta, they are still providing a much higher level of protection than vaccination with only two doses.



“The data here show the protection provided by vaccines and the importance of being up to date on your Covid-19 vaccination, which for tens of millions of Americans means getting a booster dose,” said CDC Director Rochelle Walensky.&nbsp;



“A booster is essential for preventing severe disease, hospitalization, and deaths,” added Eric Topol, a professor of Molecular Medicine at <a href="https://www.scripps.edu/">Scripps Research</a>. According to him, public health officials need to communicate clearly that, although the vaccines and booster shots are “not holding up against Omicron infections, they are holding up the wall against severe disease … and that’s phenomenal.”



Further research is needed to assess the usefulness of boosters in younger and healthier individuals. In the meanwhile, the need to initiate the vaccination scheme for a very large number of people in the United States and abroad remains crucial for avoiding future Covid-19 waves and the emergence of new - and possibly more deadly - coronavirus variants.&nbsp;&nbsp;&nbsp;



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

Covid booster shots are highly effective against hospitalization

The Omicron variant is spreading all over the world at...

Diplodocus,Dinosaur,Scene,From,The,Jurassic,Era,3d,Illustration

A team of researchers from the <a href="https://www.bristol.ac.uk/">University of Bristol</a> has recently reconstructed the limb musculature of Thecodontosaurus&nbsp;antiquus, a wolf-sized Triassic-period <a href="https://www.earth.com/news/new-dinosaur-species-discovered-in-brazil/">dinosaur</a> considered to be an early ancestor of the iconic long-necked, quadruped Diplodocus, and found that this magnificent creature ran on its two back legs and used its shorter forelimbs to grasp food.



“The University of Bristol houses a huge collection of beautifully preserved Thecodontosaurus fossils that were discovered around Bristol,” said study lead author Antonio Ballell, a paleobiologist at this university.&nbsp;



“The amazing thing about these fossilized bones is that many preserve the scars and rugosities that the limb musculature left on them with its attachment.” If they are well-preserved, these features - in tandem with an understanding of the musculature of closely-related, modern animal species - can be used to infer the shape and direction of dinosaur limb muscles, and shed more light on the way such dinosaurs looked and moved.&nbsp;



“In the case of dinosaurs, we have to look at modern crocodilians and birds, that form a group that we call archosaurs, meaning 'ruling reptiles.'&nbsp;Dinosaurs are extinct members of this lineage,” said Dr. Ballell. “Due to evolutionary resemblance, we can compare the muscle anatomy in crocodiles and birds and study the scars that they leave on bones to identify and reconstruct the position of those muscles in dinosaurs.”



By employing this methodology, Dr. Ballell and his colleagues inferred the orientation and size of Thecodontosaurus' limb muscles, and found that this dinosaur was able to run quite fast on its hind legs and likely used its forelimbs not to walk but rather to grasp various objects, such as food items.&nbsp;



These features are surprisingly different from Thecodontosaurus' giant sauropod relatives such as Diplodocus, who were slow, massive quadrupeds. However, according to the scientists, the muscular anatomy of Thecodontosaurus did show signs of having developed many of the structural features which will allow its descendants to switch to quadrupedalism and reach such colossal dimensions.



“From an evolutionary perspective, our study adds more pieces to the puzzle of how locomotion and posture changed during the evolution of dinosaurs and in the line to the giant sauropods,” said study senior author Michael Benton, a paleontologist at the University of Bristol.



A better understanding the anatomy of dinosaurs such as Thecodontosaurus will likely help scientists clarify how limb muscles modified in the evolution of multi-ton quadrupeds from tiny bipeds. “Reconstructing the limb muscles of Thecodontosaurus gives us new information of the early stages of that important evolutionary transition,” concluded Professor Benton.



The study is published in the journal <a href="https://royalsocietypublishing.org/doi/10.1098/rsos.211356">Royal Society Open Science</a>.



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

Thecodontosaurus could run fast on its hind legs

A team of researchers from the University of Bristol has...

A new study led by the <a href="https://www.ox.ac.uk/">University of Oxford</a> has found that black-browed albatrosses (Thalassarche melanophris) can dive up to 62 feet (19 meters) into the sea in pursuit of their <a href="https://www.earth.com/news/killer-whales-are-not-short-of-prey-in-southwestern-canada/">prey</a>, and can stay under water for up to 52 seconds – three times the maxima previously recorded for this species.



“Albatrosses are the iconic aerial wanderers of the oceans, supremely adapted for long-distance dynamic soaring flight. Perhaps because of this they are considered poorly adapted for diving in contrast to many smaller shearwater and petrel relatives, despite having amphibious eyes, and an&nbsp;a priori&nbsp;mass advantage for oxygen-storage tolerance,” wrote the study authors.&nbsp;



“Modern biologging studies have largely confirmed this view,&nbsp;casting doubt on earlier observations using capillary tube maximum depth gauges, which may exaggerate depths, and emphasizing albatrosses’ reliance on near-surface feeding.”



By using accelerometers, depth sensors, and GPS technology, the researchers studied the diving behavior of the albatross population of New Island (one of the Falkland Islands), and found that they can reach much more impressive depths in pursuit of prey than previously estimated.



Clarifying these issues is highly important for the conservation of these magnificent seabirds. According to the scientists, 15 of the 22 albatross species are currently at risk of extinction. One of the key drivers of their decline is <a href="https://www.earth.com/news/lighted-nets-help-protect-endangered-marine-wildlife/">accidental catch</a> in the hooked, baited fishing longlines used by commercial fisheries to trap large oceanic species such as tuna.&nbsp;



Since albatrosses were previously considered to be surface feeders, traditional approaches to protect them have only paid attention to the initial sinking of the fishing lines, without taking into consideration their possible bycatch during their deep dives.



“A better understanding of the unobserved behavior of the albatross and other endangered seabirds is essential to conservation efforts,” said study co-author Dr.&nbsp;Oliver Padget, a zoologist at the University of Oxford. “That black-browed albatrosses are physically capable of such deep dives will now need to be considered when thinking about the effectiveness of mitigation strategies that rely on the species being restricted to the surface.”



Moreover, the scientists noticed that black-browed albatrosses did not dive at night, suggesting that they rely on vision to track shoals of fish in the depths of the sea. “We found that deep diving was restricted to daylight hours,” said Dr. Padget. “So one potential mitigation could be for pelagic long lines to be set at night when albatross might be less likely, or able, to chase baits and become caught.”



The study is published in the journal <a href="https://doi.org/10.1016/j.cub.2021.11.036">Current Biology</a>.



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

Albatrosses can dive much deeper than previously thought

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

According to a new study led by <a href="https://www.stanford.edu/">Stanford University</a> and published in the journal Cell, male and female mouse <a href="https://www.earth.com/news/social-isolation-damages-our-brains/">brains</a> differ significantly. By probing four tiny structures within mouse brains that are known to be responsible for the so-called “rating, dating, mating, and hating” behaviors, the scientists found over 1,000 genes with different activity levels in the brains of one sex versus the other. Although this study focused on mice, the sex differences are likely to occur in the brains of humans too.



The genetic makeup of the brain most probably accounts for much of the sex-typical social behaviors, which have been built into animals’ brains over millions of years of evolution.&nbsp;



Male mice, for example, are able to quickly determine the sex of strangers intruding on their territory. The mice attack the strangers if they are male, or start courting them if they are female.&nbsp;



By contrast, female mice exhibit maternal rather than territorial aggression, and are much more genetically inclined to protect their pups than males. Moreover, their willingness to mate is strongly related to the stage of their estrous cycle.



“These primal behaviors are essential to survival and reproduction, and they’re largely instinctive,” and determined by the differential activation of various genes, explained study senior author Nirao Shah, a professor of Psychiatry, Behavioral Sciences, and Neurobiology at Stanford. “Using these&nbsp;genes as entry&nbsp;points, we’ve identified specific groups of brain cells that orchestrate specific sex-typical behaviors.”



“If you need to learn how to mate or fight once the situation arises, it’s probably already too late. The evidence is pretty clear that the brain isn’t purely a blank slate just waiting around to be shaped by environmental influences.”&nbsp;



“Mice aren’t humans,” he added. “But it’s reasonable to expect that analogous brain cell types will be&nbsp;shown to play roles in our sex-typical social behaviors.”



Professor Shah and his colleagues also discovered over 600 differences in gene-activation levels between females in different phases of their estrous cycle.&nbsp;



“To find, within these four tiny brain structures, several hundred genes whose activity levels depend only on the female’s cycle stage was completely surprising,” said Shah. The differential activation of these genes regulates females’ estrogen and progesterone levels at different stages of their estrous cycle, and strongly influence their behaviors, such as sexual receptivity.&nbsp;



Finally, some of the genes identified by the researchers are known to be risk factors for various brain disorders in humans, including multiple sclerosis (MS), <a href="https://www.earth.com/news/drinking-coffee-protects-against-alzheimers-disease/">Alzheimer’s disease</a>, or autism. For example, genes linked to increased risk of MS and Alzheimer’s, which tend to afflict women more than men, are more activated in the brains of female mice, whereas genes related to autism, an illness four times more common in men, are more active in the brains of male mice.&nbsp;



Further research is needed to map in greater detail the sex-related genetic differences between male and female mice, and to assess the similarities and differences between mice and human genomes.



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

Sex differences are driven by genetic activity in the brain

According to a new study led by Stanford University and...

New research published in the journal <a href="about:blank">Current Biology</a> has found that using LED illuminated nets greatly reduced <a href="https://www.earth.com/news/dynamic-ocean-closures-offer-protection-from-accidental-catch/">accidental catch</a> of sharks, rays, sea turtles or other unwanted fish. This leads to a win-win situation for commercial fisheries and marine wildlife.



Gillnets are one of the most widely used fishing gear in coastal areas of the world’s oceans. However, using them often results in the bycatch of animals not targeted by fishers, including endangered, threatened, or protected species such as sharks, rays, sea turtles, or seabirds. This incidental catching of non-target species has contributed to declines in endangered species and has negatively impacted coastal ecosystems.&nbsp;



Luckily, during the last decade, increasingly more LED illuminated gillnets have been manufactured, which proved to be a highly effective solution to the problems entailed by accidental catch. A research team led by <a href="https://www.asu.edu/">Arizona State University</a> (ASU) and the <a href="https://www.wcs.org/">Wildlife Conservation Society</a> attached green LED lights every ten meters on gillnets along the Pacific Coast of Baja California Sur, Mexico to assess to what extent could this method reduce bycatch.



The scientists were amazed to find that using this gear reduced total fisheries bycatch by 63 percent, including a 95 percent reduction in the accidental catch of sharks, skates, and rays, an 81 percent reduction in incidental trapping of Humboldt squids, and a 48 percent reduction in catching unwanted finfish. Fortunately for fishers, this technology still allowed continued catches of targeted species, while significantly reducing bycatch.



“These results demonstrate that the potential benefits of illuminated nets extend well beyond sea turtles, while demonstrating the strong promise for net illumination to mitigate discarded bycatch in similar coastal gillnet fisheries throughout the world’s oceans,” said study lead author Jesse Senko, an expert in animal behavior and fisheries management at ASU.



“Making life easier for fishers by reducing the amount of time untangling bycatch is equally essential as reducing the bycatch biomass in nets,” added study co-author John Wang, a fisheries ecologist at the <a href="https://www.fisheries.noaa.gov/about/pacific-islands-fisheries-science-center">Pacific Islands Fisheries Science Center</a>.



“It is important for fishers to know that there are tangible benefits for them. This is critical for the adoption of such technologies by the fishing industry,” he concluded.



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

Lighted nets help protect endangered marine wildlife

New research published in the journal Current Biology has found...

New research led by the <a href="https://www.washington.edu/">University of Washington</a> has found that a substance in pomegranates called “urolithin A” could be used to create novel anti-aging treatments that strengthen muscles and mitochondrial health and thus protect against frailty in old <a href="https://www.earth.com/news/space-travel-may-cause-premature-aging/">age</a>.



Urolithin A is a by-product of a person’s gut bacteria and a diet rich in polyphenols – substances found in pomegranates, berries, and nuts. Since several factors, including age, diet, genetics, or illness, affect the composition of the gut microbiome, people produce urolithin A at different rates. Now, this substance is also available in pill and powder supplements found in health food stores.



Both in its natural and synthetic form, urolithin A boosts the mitochondria – our cell’s “power stations” – which tend to run down with age, causing muscle weakening and frailty. According to scientists, urolithin A helps the body recycle mitochondria by stimulating a process called mitophagy.



“Mitochondria&nbsp;are like batteries that power the cells in your body,” said study senior author David Marcinek, an expert in the role of mitochondria in human metabolism at the University of Washington.



“But over time, they break down. The process of mitophagy recognizes this failure and proactively tears down the mitochondria, reducing it to elemental components that a cell can reuse. But with aging, mitophagy becomes less efficient and your body accumulates this pool of failing mitochondria. It’s one way that muscles become less functional as we age.”



Professor Marcinek and his colleagues enrolled 66 participants who randomly received either 1,000 mg of an urolithin supplement daily for four months or a placebo. At the beginning of the experiment, they had lower levels of adenosine triphosphate (ATP), a substance produced by mitochondria that helps cell function properly.



The scientists found that the supplement group’s fitness and ATP production improved significantly after the treatment, suggesting that urolithin A may indeed help restore bodily capacities in the elderly.



“Even though we did not observe an effect of the supplement in whole body function,” Professor Marcinek said, “these results are still exciting because they demonstrate that just taking a supplement for a short duration actually improved muscle endurance. Fatigue resistance got better in the absence of exercise.”



“I think these changes suggest that&nbsp;the treatment affects&nbsp;the metabolic condition of people. Even though it didn’t affect the maximum ATP production, it improved test subjects’ general metabolism. Just getting them over that point where exercise is possible – a walk around the block or climbing some stairs – might help a person build their own health,” he concluded.&nbsp;



The study is published in the journal <a href="https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2788244?utm_source=For_The_Media&amp;utm_medium=referral&amp;utm_campaign=ftm_links&amp;utm_term=012022">JAMA Network Open</a>.



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

Pomegranates contain an anti-aging substance

New research led by the University of Washington has found...

Portrait,Of,White,â??,Haired,Senior,Woman,Relaxing,At,Home

Pope Francis has recently come under fire for his comments about human parenting and companion animals. In a statement made on January 5, the Catholic leader suggested that not having children and living with cats and <a href="https://www.earth.com/news/tens-of-thousands-of-rescue-dogs-impacted-by-cdc-ban/">dogs</a> are selfish acts.



“Many couples do not have children because they do not want to, or they have just one – but they have two dogs, two cats," the Pope said. "And this denial of fatherhood or motherhood diminishes us, it takes away our humanity... a man or woman who does not develop the sense of fatherhood or motherhood, they are lacking something, something fundamental, something important.”



The Pope’s statement was criticized by In Defense of Animals’ Interfaith Vegan Coalition and the <a href="https://www.compassionconsortium.org/">Compassion Consortium</a>. Reverend Sarah Bowen is the animal chaplain and co-founder of the Compassion Consortium.



“Animal lovers around the world gasped, yet Pope Francis’ words offer us all an opportunity to deeply consider our relationships with other species," said Reverend Bowen.&nbsp;



"With all due respect to the pope, in a time of climate crisis, economic pressure, war, poverty, hunger, and anthropogenic violence, some of us are lacking nothing by choosing not to have children."&nbsp;



"Rather we are gaining something: true respect and reverence for the complexities of living in an interspecies world where the needs of human animals and other-than-human animals are often in conflict and always entangled.”



For some, the Pope’s words came as a surprise considering that in the past he’s celebrated non-human life and called for respect for the environment we all depend on. In “Laudato Si” his 2015 encyclical on the environment he wrote: “Because all creatures are connected, each must be cherished with love and respect.”



Many animal advocates and environmentalists see the Pope’s most recent comments as a move in the wrong direction - away from meaningful connection with the non-human world.&nbsp;



“Many of our most pressing problems today, including the sixth mass extinction of wild animals, have resulted from human beings’ disconnection of and fear of nature," said Judy Carman, co-founder of the Interfaith Vegan Coalition. "For many, a family dog, cat or bunny may be their only connection to the world of interspecies communication.”&nbsp;



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

Pope criticized for comments on companion animals

Pope Francis has recently come under fire for his comments...

Healthy,Food,,Plate,With,Greek,Salad,Of,Mediterranean,Diet,,Tomatoes

A new study shows that adults 65 and older who follow the Mediterranean diet live longer. Interestingly, adherence to the Mediterranean diet was assessed by analyzing biomarkers in plasma and urine, which is a unique approach.



Professor Cristina Andrés-Lacueva is head of the Research Group on Biomarkers and Nutritional &amp; Food Metabolomics of the Faculty of Pharmacy and Food Sciences of the <a href="https://www.ub.edu/web/portal/en/">University of Barcelona</a> (UB) and the CIBER on Fragility and Healthy Ageing (CIBERFES).



According to Professor Andrés-Lacueva, her team developed an index of dietary biomarkers based on <a href="https://www.earth.com/news/air-pollutants-confuse-pollinators-and-reduce-food-production/">food</a> groups that are part of the Mediterranean diet, and then assessed their association with mortality. Professor Andrés-Lacueva is also head of the research group in Ciber on Fragility and Healthy Aging (CIBERFES).



The research was carried out over 20 years, using data from 642 participants who were 65 years and older and resided in the Tuscany region of Italy.&nbsp;



The scientists looked at the following biomarkers: polyphenols and resveratrol metabolites (from grape consumption), plasma carotenoids, selenium, vitamin B12, fatty acids and the proportion of monounsaturated and saturated fatty acids.&nbsp;



Using a model and a food questionnaire, the scientists were able to ascertain how closely each participant followed a Mediterranean diet. During the course of the twenty-year study, 425 participants died - 139 from cardiovascular disease and 89 from cancer related causes.&nbsp;



When analyzed, the biomarkers associated with a Mediterranean diet were inversely related to all causes of death. This means that the health benefits of a Mediterranean diet can boost longevity.



Tomás Meroño, co-first signatory of the study, said the study confirms that adherence to the Mediterranean diet (assessed by a panel of dietary biomarkers) is inversely associated with the long-term mortality in older adults, which supports the use of these biomarkers in monitoring evaluations to study the health benefits associated with the Mediterranean diet.



"A healthy diet is considered one of the fundamental factors to achieve healthy aging," wrote the study authors. "Indeed, a growing body of epidemiological evidence shows that the Mediterranean diet (MD) may delay or prevent frailty, cognitive decline, and the onset of many chronic diseases in older subjects."&nbsp;



"Furthermore, several observational studies, including the European Prospective study into Cancer and Nutrition (EPIC)-elderly study, a cohort of 74,607 men and women aged ≥60 years, have shown inverse associations between a greater adherence to different MD scores (MDS), in both the Mediterranean and non-Mediterranean countries, and total mortality."



The study is published in the journal <a href="https://bmcmedicine.biomedcentral.com/">BCM Medicine</a>.



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

Mediterranean diet can lead to longer life

A new study shows that adults 65 and older who...

The power of positive thinking came to the forefront in recent research conducted by scientists at <a href="https://www.osu.edu/">The Ohio State University</a>. The study revealed that people who were in a sad <a href="https://www.earth.com/news/dark-chocolate-triggers-mood-boosting-changes-in-the-gut/">mood</a> improved more quickly when they used a therapeutic method that they believed to be aligned with their strongest skill. These participants improved more quickly than people asked to use a skill that they believed to be a relative weakness.



“We found that it helps people to think they’re working with their strengths rather than with something they see as a weakness,” said study lead author&nbsp;<a href="https://scholar.google.com/citations?user=WD5esBUAAAAJ&amp;hl=en">Samuel Murphy</a>.



The unusual thing about this study was that the participants were randomly told what their strong skill was, regardless of whether this was true or not. What was important was not if the participants actually had their assigned skill in abundance, but if they believed they had it.



“Our results suggest that whether participants were good at the skill was not relevant. It was the belief that they were good at that skill that made it effective,” explained study co-author Professor&nbsp;<a href="https://psychology.osu.edu/people/strunk.20">Daniel Strunk</a>.



For the investigation, 616 undergraduate participants were introduced to two different therapy skills, one using a cognitive approach and the other using mindfulness. The participants were told that these therapy skills could be useful in their daily lives.&nbsp;



Cognitive skills were defined as identifying and re-evaluating negative thoughts and beliefs.&nbsp;Mindfulness skills were defined as awareness and acceptance of one’s thoughts and feelings without trying to change them.



Participants were then given a hypothetical situation in which they could use these skills – feeling hurt by not being invited to a social event by a friend – and directed to practice both skills and complete some questionnaires on how they used them. Following this exercise, the researchers told each participant which one, cognitive or mindfulness, was his or her stronger skill. In reality, however, the participants were simply assigned to each skill group randomly.



The participants then underwent a “sad mood induction,” during which they were told to imagine vividly that someone they cared about was dying, while at the same time they listened to the sad song “Russia under the Mongolian Yoke,” played at half speed to make it sound even sadder. They then had to use the therapy skills to help themselves recover from the sad mood and they completed five mood assessments in the minutes following the completion of the sad mood induction.



In one last requirement, half of those who were told that mindfulness was their stronger skill had to use cognitive skills (their weaker strategy) to recover from the sad mood, while the other half had to use mindfulness (their stronger strategy). Similarly, those participants who were told that a cognitive approach was their stronger skill had to use mindfulness when dealing with a sad mood, while the other half had to use cognitive strategies.



The results showed that all of the participants saw their sad mood gradually improve after the induction was over. Whether they were asked to use cognitive or mindfulness skills had no significant effect on mood recovery – but the framing of whether they were told it was their strongest or weakest skill did make a difference.



Participants who used the skill they had been told was their strongest - regardless of whether it was cognitive or mindfulness - saw a bigger improvement in mood than participants who worked with a skill they had been told was their weakest.



The study authors could not explain why framing the therapy skill as a strength resulted in a more rapid mood recovery.&nbsp;



“It may be that if there is this initial encouragement early on that they are really good at one particular strategy, that may inspire greater confidence and persistence in using this skill, which leads to better results,” said Murphy.



Or it may be the other way around: “People may be discouraged if they’re told a particular skill is their weakness and then not try as hard or be as confident that it will work,” Strunk said.



The researchers noted that the findings may be helpful to therapists who focus on building clients’ strengths. “It is very easy to let clients know that you’re building on their strengths, so if it enhances the benefit, that will be important to try,” said Murphy.



This approach is particularly relevant currently as psychotherapists focus more on encouraging clients to use their skills to help deal with and solve their own problems, rather than being dependent on the therapist to “fix” the problems. This represents a paradigm shift and psychotherapists are still learning how to maximize their success in this approach.



“How therapists frame the treatment for a client may play an important role in how well it works. Telling clients that you’re going to be working on their strengths may further enhance the effectiveness of their treatment,” Strunk said.



“We only studied mindfulness and cognitive skills here, but there are a variety of approaches to improving mental health,” he said. “The ones that you think would work best for you probably will indeed work best.”



The study is published in the <a href="https://onlinelibrary.wiley.com/journal/10974679">Journal of Clinical Psychology</a>.



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

Focusing on your strongest skills can improve your outlook

The power of positive thinking came to the forefront in...

A new study has revealed that the equivalent of 61 million olympic-sized pools of fresh <a href="https://www.earth.com/news/the-sun-may-be-the-original-source-of-earths-water/">water</a> were released into the seas near South Georgia when "mega" iceberg A68A melted over three months from 2020 to 2021.&nbsp;



In July 2017, the iceberg broke off the Larsen-C Ice Shelf on the Antarctic Peninsula and began an incredible 4,000 kilometer journey across the Southern Ocean over threw and a half years. The British Antarctic Survey (BAS) monitored the berg’s location, and how it’s area and thickness changed over time via satellite technology.&nbsp;



“A68 was an absolutely fascinating iceberg to track all the way from its creation to its end," said Laura Gerrish, GIS and mapping specialist at BAS. "Frequent measurements allowed us to follow every move and break-up of the berg as it moved slowly northwards through iceberg alley and into the Scotia Sea where it then gained speed and approached the island of South Georgia very closely.“



The amount of water released from the melting iceberg could have far reaching consequences. It’s unknown what impact the release of 152 billion tonnes of fresh water near an island like South Georgia will be.&nbsp;



“This is a huge amount of melt water, and the next thing we want to learn is whether it had a positive or negative impact on the ecosystem around South Georgia," said study lead author Anne Braakmann-Folgmann, a researcher at CPOM and PhD candidate in the School of Earth and Environment at the <a href="https://www.leeds.ac.uk/">University of Leeds</a>.



Because the technological ability to track icebergs via satellite is relatively new, scientists hope to harness this ability to learn even more. A68A took a common route while crossing the Drake Passage, so it could tell us a lot about icebergs and their impact on polar oceans.&nbsp;



“Our ability to study every move of the iceberg in such detail is thanks to advances in satellite techniques and the use of a variety of measurements," said Tommaso Parrinello, CryoSat Mission Manager at the European Space Agency.



Imaging satellites record the location and shape of the iceberg and data from altimetry missions add a third dimension as they measure the height of surfaces underneath the satellites and can therefore observe how an iceberg melts. “



The study is published in the journal <a href="https://www.journals.elsevier.com/remote-sensing-of-environment">Remote Sensing of Environment</a>.



---



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

Mega iceberg released 152 billion tons of fresh water

A new study has revealed that the equivalent of 61...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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

Flu viruses are more flexible than expected

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

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&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.

Kainji Lake in north central Nigeria

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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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.

Designing crops that can beat the heat

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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

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



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.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features 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://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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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.

Wetlands are a major source of methane emissions

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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



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

The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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Today’s Video of the Day from <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes why experts are studying zebrafish to gain a better understanding of how the immune system responds to injury. Zebrafish have the ability to repair and regenerate organs.



“Organ regeneration offers an exciting opportunity for studying the immune system and to inquire why some species can regenerate organs like the heart or missing limbs while others like humans cannot,” explained Dr. Tatjana Piotrowski.



Zebrafish sensory organ hair cells are an ideal system to investigate the pathways and cell types involved in regeneration since they are easily destroyed with antibiotics and begin regenerating within five hours. This enabled the researchers to identify the exact timing and genetic programs for each anti-inflammatory macrophage activation state.&nbsp;



“Our hypothesis is that human macrophages do not receive the proper chemical activation 'cocktail' to instruct pro-regenerative processes,” said Dr. Nicolas Denans. “Identifying the molecular recipe of macrophage activation in zebrafish may one day enable us to design regenerative immunotherapies in humans.”&nbsp;&nbsp;&nbsp;



“The new evidence is a valuable resource for comparative studies on the genetic programs involved in macrophage-mediated repair and regeneration. In other words, different types of injuries may induce different kinds of inflammatory responses. We want to decipher whether this 'language' is universal or if there are a variety of dialects."



Video Credit: Stowers Institute for Medical Research&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.

How the immune system responds to injury

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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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.

2022 illustrated the consequences of a warming climate

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



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



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

Tiger sharks are shifting poleward as temperatures rise

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