The inclusion of fiber in the diet has been linked to a variety of health perks for decades. The body needs this essential nutrient to keep digestion running smoothly and maintain steady blood sugar levels.&nbsp;



Most experts recommend at least 25 grams per day for women and 38 grams for men, yet many adults in the United States barely reach half that goal. But there is more to this story than a happy belly or balanced glucose.&nbsp;



A recent study in Nature Metabolism shows that fiber may also leave a mark on our genes.



<h2 class="wp-block-heading" id="h-why-fiber-still-matters">Why fiber still matters</h2>



Fiber comes in many forms, from the crunchy stems of leafy greens to the chewy shells of beans and nuts. <a href="https://www.earth.com/news/want-to-lose-weight-try-eating-more-protein-and-fiber/" target="_blank" rel="noreferrer noopener">Dietary fiber</a> travels to the large intestine, where friendly bacteria feast on it.&nbsp;



This feast produces short-chain fatty acids, including propionate and butyrate, which have gained attention recently for their effects on gut health.



Researchers have been eager to see whether these acids from fibers impact genes beyond basic energy production.



<h2 class="wp-block-heading" id="h-fiber-gut-and-fatty-acids">Fiber, gut, and fatty acids</h2>



The science behind short-chain fatty acids and genes has intrigued experts for years, and now <a href="https://med.stanford.edu/profiles/michael-snyder" target="_blank" rel="noreferrer noopener">Michael Snyder</a>, Stanford B. Ascherman Professor of Genetics at <a href="https://www.stanford.edu" target="_blank" rel="noreferrer noopener">Stanford University</a>, has shed more light on it through this project. 



His team traced the biological footprints of propionate and butyrate in both <a href="https://www.earth.com/news/fiber-rich-diets-reduce-antimicrobial-resistance-in-the-gut/" target="_blank" rel="noreferrer noopener">normal cells</a> and cancer cells. 



The aim was to see how these acids might switch genes on or off in ways that influence the growth and survival of cells.



<h2 class="wp-block-heading" id="h-how-fiber-impacts-genes-nbsp">How fiber impacts genes&nbsp;</h2>



Short-chain fatty acids are generated when gut microbes break down fiber. They move into the bloodstream and can reach different tissues.&nbsp;



The study found that propionate and butyrate attach to certain sites on histones - which are proteins that act like spools for DNA - causing direct modifications on genes related to cell division and cell death.



“We found a direct link between eating fiber and modulation of gene function that has anti-cancer effects,” said Snyder.



Instead of simply describing fiber’s link to good health, the researchers pinpointed the exact molecular changes behind those benefits.



<h2 class="wp-block-heading" id="h-preventing-uncontrolled-cell-growth">Preventing uncontrolled cell growth</h2>



Cancer often begins when cells lose their usual checks and balances. Normal cells are expected to grow, specialize, and sometimes self-destruct if there’s a problem.&nbsp;



When those processes go haywire, mutated cells can survive too long or multiply too fast. The study uncovered how certain chemical markers on genes for cell regulation might switch in a protective way when these short-chain fatty acids are around.



It is generally the case that people’s diets are very poor in fiber. Adjusting meal plans to include foods like beans, nuts, <a href="https://www.earth.com/news/certain-vegetables-protect-us-from-illness-by-strengthening-the-lung-barrier/" target="_blank" rel="noreferrer noopener">cruciferous vegetables</a>, or <a href="https://www.earth.com/news/eating-one-avocado-each-day-can-add-years-to-your-life/" target="_blank" rel="noreferrer noopener">avocados</a> may promote the production of more of these acids, potentially offering some defense against abnormal cell growth.



<h2 class="wp-block-heading" id="h-why-gut-and-genes-might-need-more-fiber">Why gut and genes might need more fiber</h2>



A diet that skimps on fiber starves the microbes that produce these beneficial fatty acids. Low levels can reduce the supply of butyrate and propionate.



That could leave you short on important chemical signals that appear to help keep unwanted cellular behavior under control.&nbsp;



According to the <a href="https://nutritionsource.hsph.harvard.edu/carbohydrates/fiber/" target="_blank" rel="noreferrer noopener">Harvard T.H. Chan School of Public Health</a>, most Americans only consume around 15 grams of fiber daily, which falls short of <a href="https://nutritionsource.hsph.harvard.edu/carbohydrates/fiber/" target="_blank" rel="noreferrer noopener">recommended amounts</a>.



<h2 class="wp-block-heading" id="h-cancer-risk-and-fiber-s-gene-protective-role">Cancer risk and fiber’s gene-protective role</h2>



Colon cancer is a <a href="https://www.earth.com/news/the-cooking-oils-in-your-diet-may-be-linked-to-cancer/" target="_blank" rel="noreferrer noopener">concern for many adults</a>. The <a href="https://www.cancer.org/cancer/colon-rectal-cancer.html" target="_blank" rel="noreferrer noopener">American Cancer Society</a> estimates that about 1 in 23 men and 1 in 25 women will be diagnosed with colon cancer at some point in their lifetime. 



This new study provides a window into how the byproducts of fiber breakdown might influence gene behavior in the colon, and possibly other tissues, in a helpful way.



“By identifying the gene targets of these important molecules we can understand how fiber exerts its beneficial effects,” said Snyder.&nbsp;



Although more work is needed to confirm how each type of fiber interacts with the gut and the rest of the body, this adds to growing evidence that diet and cancer risk are tightly woven together.



<h2 class="wp-block-heading" id="h-connection-between-diet-gut-and-genes">Connection between diet, gut, and genes</h2>



The research highlights the importance of diet as a modulator of genetic signals. 



It also emphasizes potential opportunities for personalized strategies that combine better eating habits with therapies aimed at correcting harmful gene activity.&nbsp;



Many clinicians see fiber as a key feature of a balanced diet, and these findings may prompt more specific guidelines on how much and which types of fiber are most valuable for long-term health.



<h2 class="wp-block-heading" id="h-what-foods-can-boost-fiber-intake">What foods can boost fiber intake?</h2>



Whole grains, nuts, seeds, and legumes remain <a href="https://www.earth.com/news/ketogenic-diet-may-help-the-body-kill-cancer-cells/" target="_blank" rel="noreferrer noopener">top options</a> for boosting your daily fiber count. Vegetables like Brussels sprouts and broccoli, as well as fruits such as raspberries, also offer generous amounts.&nbsp;



Even small shifts like opting for a whole-wheat tortilla instead of a white-flour tortilla can push your numbers up. 



For individuals who struggle to reach recommended targets, talking with a healthcare provider or a registered dietitian can point the way to practical changes that nourish both you and your gut bacteria.



People sometimes balk at the thought of adding more plant-based foods to their <a href="https://www.earth.com/news/which-dietary-changes-are-best-for-cancer-prevention/" target="_blank" rel="noreferrer noopener">diet</a>. But a gradual introduction may help your gut adjust without uncomfortable bloating or gas.&nbsp;



Your digestive system, along with your genes, could benefit from these simple swaps, especially as ongoing research on fiber clarifies the links between short-chain fatty acids and various cellular pathways.



<h2 class="wp-block-heading" id="h-future-of-health-research">Future of health research</h2>



All signs suggest that fiber is more than just a helper for digestion. These insights about short-chain fatty acids may prompt further collaboration between nutrition science and genetics.&nbsp;



By paying attention to what our microbes need, we may discover fresh paths to protect our cells from harm. The study is published in <a href="https://www.nature.com/articles/s42255-024-01191-9" target="_blank" rel="noreferrer noopener">Nature Metabolism</a>.



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Eating enough fiber prevents cancer in a surprising way

The inclusion of fiber in the diet has been linked to a variety of health perks for decades. The body needs this essential nutrient to keep digestion running smoothly and maintain steady blood sugar levels.&nbsp; Most experts recommend at least 25 grams per day for women and 38 grams for men, yet many adults in the United States barely reach half that goal. But there is more to this story than a happy belly or balanced glucose.&nbsp; A recent study in Nature Metabolism shows that fiber may...

<a href="https://www.earth.com/news/record-breaking-wildfire-years-are-just-getting-started/">Wildfires</a> have often been a significant environmental problem, particularly in areas with drier and hotter climates such as the western United States. However, four decades ago, cool, moist nights regularly provided relief for firefighters, and so-called “flammable nights” were an extremely rare event. 



Now, due to climate change, the nights are warming even faster than days. According to a new study led by the <a href="https://www.colorado.edu/">University of Colorado Boulder</a> (CU Boulder), there are 11 more flammable nights in the U.S. West every year – a 45 percent increase since 1979.



“People tend to pay more attention to conditions during the daytime: when fires are most active,” said study co-author Adam Mahood, a postdoctoral associate in CU Boulder’s <a href="https://earthlab.colorado.edu/">Earth Lab</a>. “But there’s not enough attention put on nighttime: when cooler conditions tend to slow fires down or even extinguish them completely.”&nbsp;



“Night is the critical time for slowing a speeding fire - and wildfire’s night brakes are failing,”&nbsp;added study lead author Jennifer Balch, the director of the Earth Lab.



The scientists analyzed satellite observations and hourly climate data for 81,000 global wildfires, and identified variations in the Vapor Pressure Deficit (VPD) – a key measurement of the “thirst of the atmosphere,” signaling the level of atmospheric heat and dryness – in order to determine the VPD tipping points when the air became hot and dry enough to allow wildfires to burn unabated during nighttime too. The results revealed a seven-days increase in flammable nights per year in a fifth of burnable lands around the globe, and an 11-days rise in the U.S. West over the past four decades (1979-2020).



By using a novel remote sensing and modeling technique to evaluate fire progression hourly for a large number of wildfires, the researchers also found that, globally, the night fires have become 7.2 percent more intense from 2003 to 2020, with a staggering 28 percent increase in intensity in the U.S. West. Moreover, the results shown a 36 percent increase of flammable nighttime hours during this period, compared to a 27 percent increase of daytime flammable hours. The most affected ecosystems were evergreen and broadleaf forests, shrublands, and grasslands.



“With continued nighttime warming, we expect to see more runaway wildfires that are more intense, faster, and larger. That means firefighters don’t get the breaks at night they used to get - they have to battle flames 24/7,” concluded Professor Balch.



The study is published in the journal <a href="https://dx.doi.org/10.1038/s41586-021-04325-1">Nature</a>.&nbsp;



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

Fires are intensifying with an increase in "flammable nights"

Wildfires have often been a significant environmental problem, particularly in...

Biologists have long argued that the vast majority of our planet’s animal and plant <a href="https://www.earth.com/news/species-suffer-a-second-extinction-when-society-forgets-about-them/">species</a> remain undiscovered. While many of these species inhabit environments that are extremely hard to reach, some of them may in fact be hiding in plain sight.&nbsp;



For instance, a tiny parasitoid wasp known since 1843 (Ormyrus labotus) has long been considered a generalist, laying its eggs in over 65 different species of insects. However, a new genomic study led by the <a href="https://uiowa.edu/">University of Iowa</a> has discovered that the wasps currently called Ormyrus labotus actually belong to at least 16 different species that are identical in appearance but genetically distinct. While discovering “cryptic species” within one known insect species is not unusual, the number of those found among these wasps is impressive.



“We know so much from ecology about how important even the smallest species can be to an ecosystem, such that uncovering this hidden diversity - and, maybe more importantly, understanding the biology of each species - becomes a critical component of conservation and maintenance of ecosystem health,” said study senior author Andrew Forbes, an associate professor of Biology at the University of Iowa.



Between 2015 and 2019, Professor Forbes and two of his graduate students, Sofia Sheik and Anna Ward, were involved in a research project investigating insects that laid their eggs on plants where their larvae hatched, inducing the plants to form protective structures called “galls” around the larvae.&nbsp;



Since wasps in the genus Ormyrus are known to parasitize such insects, it has not been surprising to find many such wasps emerging from the oak galls that the team collected. However, it was strange to see the same type of wasp emerging from a huge variety of gall types.



“It seemed highly unusual for one parasitoid species to be able to exploit such a wide and dynamic set of hosts,” says study lead author Sofia Sheikh, a former MSc student in Forbes’ lab and currently a doctoral student at the <a href="https://www.uchicago.edu/">University of Chicago</a>.



By examining DNA samples from each of the wasps that emerged from the galls, the researchers were surprised to find that the wasps which originally appeared to belong to a single species were in fact part of 16, and possibly even 18, distinct species.



These findings highlight the importance of biodiversity research and its implications. For example, if these wasps would even be enlisted for control of an invasive oak-galling pest, it would be highly important to know which particular wasp species targeted that specific pest species. Moreover, failing to distinguish between specialist and generalist insects hinders scientists’ ability to understand actual generalists and what enables them to target a variety of hosts.



“More so than any specific number of potential new species, I am excited about how this study and many others are revealing a plethora of cryptic diversity. This, to me, suggests that we still have a lot to learn about the processes that structure species interactions with each other and their environments,” concluded Sheikh.&nbsp;



The study is published in the journal <a href="https://dx.doi.org/10.1093/isd/ixac001">Insect Systematics and Diversity</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

Scientists reveal hidden diversity among parasitoid wasps

Biologists have long argued that the vast majority of our...

A new study shows that dogs can recognize their human <a href="https://www.earth.com/news/dairy-calves-prefer-to-be-housed-with-a-companion/">companions</a> by voice alone. The study carried out by researchers at Eötvös Loránd University (ELTE) in Hungary eliminated smell and sight as identifying features, confirming that dogs can identify familiar voices.&nbsp;



To carry out the research, scientists recruited 28 human-dog pairs to play a game of hide and seek. The humans were asked to hide behind one of two hiding spots while a stranger was placed behind the other. The owner’s voice was played from where the owner hid and the stranger’s voice was played from where the stranger hid. The recordings were in neutral voices of the people reading recipes.&nbsp;



The dogs were allowed to choose which hiding spots to approach. The test was repeated with 14 different stranger voices, some similar and some very different from the owner’s voice. In 82 percent of cases, dogs found their owners.&nbsp;



To control for smell, the last two rounds of the study were carried out with the stranger playing the owner’s voice. The dogs still went toward their human’s voice, showing they were not using their sense of smell to guide them.&nbsp;



The scientists discussed the ways in which dogs were able to identify human voices. Differences in pitch and noisiness helped the dogs recognize familiar humans, but it appears that timbre and other qualities didn’t make a difference.&nbsp;&nbsp;&nbsp;



“People mostly make use of three properties: pitch (higher or lower), noisiness (cleaner or harsher), and timbre (brighter or darker) to differentiate others. Dogs may make use of the same voice properties or different ones. If two voices differ in a property that matters for dogs, decisions should be easier," explained study lead author Anna Gábor.&nbsp;



The research is unique and verifies something most dog owners already suspect, giving us a window into dog cognition.&nbsp;



"Dogs’ high choosing success rate, their ability to discriminate their owner’s voice from a variety of control voices, and the fact that dogs’ choices were not confounded by either olfactory cues or speaker order indicate that dogs can reliably use identity cues carried by speech," wrote the study authors.&nbsp;



Andics Attila is the leader of the Neuroethology of Communication Lab, where the study was conducted.&nbsp;



“This is the first demonstration that dogs can tell apart their owner’s voice from many others," said Attila. "The study also shows that dogs make use of some, but only some of the same voice properties as humans do to recognize who is talking.”&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

Dogs recognize familiar human voices

A new study shows that dogs can recognize their human...

Wells,,Maine,,February,1,,2021-winter,Storm,Waves,Crash,Over,The

At the current rate of global warming, <a href="https://www.earth.com/news/sea-levels-are-rising-at-an-alarming-rate/">sea levels</a> along the coastal United States will likely rise by a foot (approximately 30 centimeters) or even more by 2050, according to a new <a href="https://oceanservice.noaa.gov/hazards/sealevelrise/sealevelrise-tech-report.html">technical report</a> released on Tuesday, February 15, 2022 by the <a href="https://www.noaa.gov/">National Oceanic and Atmospheric Administration</a> (NOAA). By the end of the century, this value could reach a disastrous two feet, if no urgent measures are taken to mitigate climate change.



“What we’re reporting out is historic,” said Richard Spinrad, the NOAA administrator. “The United States is expected to experience as much sea level rise in the next 30 years as we saw over the span of the last century.” According to Dr. Spinrad, while cutting greenhouse gas emissions to curb global warming is crucial for the longer-term future, the projected sea level rise by 2050 “will happen no matter what we do about emissions.”



This substantial rise will create a massive increase in the frequency of coastal flooding, even in the absence of storms or heavy rainfall, putting over 140,000 houses at risk of “chronic inundation” every month or so. The report predicts that by mid-century, minor high-tide flooding events in coastal areas could happen over ten times per year, while more destructive events (which currently have a four percent chance to occur in any given year) could occur twice a decade.



In order to cope with such events, storm and wastewater systems will need to be upgraded, and many homes and important infrastructure located close to the sea might have to relocate. Moreover, saltwater could infiltrate coastal aquifers, affecting water quality and poisoning farmlands, and septic systems may not be able to safely handle waste. Ports could face severe damage, disrupting supply chains and causing rises in costs that could affect even people who live far away from the coastlines.



“We need to make people understand this isn’t just a bunch of scientists talking and arm-waving. This is really happening, and it’s happening on time scales that matter to the individual,” said Reide Corbett, Dean of Integrated Coastal Programs at <a href="https://www.ecu.edu/">East Carolina University</a> and executive director at <a href="https://www.coastalstudiesinstitute.org/">Coastal Studies Institute</a>. “If we’re talking about 2050 - for someone buying a house today, that’s within the range of their mortgage.”



Regardless of the rather pessimistic tone of the report and the certainty that whatever we do at this moment, the predicted rises over the next three decades cannot be stopped, we should still take urgent measures to mitigate climate change, in order to save our planet from even more catastrophic future outcomes.



“The fact that there’s this locked-in sea level rise is not a reason to throw up our hands and say there’s nothing we can do about this, because there absolutely is,” said Kristina Dahl, a principal climate scientist at the nonprofit organization the<a href="https://www.ucsusa.org/"> Union of Concerned Scientists</a>. “This decade we’re in right now is one of the most consequential decades for our climate future. It’s really critical that we start bringing our emissions down quickly and steeply.”



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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

Sea levels on the U.S. coastline will rise one foot by mid-century

At the current rate of global warming, sea levels along...

Robber flies (Asilidae) are predatory insects that feed by hunting down flying <a href="https://www.earth.com/news/fear-of-predators-can-damage-prey-as-much-as-predation-itself/">prey</a> and snatching them out of the air. In open environments, the flies maintain the line of sight to the potential prey, adjusting their position as the target twists and turns on its path. Such maneuvers are done with great speed and agility. 



However, things become much more complex for these hunters when the environment is cluttered with obstacles. So how do they adjust their hunting patterns when there are distractions in the environment?



Researchers from Imperial College London set out to investigate how the predatory robber flies adjust their interception strategy to deal with obstacles in the environment.&nbsp;



“We used&nbsp;Holcocephala fusca&nbsp;because of its predictable interception path," said study co-author Samuel Fabian, who teamed up with Mary Sumner from the University of Minnesota for four weeks to film robber flies in 3D while they hunted a tiny bead that was pulled along a transparent fishing line. This species of robber fly is commonly known as a gnat ogre due to its prodigious hunting skill.



“Field experiments are a joy, because you get the most naturalistic behavior from free animals," said Fabian. Even though the flies were chasing a small, artificial bead on an invisible line, they were still very keen to intercept it. “If something is small enough, they generally seem to assume it’s food, the flies really didn’t know it’s not real prey, even when very close."



When he and Sumner analyzed the approach strategy of insects intercepting the bead, they found that the flies maintained the same line of sight to the target throughout their approach, in order to capture it successfully. However, when the researchers introduced a wide (5&nbsp;cm) or narrow (2.5&nbsp;cm) bar of black acrylic into the insects’ interception path, they took evasive action.



When the black bar blocked the interception path for more than 1 s, the insects often aborted the chase entirely. If their view was blocked for less than 1 s, they swerved away dramatically until they had passed the obstacle, then moved back to their interception course. Interestingly, when the flies could see the black bar but it did not obscure their view, they still veered away from it as they approached the bead, even though the bead remained in sight all the time.



The researchers wondered what strategy the robber flies were using to make these decisions as they approached the bead. The experts compared the insects’ flight paths and the paths they would have taken if there was no obstacle, and realized that the flies were using a very simple obstacle avoidance strategy;&nbsp;



“The faster the obstacle is getting larger in their field of view the more they turn away from it,” explained Fabian. However, after the fly has passed the obstacle and it begins to grow smaller, the fly is then drawn back toward the bead, resulting in the veering flight paths that Fabian and Sumner recorded, even when the fly’s view wasn’t obstructed.



The researchers concluded that the flies, whose brains are no larger than a grain of sand, are combining two different strategies when hunting prey in a cluttered environment. They use a conventional approach of flying in a direct line to the target when their view is unobstructed, but apply avoidance tactics when an obstacle is present in their view. This results in a simple, hybrid approach that allows them to intercept their prey while avoiding distractions and obstacles in their paths.&nbsp;



“They are paying attention to their surroundings even when focused on the target," concluded Fabian. He hopes to inspire robotic designs that use simpler and more computationally lightweight solutions for complex navigation problems in future.



The study is published today in the&nbsp;<a href="https://journals.biologists.com/jeb">Journal of Experimental Biology</a>.



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

Robber flies avoid obstacles while they hunt moving prey

Robber flies (Asilidae) are predatory insects that feed by hunting...

An international team of researchers from Germany, the United States, and the United Kingdom has performed a series of experiments to investigate the role of flexibility and inhibition in problem solving and how they relate to each other in the great-tailed grackle - a behaviorally flexible urban bird <a href="https://www.earth.com/news/species-suffer-a-second-extinction-when-society-forgets-about-them/">species</a>. By assessing the cognitive abilities of these birds using multiple tests, the researchers found that self-control (a form of inhibition) was linked to flexibility, or the ability to change preferences when circumstances change.



The scientists discovered that grackles who were faster to reverse a color preference were also faster to inhibit their behavior in a “go no-go” test, where they needed to touch one shape but not another on a touchscreen computer to get a reward. This behavior suggests that inhibition is involved in learning how to change preferences.



“The grackles are likely inhibiting themselves from choosing the previously rewarded option so they can instead choose the other option, which is now the only option that has food in it,” explained study lead author Corina Logan, a senior researcher at the <a href="https://www.eva.mpg.de/index/">Max Plank Institute for Evolutionary Anthropology</a>.



However, another measure of flexibility – the time it takes to switch to trying to solve a new option on a puzzlebox after previously succeeding on a different option – correlated negatively with the capacity for inhibition in a “go no-go” test: grackles who were faster to switch to a new option were slower in inhibiting their behavior.&nbsp;



The scientists believe that different birds might use different inhibitory strategies, with those less inclined to inhibit being more open to explore a variety of options. This would help them solve the puzzlebox, but would be less useful in situations when they need to stick to one option, such as those assessed through the “go no-go” test.



Strangely, grackles who did better on a different inhibition test previously thought to measure self-control too, the “detour” test (where the birds needed to walk around to the side of a clear plastic tube to get food from the tube’s opening rather than trying to get it immediately through the plastic), did not necessarily perform better at the “go no-go” test. According to the researchers, while the latter measures self-control (the ability to withhold a response towards something present and wait for something that comes later), the former measures a different, simpler trait: motor inhibition, or the ability to stop a movement that is not useful.&nbsp;



“Our results show that different tests, which are widely referred to as tests of self-control actually assess different cognitive abilities,” says co-author Claudia Wascher, an associate professor of Behavioral Ecology at <a href="https://aru.ac.uk/">Anglia Ruskin University</a>.



Further research is needed to assess to what degree can grackles use causal cognition in order to change their behavior in relation to changing circumstances. Better understanding how flexible species react to a changing environment can help inform conservation management plans and facilitate learning how to promote flexibility in animal species that are struggling to adapt to our rapidly changing world.



The study is published in the journal <a href="https://www.animalbehaviorandcognition.org/article.php?id=1301">Animal Behavior and Cognition</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

Great-tailed grackles adapt quickly to changing circumstances

An international team of researchers from Germany, the United States,...

The Snow Moon is the second <a href="https://www.earth.com/news/longest-full-moon-of-the-year-will-peak-saturday/">full moon</a> of the year. It will light up the nocturnal skies around the world for three days, from Tuesday, February 15 to Thursday, February 17, reaching its peak on Wednesday night. During the same night, Mercury will be located at the greatest distance west of the Sun, making it a bright yet challenging to observe “morning star” in mid-northern latitudes.



According to the <a href="https://www.farmersalmanac.com/">Maine Farmers’ Almanac</a>, the native tribes of what is now the northeastern United States called this the Snow Moon (or the Storm Moon) because it was often accompanied by heavy snowfall. Moreover, since bad weather and snowstorms often made hunting difficult, this moon was also referred to as the Hunger Moon.&nbsp;&nbsp;



In other parts of the world, the February full moon has different names, and is associated with various local religious and secular traditions. In the Purnimanta Hindu tradition, for instance, dating back to the Vedic era (1500 to 500 BCE), which ends each month on the full moon day, this full moon (“Purnima” in Hindi) is called Magha Purnima, since it occurs on the last day of the month of Magha, which is associated with austerity, performing acts of charity, and bathing in a sacred river.



For Buddhists, this moon corresponds with Māgha Pūjā, the second-most important festival of the year, celebrating the historical gathering of the Buddha with 1,250 of his first disciples. It is celebrated on the full moon day of the third lunar month in Cambodia, Laos, Thailand, and Sri Lanka. On this day, Buddhists celebrate the creation of an ideal and exemplary community through large, crowded celebrations, such as the Gangaramaya Navam, a procession of over 5,000 people and many elephants in Sri Lanka.



Although the Snow Moon will peak on Wednesday night, it will be almost as bright on Tuesday and Thursday too, offering additional chances to enjoy it.&nbsp;



“Seeing the Moon yourself shouldn’t be too difficult, as long as clouds aren’t in the way,” said Dr. Greg Brown, an astronomer at the <a href="https://www.rmg.co.uk/royal-observatory">Royal Observatory Greenwich</a>.&nbsp; “It will be easily the brightest object in the night sky and fully visible to the unaided eye; however, a pair of binoculars or a small telescope will enable you to see some of the smaller features on its surface.”



Although this year’s Snow Moon will not be as bright as the 2020 one - which was considered to be a “supermoon” that appeared significantly larger and brighter than normal due to the fact that its peak almost coincided with its perigee (the point in the orbit of the moon at which it is nearest to the Earth) - it will nevertheless offer viewers all around the world a dazzling visual spectacle.&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

The Snow Moon will peak all over the world on Wednesday

The Snow Moon is the second full moon of the...

New research shows that people can’t tell the difference between images of real people’s faces and those generated by <a href="https://www.earth.com/news/artificial-intelligence-will-be-a-game-changer-in-weather-forecasting/">artificial intelligence</a> (AI) programs. In fact, the study shows, people are more likely to trust the synthetic, AI-generated face than the real one. The researchers are calling for safeguards to prevent “deep fakes."



Already such AI-generated images, audio and video have been used to create propaganda, fraud, “revenge porn” and even comedic pieces.&nbsp;



Dr. Sophie Nightingale from <a href="https://www.lancaster.ac.uk/">Lancaster University</a> and Professor Hany Farid from the University of California, Berkeley asked people to try and distinguish between AI-generated faces and images of real people.



In the first experiment, 315 people evaluated a subset of 125 images from a group of 800. The accuracy rate of identifying synthetic or real was 48 percent. In a second experiment, when 219 different participants were trained to identify synthetic faces, the accuracy rate rose to a mere 59 percent.&nbsp;&nbsp;



“Our evaluation of the photo realism of AI-synthesized faces indicates that synthesis engines have passed through the uncanny valley and are capable of creating faces that are indistinguishable - and more trustworthy - than real faces," said the researchers.



Next, the scientists decided to have people evaluate how trustworthy they found the faces to see if there was a difference between synthetic and real. More than 200 participants evaluated trustworthiness in 128 facial images on a scale from 1(very untrustworthy) to 7 (very trustworthy). On average, the synthetic faces were rated as 7.7 percent more trustworthy than the real ones.&nbsp;



“Perhaps most pernicious is the consequence that in a digital world in which any image or video can be faked, the authenticity of any inconvenient or unwelcome recording can be called into question," said the researchers.



“Safeguards could include, for example, incorporating robust watermarks into the image- and video-synthesis networks that would provide a downstream mechanism for reliable identification."



"Because it is the democratization of access to this powerful technology that poses the most significant threat, we also encourage reconsideration of the often-laissez-faire approach to the public and unrestricted releasing of code for anyone to incorporate into any application.



“At this pivotal moment, and as other scientific and engineering fields have done, we encourage the graphics and vision community to develop guidelines for the creation and distribution of synthetic-media technologies that incorporate ethical guidelines for researchers, publishers, and media distributors.”



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



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

People trust synthetic faces over real ones

New research shows that people can’t tell the difference between...

A new study led by the <a href="https://www.adelaide.edu.au/">University of Adelaide</a> has found the first tangible evidence that the ancestors of two of Australia’s most venomous snakes – a tiger and a brown “elapid” (front-fanged snakes) - arrived by sea rather than by land, which is the most common dispersal route of other Australian <a href="https://www.earth.com/news/climate-change-accelerates-aging-in-fish-amphibians-and-reptiles/">reptiles</a>.



“While we know all marine and semi-marine sea snakes descended from a common Australian land-based ancestor, the origin of Australian elapids has been debated for some time,” said study corresponding author David Adelson, a biologist at the University of Adelaide. “Some believe their ancestors travelled by land, whereas others hold the more contentious view that a marine or semi-marine ancestor swam here.”



By analyzing the genomes of these two elapid species and comparing them to those of marine and semi-marine elapid sea snakes and Asian elapids, Professor Adelson and his colleagues discovered that the ancestor of all Australian elapids seems to have accumulated self-replicating and self-mobilizing genes (“jumping genes”) which were not present in their land relatives but came from another source.



“In our research we found a number of genes that were present in the ancestor of all Australian elapids but could not be traced to a snake ancestor; instead they could be traced to similar transposable gene sequences found in marine life, including fish, sea squirts, sea urchins, bivalves, and turtles,” explained Adelson.



“This indicates the marine environment transferred the new genetic material into the snakes and offers new support to the argument that the first Australian elapids swam to our shores. They must have previously acquired the new genetic material during an ancestral period when they were adapted to marine life.”



The scientists identified 14 transfer events of genetic material from other marine organisms, with eight genes being present only in the marine and semi-marine sea snake genomes. Thus, the major genetic differences between land and marine/semi-marine snakes appears to be a consequence of migration into a marine environment.



“This is the first time that jumping genes have been used to confirm the evolutionary history of any animal species, and this research definitively proved that the common ancestor of all Australian elapids adapted to a marine environment. It may also have made it easier for the subsequent land to marine transition of sea snakes,” Professor Adelson&nbsp;concluded.



The study is published in the journal <a href="https://www.mdpi.com/2073-4425/13/2/217">Genes</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

Ancestors of Australia’s most poisonous snakes arrived by sea

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

Fusarium is an important and dangerous fungal <a href="https://www.earth.com/news/how-do-plants-develop-resistance-to-potentially-deadly-pathogens/">pathogen</a> for a broad range of crops. A soil borne disease, Fusarium oxysporum f. sp. cubense (FOC), infects the roots of banana plants. From the roots, the disease spreads into the plant’s vascular system, causing gradual deterioration and death. What makes the disease especially tenacious is that spores linger for up to twenty years after the infected plant is removed.



The banana industry has been severely impacted by FOC, particularly the Cavendish group. The impact of the disease has spread across the world for over 100 years and is predicted to spread further into Asia. Important banana producers such as China, the Philippines, Pakistan and Vietnam are likely to be impacted.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



Predictions are especially dire for Vietnam. Within the next five years, FOC is predicted to cause a loss of 8 percent of the banana production area of Vietnam. This number rises substantially to as much as 71 percent in the next 25 years.&nbsp;



Most bananas are traded locally in Vietnam, as well as in many other banana growing regions throughout Asia, Africa, Latin America and the Caribbean. This means that the consequences of FOC have a direct effect on local economies and nutrition. Because of the high stakes involved, it’s become increasingly important to learn which species are causing Fusarium wilt in Vietnamese bananas.&nbsp;&nbsp;



In an effort to learn more about the Fusarium wilt (and hopefully understand how to control it), an international team from research institutions in Vietnam set out to investigate. The team included experts from the Vietnam National University of Agriculture, Meise Botanic Garden, KU Leuven, and the Naturalis Biodiversity Center.



The scientists used DNA analysis as well as traditional morphological research to identify the fungal species. Interestingly, ¾ of the fungal infections in northern Vietnam were caused by F. tardichlamydosporum. Other species account for only a small percentage of infections. Tragically, infections are also now found in wild bananas as well. This means that wild bananas could possibly act as a reservoir for reinfecting cultivated bananas in the future.&nbsp;



The study is published in the journal <a href="https://mycokeys.pensoft.net/">MycoKeys</a>.



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

Vietnam's banana industry is threatened by disease

Fusarium is an important and dangerous fungal pathogen for a...

A new study from the <a href="https://www.ubc.ca/">University of British Columbia</a> is investigating the cause of the "skunky" <a href="https://www.earth.com/news/plant-odors-repellent-crops/">odor</a> that is emitted by cannabis production facilities. The experts want to understand how cannabis emissions may affect air quality, workers, and the general public.



Davi de Ferreyro Monticelli, a doctoral student in UBC’s Department of Earth, Ocean and Atmospheric Sciences is leading the study. According to Monticelli, knowledge gaps concerning cannabis emissions should be addressed while the industry is still developing.



In a recent interview, Monticelli explained what’s missing in our knowledge about cannabis production emissions, and how their smell compares to other odors.



"One way scientists measure odors is through ‘dynamic olfactometry’ analyses, where people capture a sample of air near a known odorous source and bring it back to the lab so it can be sniffed by trained assessors," said Monticelli.



"The sample is first diluted with clean air and then concentrated further and further until half of the assessment panel can smell it. When this happens, the level of dilution is converted into an odor concentration. This has been performed for many industries and operations, including cannabis facilities, waste and wastewater treatment, and livestock operations."



"We found in the literature that a facility that grows about 1,700 cannabis plants can emit the same odor concentration as a livestock operation with about 30 pigs or about 1,600 chickens. So, although their smells are not the same, one cannabis plant might be equivalent to about one chicken with respect to the intensity of the odors it produces."



Monticelli said that so far, the skunky cannabis smell has been linked to two classes of chemicals that are terpenes and volatile sulphurous compounds, which are volatile organic compounds. "However, we do not really know which type contributes more to the odors, and a better understanding would help the industry and policy makers control odorous emissions more effectively."



The UBC team conducted a review which identified 16 major gaps that need to be addressed, including the monitoring of air quality in and around cannabis facilities. 



"Most of the chemicals that are emitted react quickly in the atmosphere. Some of these can influence the formation of ultrafine particles and ozone at ground level, which are harmful to people and the environment," said Monticelli.



"Because of the fast-changing nature of the chemicals released when cannabis is grown, we need to use real-time sampling instruments that can capture changes in the composition of the air within short periods to properly understand the impact of cannabis facilities on overall air quality."



Monticelli explained that creating and maintaining a database of different cannabis strains and their emissions will improve the accuracy of cannabis cultivation emission inventories over time. "Such inventories provide the basic information needed at the beginning of any air quality assessment."



"This is a relatively new industry which is growing with the rise in cannabis legalization worldwide. Effective emission control practices and environmental policies are needed before new industrial practices become entrenched, and addressing the gaps identified in our review is a first step."



The study is published in the journal <a href="https://pubs.acs.org/journal/esthag">Environmental Science &amp; Technology</a>.



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

How do "skunky" cannabis emissions affect air quality?

A new study from the University of British Columbia is...

Research from the <a href="https://www.ox.ac.uk/">University of Oxford</a> has highlighted the phenomenon of societal <a href="https://www.earth.com/news/lowland-tapirs-in-the-atlantic-forest-are-at-risk-of-extinction/">extinction</a> and its potential impact on efforts to conserve biodiversity. When species disappear from society’s collective memory, they cease to be important or to receive attention from the public. Species can disappear from our societies, cultures and discourses at the same time as, or even before, they become biologically extinct. 



According to a quote attributed to both Banksy and Irvin Yalom, “Species go extinct twice – one time when the last individual stops breathing, and a second time when the collective memory about the species disappears.”



The international and interdisciplinary group of scientists found that whether a species will become societally extinct depends on many factors. These can include its charisma, its symbolic or cultural value, whether and how long ago it went extinct, and how distant and isolated its range is from humans.&nbsp;



For example, not many people have heard of the splendid poison frog (Oophaga speciosa) that was declared extinct from its home range in Panama in 2020. Although there is a remote chance that some specimens may be in captive collections, there are none in zoos or in recognized breeding programs. And because this is not a charismatic or culturally important species, it is unlikely that public funds or interest will be generated to attempt breeding and reintroduction projects. Society does not recognize this species as important.



By contrast, when Spix’s macaw (Cyanopsitta spixii), a parrot endemic to Brazil’s Amazon forest, was declared extinct in the wild in 2019, captive breeding programs were well underway. “Blu”, a Spix’s macaw who achieved worldwide fame as a character in the 2011 animated movie Rio, helped to bring an understanding of this species’ plight to the world. As a result of greater public awareness and empathy, the Brazilian federal government’s Institute for the Conservation of Biodiversity, together with several partner organizations, established an Action Plan to increase the captive population of the Spix's macaw and begin reintroducing them to the wild.&nbsp;



The fact that children from local communities in the former range of Spix’s macaws incorrectly believed that the species is found in Rio de Janeiro, because of its appearance in the animated movie&nbsp;Rio, is an example of how societal extinction works. As time passes, the knowledge and appreciation of a species is transformed and becomes inaccurate and dislocated from reality.&nbsp;



As more and more species go extinct, they also become isolated from people. This leads to the extinction of experience – the progressive loss of our daily interactions with nature. As time passes such species may fully fade from people’s memories and, as a result, suffer societal extinction as well.



One example presented by the researchers is the replacement of traditional herbal medicine by modern medicine in Europe. This is believed to have degraded general knowledge of many medicinal plants, causing them to become societally extinct. Another example arises from studies conducted among communities in southwestern China and Indigenous people in Bolivia, where people have shown loss of local knowledge and memory of bird species that have become extinct.



Thus, public attention and interest in the fate of endangered species is a crucial prerequisite for effective conservation programs. Societies tend to conserve species they recognize as important. But these factors can only have an impact if people were aware of the species in the first place.&nbsp;



“It is important to note that the majority of species actually cannot become societally extinct, simply because they never had a societal presence to begin with,” said Dr Ivan Jarić, lead author of the study and researcher at the Biology Centre of the Czech Academy of Sciences.



“This is common in uncharismatic, small, cryptic, or inaccessible species, especially among invertebrates, plants, fungi and microorganisms – many of which are not yet formally described by scientists or known by humankind. Their declines and extinctions remain silent and unseen by the people and societies."



“Societal extinctions can affect conservation efforts aimed at protecting biodiversity because they can diminish our expectations of the environment and our perceptions of its natural state, such as what is the standard or relatively healthy," said study co-author Dr. Josh Firth.



“Societal extinction can reduce our will to pursue ambitious conservation goals. For example, it could reduce public support for rewilding efforts, especially if such species are no longer present in our memory as natural parts of the ecosystem,” added Dr Jarić.&nbsp;



Further research will now assess how societal extinctions can produce false perceptions of the severity of threats to biodiversity and true extinction rates, and diminish public support for conservation and restoration efforts, such as reintroductions of Eurasian beaver to the UK.



The results of the study are published today in the journal <a href="https://www.cell.com/trends/ecology-evolution/home">Trends in Ecology &amp; Evolution</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

Species suffer a second extinction when society forgets about them

Research from the University of Oxford has highlighted the phenomenon...

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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

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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

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

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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



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Remote sensing will revolutionize the way we monitor trees

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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



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2022 illustrated the consequences of a warming climate

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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



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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

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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...