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From the tiniest fluctuations after the Big Bang, gravity has orchestrated the formation of galaxies, stars, and planets, creating the vast cosmic web we see today.



Gravity isn't just what keeps us grounded -- it's been shaping the universe since its earliest days. Recent studies have provided the most precise tests of gravity on the grandest scales imaginable. 



By examining how cosmic structures have grown over the past 11 billion years, scientists have confirmed that gravity behaves just as <a href="https://www.earth.com/news/cosmic-glitch-in-gravity-expands-the-theory-of-general-relativity/" target="_blank" rel="noreferrer noopener">Einstein's theory</a> of general relativity predicts, even across billions of light-years.



<h2 class="wp-block-heading" id="h-desi-tracks-gravity-over-11-billion-years">DESI tracks gravity over 11 billion years</h2>



Pauline Zarrouk, a cosmologist at the French National Center for Scientific Research (<a href="https://www.cnrs.fr/en" target="_blank" rel="noreferrer noopener">CNRS</a>) working at the Laboratory of Nuclear and High-Energy Physics (LPNHE), has been exploring this cosmic evolution.



In collaboration with the international team behind the Dark Energy Spectroscopic Instrument (<a href="https://www.desi.lbl.gov/" target="_blank" rel="noreferrer noopener">DESI</a>), Zarrouk and her colleagues have traced how cosmic structures grew over the past 11 billion years.



Using data from DESI, the researchers provided the most precise test to date of gravity on the largest scales. 



"General relativity has been very well tested at the scale of solar systems, but we also needed to test that our assumption works at much larger scales," Zarrouk explained. 



"Studying the rate at which galaxies formed lets us directly test our theories and, so far, we're lining up with what <a href="https://www.earth.com/news/radical-new-theory-finally-unites-gravity-spacetime-and-the-quantum-realm/" target="_blank" rel="noreferrer noopener">general relativity</a> predicts at cosmological scales."



<h2 class="wp-block-heading" id="h-einstein-is-smiling-from-the-grave">Einstein is smiling from the grave</h2>



Their findings confirm that gravity behaves as Einstein's theory of general relativity predicts, even across the immense distances of the universe. 



This validation supports our leading model of the cosmos and narrows down alternative theories of gravity that have been proposed to explain puzzling observations, like the <a href="https://www.earth.com/news/universe-expansion-rate-dark-energy-measured-11-billion-years-ago/" target="_blank" rel="noreferrer noopener">accelerating expansion</a> of the universe often attributed to dark energy.



The study also sheds light on <a href="https://www.earth.com/news/quantum-gravity-search-south-pole-neutrinos-experiment/" target="_blank" rel="noreferrer noopener">neutrinos</a> -- the elusive particles that zip through space almost undetected. 



Previous experiments determined that the combined mass of the three types of neutrinos should be at least 0.059 electron volts (eV/c²). For perspective, an electron has a mass of about 511,000 eV/c². 



DESI's results suggest that the total mass of neutrinos should be less than 0.071 eV/c², tightening the constraints on these mysterious particles.



<h2 class="wp-block-heading" id="h-desi-gravity-and-cosmic-structure">DESI, gravity, and cosmic structure</h2>



"Both our BAO results and the full-shape analysis are spectacular," said Dragan Huterer, a professor at the <a href="https://umich.edu/" target="_blank" rel="noreferrer noopener">University of Michigan</a> and co-lead of DESI's group interpreting the cosmological data. 



"This is the first time that DESI has looked at the growth of cosmic structure. We're showing a tremendous new ability to probe modified gravity and improve constraints on models of <a href="https://www.earth.com/news/dark-energy-is-ripping-the-universe-apart-but-we-arent-sure-how/" target="_blank" rel="noreferrer noopener">dark energy</a>. And it's only the tip of the iceberg."



DESI is no ordinary telescope. Mounted on the Nicholas U. Mayall 4-meter Telescope at <a href="https://kpno.noirlab.edu/" target="_blank" rel="noreferrer noopener">Kitt Peak National Observatory</a>, it's capable of capturing light from 5,000 galaxies at once. 



Funded by the DOE Office of Science, the project is now in its fourth year of surveying the sky and aims to collect data from roughly 40 million galaxies and quasars by the time it's done.



<a href="https://www.earth.com/news/theory-gravity-exists-without-mass-so-dark-matter-does-not-exist/" target="_blank" rel="noreferrer noopener">Testing gravity</a> at cosmic scales is crucial. While Einstein's theory has passed every test within our solar system, there's always the possibility that it might behave differently across the vastness of space. 



By confirming that gravity acts as expected over billions of light-years, scientists can be more confident in their models of how the universe has evolved. 



<h2 class="wp-block-heading" id="h-interpreting-the-desi-data">Interpreting the DESI data</h2>



<a href="https://profiles.utdallas.edu/mishak">Dr. Mustapha Ishak-Boushaki</a>, a professor of physics in the <a href="https://nsm.utdallas.edu/">School of Natural Sciences and Mathematics</a> at UT Dallas, co-led the DESI working group that interpreted the cosmological data.



“For this round of DESI results, I focused my efforts at UT Dallas on conducting a large part of the analysis on gravity, which puts constraints on how matter in the universe moves and how large-scale structures, such as clusters of galaxies, evolve,” explained Ishak-Boushaki. 



“The results from DESI, combined with datasets from other experiments, are consistent with general relativity theory operating at cosmic scales, although they do not completely exclude other theories of <a href="https://www.earth.com/news/central-theory-of-quantum-gravity-is-modeled-in-the-laboratory/" target="_blank" rel="noreferrer noopener">modified gravity</a>.”



The new results provide an extended analysis of <a href="https://news.utdallas.edu/science-technology/desi-findings-2024/" target="_blank" rel="noreferrer noopener">DESI’s first year of data</a>, which in April contributed to the largest 3D map of the universe to date and revealed hints that <a href="https://newscenter.lbl.gov/2024/04/04/desi-first-results-make-most-precise-measurement-of-expanding-universe/" target="_blank" rel="noreferrer noopener">dark energy might be evolving</a> over time.



“The latest analysis is also consistent with our previous findings that give preference to the theory that <a href="https://www.earth.com/news/dark-energy-could-explain-the-rapid-expansion-of-the-early-universe/" target="_blank" rel="noreferrer noopener">dark energy</a> is not constant, but dynamic, which is a very important result for cosmic acceleration,” Ishak-Boushaki said.



<h2 class="wp-block-heading" id="h-how-did-this-happen">How did this happen?</h2>



The collaboration is currently analyzing data from the first three years and expects to present updated measurements of <a href="https://www.earth.com/news/new-evidence-suggests-that-dark-energy-comes-from-black-holes/" target="_blank" rel="noreferrer noopener">dark energy</a> and the universe's expansion history by spring 2025. 



The recent results align with earlier hints that dark energy might be evolving over time, adding to the excitement for what's to come.



"Dark matter makes up about a quarter of the universe, and dark energy makes up another 70 percent, and we don't really know what either one is," said Mark Maus, a PhD student at <a href="https://www.lbl.gov/" target="_blank" rel="noreferrer noopener">Berkeley Lab</a> and UC Berkeley who worked on theory and validation modeling pipelines for the new analysis. 



"The idea that we can take pictures of the universe and tackle these big, fundamental questions is mind-blowing."



The study utilized nearly 6 million <a href="https://www.earth.com/news/lonely-quasars-in-the-early-universe-cannot-be-explained/" target="_blank" rel="noreferrer noopener">galaxies and quasars</a>, allowing researchers to peer up to 11 billion years into the past. 



<h2 class="wp-block-heading" id="h-what-s-next-for-desi-and-gravity">What's next for DESI and gravity?</h2>



To sum it all up, with just one year of data, DESI has made the most precise overall measurement of the growth of cosmic structures, surpassing previous efforts that took decades.



The DESI project is remarkable not just for its technological capabilities but also for its collaborative spirit. 



With over 900 researchers from more than 70 institutions worldwide, it's a testament to what can be achieved when the global scientific community comes together.



As we await the next round of results, one can't help but wonder: What other secrets of the universe are waiting to be uncovered? 



The quest to understand gravity, dark matter, and dark energy continues, and each new discovery brings us a little closer to unraveling the mysteries of the cosmos.



The full study was published in <a href="https://data.desi.lbl.gov/doc/papers/">several scientific journals</a>.



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New 'mind-blowing' gravity discovery proves Einstein right again

From the tiniest fluctuations after the Big Bang, gravity has orchestrated the formation of galaxies, stars, and planets, creating the vast cosmic web we see today. Gravity isn't just what keeps us grounded -- it's been shaping the universe since its earliest days. Recent studies have provided the most precise tests of gravity on the grandest scales imaginable. By examining how cosmic structures have grown over the past 11 billion years, scientists have confirmed that gravity behaves just as Einstein's theory of general relativity predicts, even across...

We are among the only primates on the planet that can actually tread <a href="https://www.earth.com/news/new-technology-needed-to-monitor-earths-water-cycle/">water</a>. Swimming is a full body activity that exercises all of our major muscle groups - including the brain, according to a new study.

The research, conducted by scientists at the <a href="https://www.udel.edu/">University of Delaware</a>, looked at students from the ages of 6 to 12. The experts set out to investigate the connection between exercise and the retention of vocabulary words. 

The students were taught new vocabulary words and were then separated into three groups; one for swimming (an aerobic activity), one to take part in a Crossfit-like routine (an anaerobic activity), and the other to participate in a coloring sheet (a control group). 

Lead researcher Maddy Pruit explained that motor movement helps the brain encode new words. While this benefit has been noted in adults, the current study is the first of its kind to examine the effect of exercise on learning ability among children.

As it turns out, the swimmers retained 13 percent more of their vocabulary words compared to their peers in the other two groups. Pruitt attributes this to the automatic, full-body nature of swimming. The other exercise group had to learn the movements of their routine, yet swimming comes much more naturally to us. 

"We were so excited about this study because it applies to clinicians, caregivers and educators who can put it into practice. It’s simple stuff, nothing out of the ordinary. But it could really help boost the outcomes," said study co-author Giovanni Morini.

Pruitt herself has taken these lessons to heart. Having earned her masters degree in 2020, she now works as a speech pathologist for elementary students. 2020. 

“My sessions are very rarely at a table,” she said. “I’ll take my kids out to the playground or we’ll take a walk around the school.” 

The study is published in the <a href="https://pubs.asha.org/journal/jslhr">Journal of Speech Language and Hearing Research</a>.

---

By <a href="http://rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Swimming exercises the brain

We are among the only primates on the planet that...

More than 350 cities in the United States are considered “legacy <a href="https://www.earth.com/news/cities-have-their-own-unique-collection-of-bacteria-and-viruses/">cities</a>” - industrial hubs whose heyday has long since passed, changing demographics and economic circumstances leaving much of the infrastructure to decay. Rather than let these buildings crumble on their own, many communities are instead choosing to make these communal green spaces to benefit the city at large. 

The race to make these abandoned urban spaces “green” are seen by many as a way to reintroduce biodiversity to areas that have been ecologically impoverished for too long. Now, new research shows just how these green spaces can help one of our most important pollinators - bees.

The research, conducted by conservation biologists at the <a href="https://www.osu.edu/">Ohio State University</a>, looked at small plots of vacant land in Cleveland, Ohio over a period of three years. The plots varied in type, ranging from vacant lots to lightly maintained lawns to small flowering prairies. 

Unsurprisingly, the scientists found that more contiguous green spaces were home to the most productive bee colonies. They also found that areas with more native plants had a greater variety of bee and wasp species, making a bigger contribution to urban biodiversity compared to spaces that were heavily managed. 

“This work has shown that some proportion of the bees and wasp community will respond to larger patches of green space being reinstituted in the landscape, even if they are not the natural habitat that was there pre-development. And I think that’s really exciting," said study co-author Dr. Mary M. Gardiner.

Bees are not just important for ecological reasons - they also provide direct economic benefits to human citydwellers. Cleveland alone has over 200 community farms and gardens.

“Both urban and rural farms require pollinators for efficient crop productivity because bee visitations can enhance crop quality and quantity," explained study lead author Katherine J. Turo.

Hopefully, greening initiatives will offer refuge for bees and wasps in the midst of habitat loss and climate change. These are, in Turo’s words, huge issues that aren’t going away anytime soon. 

The study is published in the journal <a href="https://conbio.org/publications/conservation-biology/">Conservation Biology</a>.

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By <a href="http://rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Green spaces provide a refuge for urban pollinators

More than 350 cities in the United States are considered...

If you’re like me, you have fond memories of waking up in the early hours to watch meteor showers as a child. In our increasingly digital world, there’s something special about sitting out in the wee hours when everyone is asleep and watching a silently beautiful natural phenomena. The Perseid meteor shower, one of the classic stargazing events of the Northern Hemisphere, is coming up.

The meteor shower is actually caused by the Earth passing through the debris left in the wake of the Swift-Tuttle Comet. As the particles fall into the Earth’s gravitational field and plummet toward our planet, the friction from our atmosphere causes them to burn up, creating quite a show. 

As many as 60 to 100 “shooting stars” per hour will be visible to naked eye over Britain and other parts of the Northern Hemisphere, although some will be observable a bit south of the equator. The meteor shower is set to peak in the early morning hours of August 11 through the 13. During these days, there will be no moon to obscure the meteors. 

The best way to see the showers is to find a sky as wide as possible, obscured by few buildings, trees or objects. The showers are best seen between midnight and dawn, this is when the part of Earth you’re on is facing into the meteor shower. However, if you want to take your chances looking for an “Earth grazer” meteor - a long, slow meteor shooting horizontally across the sky - try before midnight. 

Find a dark place to watch the shower too - the darker the sky, the more meteors are visible; it doesn’t help to watch a sky so full of light pollution that no meteors can be seen. If you miss the peak days, remember that showers such as the Perseids can last for weeks, you can see some from late July to days after the 13.

Wherever you are, it’s always nice to pull out a lawn chair and sit with a hot thermos of coffee, tea or cocoa and watch the showers with someone special. The Perseids only come around once a year.       

---

By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

The Perseid meteor shower peaks tomorrow

If you’re like me, you have fond memories of waking...

The effects of the climate crisis have become more widespread and severe much sooner than expected, and <a href="https://www.earth.com/news/what-cats-can-teach-us-about-human-genetic-diseases/">human</a> activities are "unequivocally" to blame, according to the latest report from the <a href="https://www.ipcc.ch/">IPCC</a>. The assessment represents the most comprehensive study to date from the UN climate panel.

The research suggests that recent warming is not only unprecedented over the past two thousand years - but possibly over the past hundred thousand years. 

The researchers say that weather extremes which were once considered rare, or even unprecedented, have become common. Furthermore, we are now permanently locked into major impacts of the climate crisis, regardless of whether future global warming is limited to 1.5 degrees Celsius.

The heat wave that killed hundreds of people and more than a billion animals this summer in British Columbia and the Pacific Northwest would have been "virtually impossible" without the impacts of human-caused climate change, according to a recent study from the <a href="https://www.worldweatherattribution.org/">World Weather Attribution</a>. The scientists said that the climate crisis has increased the likelihood of an extreme heat wave in this particular region by more than 150 times.

The IPCC report points out that severe heat waves which used to happen only once every 50 years are now happening about once a decade, as a direct result of global warming. 

The research is based on more than 14,000 scientific studies. The analysis has produced a despairing picture of the future that humans are creating for our planet. 

Severe droughts are happening 1.7 times as often, fire seasons are getting longer and more intense, and tropical storms are getting stronger. Furthermore, rainfall and snowfall extremes are becoming less predictable.

"There is no uncertainty language in this sentence, because there is no uncertainty that global warming is caused by human activity and the burning of fossil fuels," said co-author Friederike Otto, a climatologist at the University of Oxford.

On the bright side, we still have an opportunity to prevent many of the worst impacts of climate change. For example, by drastically reducing greenhouse gas emissions, we could keep global warming below 1.5°C. This would limit sea level rise to just a couple feet over the next century. 

On the other hand, the IPCC report shows that exceeding the 1.5°C global warming target could ultimately lead to 20 feet or more of global sea level rise.

The researchers say that unless immediate, rapid and large-scale action is taken to reduce emissions, the average global temperature is likely to reach or cross the 1.5-degree Celsius warming threshold within 20 years.

“We are now committed to some aspects of climate change, some of which are irreversible for hundreds to thousands of years,” said IPCC co-author Tamsin Edwards of King’s College London. “But the more we limit warming, the more we can avoid or slow down those changes.”

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Humans are "unequivocally" to blame for the climate crisis

The effects of the climate crisis have become more widespread...

The resilience of salt marshes can be compromised by an overabundance of <a href="https://www.earth.com/news/strong-ocean-currents-push-red-crabs-far-out-of-their-range/">crabs</a>. A long-term study by researchers at <a href="https://www.ucsc.edu/">UC Santa Cruz</a> in California's Elkhorn Slough revealed that an excessive number of crabs causes tidal creek banks to become more vulnerable to erosion.

The experts report that coastal salt marshes are threatened by erosion that is associated with rising seas, pounding waves, and tidal flows. These vulnerabilities are made worse by superabundant crabs, which are found at their highest densities along the estuary’s tidal creeks.

The striped shore crab can be found all along the West Coast of North America. The study highlights the dual role of these crabs as both consumers of salt marsh vegetation and as ecosystem engineers.

“Their burrowing weakens the creekbank edges, so that whole chunks of marsh will sometimes calve off, and by lowering biomass they are reducing the ability of marsh plants to prevent erosion,” said study lead author Kathryn Beheshti.

The researchers analyzed the effects of crabs on the vegetation and sediments along eroding creekbank edges over the course of five years. They found that reducing crab abundance led to increased growth of salt marsh vegetation and enhanced sediment density.

“Field experiments that span multiple seasons and years are rare,” said study co-author Kerstin Wasson. “This work demonstrates the value of long-term studies by showing that burrows, which weaken the stability of tidal creek banks, persist despite the near absence of the crabs that build them.”

According to study co-author Professor Brent Hughes, the crabs were most abundant in spring and summer, when the pickleweed marshes are at peak production. “This synchrony suggests that the effect of crabs as consumers is more punctuated than their more chronic effect as engineers."

Elkhorn Slough is one of the largest estuaries in California. It has been substantially altered by human activities, and erosion is steadily eating away at the marsh. “It’s a big issue, because when the marsh erodes away along the tidal creeks it’s a permanent loss,” explained Beheshti.

Study co-author Professor Christine Angelini of the University of Florida said that salt marshes in the southeastern United States appear to be a harbinger of what’s to come for marshes along the Pacific coast, with sea-level rise amplifying the effects of what would otherwise be considered an innocuous crab.

The researchers are calling for similar long-term studies to be conducted in other West Coast marsh systems to investigate whether the impacts of crabs are widespread. “It’d be great for contextualizing our findings,” said Beheshti. 

“We’d like to know if Elkhorn Slough is the canary in the coal mine, signaling yet another pathway for accelerated marsh edge loss for one of California's rarest coastal habitats.”

The study is published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/journal/21508925">Ecosphere</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Superabundant crabs threaten the resilience of salt marshes

The resilience of salt marshes can be compromised by an...

A new carnivorous <a href="https://www.earth.com/news/corn-plants-use-jumping-genes-to-adapt-to-their-environment/">plant</a> has been discovered in western North America. A team of botanists at the <a href="https://www.wisc.edu/">University of Wisconsin-Madison</a> and the University of British Columbia report that Triantha occidentalis can be found in wetlands from Alaska to California, and inland to Montana.

“What’s particularly unique about this carnivorous plant is that it traps insects near its insect-pollinated flowers,” said study lead author Qianshi Lin. “On the surface, this seems like a conflict between carnivory and pollination because you don’t want to kill the insects that are helping you reproduce.”

In the summertime, Triantha produces tall flowering stems covered with sticky hairs that trap small insects. The researchers determined that these insects provide the plants with more than half of the nitrogen they need. This makes an important contribution to their nutritional needs, as they live in a nutrient-poor habitat.

According to the study authors, Triantha represents the 12th known independent evolution of carnivory in the plant kingdom, and the first time the trait has been discovered in the Alismatales order, a group of largely aquatic flowering plants. The experts report that Triantha appears to be capable of sparing friendly pollinators.

“We believe that Triantha occidentalis is able to do this because its glandular hairs are not very sticky, and can only entrap midges and other small insects, so that the much larger and stronger bees and butterflies that act as its pollinators are not captured,” said study co-author Professor Tom Givnish.

Some other Triantha species, including Triantha glutinosa in Wisconsin, also have sticky hairs that trap insects. In the future, the researchers plan to study more species to see how widespread carnivory might be among the Triantha genus.

“It seems likely that there are other members of this group that will turn out to be carnivorous,” said Professor Givnish.

The study is published in the journal <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

New carnivorous plant Triantha spares friendly pollinators

A new carnivorous plant has been discovered in western North...

Gut microbes may be a new therapeutic target to promote healthy <a href="https://www.earth.com/news/self-control-in-childhood-linked-to-slower-aging/">aging</a>, according to the results of a new study from <a href="https://www.ucc.ie/">University College Cork</a> (UCC).

The researchers have introduced a novel approach to reverse age-related deterioration in the brain through the gut microbiome.

"The gut microbiota is increasingly recognized as an important regulator of host immunity and brain health," wrote the study authors. 

"The aging process yields dramatic alterations in the microbiota, which is linked to poorer health and frailty in elderly populations. However, there is limited evidence for a mechanistic role of the gut microbiota in brain health and neuroimmunity during aging processes." 

To investigate, the experts conducted fecal microbiota transplantation from either young or old donor mice into aged recipient mice. The young donor-derived microbiota were found to reduced age-associated impairments in cognitive behavior among the aging recipients. 

The research team was led by Professor John F. Cryan, Vice President for Research &amp; Innovation, University College Cork as well as a Principal Investigator at APC Microbiome Ireland.

“Previous research published by the APC and other groups internationally has shown that the  gut microbiome plays a key role in aging and the aging process," said Professor Cryan.

"This new research is a potential game changer, as we have established that the microbiome can be harnessed to reverse age-related brain deterioration. We also see evidence of improved learning ability and cognitive function."

While the research is very exciting, Professor Cryan cautions that much more research is needed to see how these findings could be translated in humans.

The study is particularly relevant today, as the global population ages. Nearly every country in the world is experiencing growth in the number of older individuals in their population.

With this is mind, it is critically important to develop strategies to maintain healthy brain function. The groundbreaking new research opens up a potentially new therapeutic strategy that targets gut microbes to slow down brain aging and associated cognitive problems. 

“This research of Professor Cryan and colleagues further demonstrates the importance of the gut microbiome in many aspects of health, and particularly across across the brain/gut axis where brain functioning can be positively influenced," said APC Director Professor Paul Ross. 

"The study opens up possibilities in the future to modulate gut microbiota as a therapeutic target to influence brain health."

The study is published in the journal <a href="https://www.nature.com/nataging/">Nature Aging</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Gut microbes may be the key to healthy aging

Gut microbes may be a new therapeutic target to promote...

Record-breaking weather events, both hot and <a href="https://www.earth.com/news/warm-river-habitats-are-important-for-cold-water-fish/">cold</a>, may actually share the same underlying mechanism. An international research team has looked into three extreme events from the past winter to identify the forces that are driving such swings in the weather. 

"By studying these record-breaking cold spells, we can see the ’big picture‘ of extreme weather events.” said study co-author Zhe Han, a scientist in the Institute of Atmospheric Physics at the <a href="https://english.cas.cn/">Chinese Academy of Sciences</a>. 

“Though the events can be different, they might share similar underlying mechanisms that are related to the global warming. Along with the warming, the Arctic amplification and intensified ocean thermal anomalies may interact with the atmospheric circulation, such as the polar vortex and sudden stratospheric warming, to cause the occurrence of extreme cold or hot events."

On July 9, 2021, the highest temperature on Earth was recorded at 130 degrees Fahrenheit in Death Valley, California. This record was broken just months after record-low temperatures were recorded across Asia and the United States. 

“The overarching problem to solve is why extreme weather events have more frequently occurred in a warming climate during recent decades and if the Arctic warming amplification plays a leading driving role,” said first author Professor Xiangdong Zhang of the University of Alaska Fairbanks. 

“The extreme events of the 2020-21 winter provide a unique opportunity to examine what physical processes or mechanisms drive these events.”

The study was focused on two record-setting cold air outbreaks in China from late December 2020 to mid-January 2021. During this time, Beijing and Tiajin experienced their lowest temperatures in 54 years.

The researchers also examined the historic cold spell that struck the United States in the Midwest and the South. In Austin, Texas, the temperature dropped its lowest in almost a century at eight degrees Fahrenheit.

The team used both observational data and simulated models to investigate out how sea and atmospheric events may have driven the extreme weather of the 2020-21 winter compared to the last 42 winters.

“Even though global warming and loss of Arctic Sea ice occurs every year, such extreme weather events that we investigate are intermittent - they do not occur every year,” said study co-author James Overland, an oceanographer at the National Oceanic and Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory. 

“This is because they are caused by a combination of new global warming and extreme, but naturally occurring, precursor weather conditions in the jet stream and polar vortex.”

Zhang explained that abrupt temperature increases in an upper layer of the atmosphere, called sudden stratospheric warming, can drastically alter how the polar vortex and jet stream behave and interact. The weather that results can become even more extreme with fluctuations in ocean temperatures and Arctic sea ice.

“The simultaneous occurrence of anomalous ocean thermal conditions in three ocean basins and the interaction of atmospheric dynamics drove hemispheric-scale, systematic changes in the atmospheric circulation, or weather pattern, to an extremely anomalous state.”

The researchers found that all three events were linked to a sudden stratospheric warming event, but the downstream effects were different in each one. 

In the first event in East Asia, cold polar air steered the midlatitude jet stream southward. During the second event, the polar vortex split, deepening a region of low pressure and circulating with cooler Arctic air. In North America, the polar vortex was also split, but in this case the lower atmosphere settled deeper over the south.

“When attributing the factors responsible for an extreme event, we should have a broad point of view to catch the big picture,” said study co-author Professor Timo Vihma from the Finnish Meteorological Institute. “It may consist of complex interactions of several factors acting far from each other in the hemispherical scale.”

Study co-author Annette Rinke, senior scientist at the Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research in Germany, explained that extreme winter weather events are often driven by "remote" factors.

“The study shows that anomalies in ocean temperatures in addition to the large-scale atmospheric circulation can play a key role in extreme weather events,” said Rinke.

The research is published in the journal <a href="https://www.springer.com/journal/376">Advances in Atmospheric Sciences</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

Extreme weather events may share the same mechanism

Record-breaking weather events, both hot and cold, may actually share...

In a new study from the <a href="https://www.unl.edu/">University of Nebraska-Lincoln</a>, experts report that mountain lions moved less and downsized their territory during the <a href="https://www.earth.com/news/covid-19-antibodies-persist-for-at-least-nine-months/">COVID-19</a> pandemic. The research contradicts the idea that carnivores roam wild in the absence of people. 

“We saw a potential silver lining with COVID, which obviously has been generally a negative thing for everyone,” said study lead author Professor John Benson. “We saw an opportunity to get a better sense of how human disturbance and human activities influence animal behavior.”

During 43 days of lockdowns from late March to early May 2020, mountain lions around the Los Angeles area were monitored with GPS trackers. At this time, most of the parks were closed to the public - including those favored by mountain lions. 

The researchers found that the reclusive animals moved around less and occupied smaller territories compared to before the pandemic.

“There was this popular perception that animals were going to start running free, expanding their home ranges, moving greater distances, colonizing cities, coming into areas where they didn’t used to be,” said Professor Benson. “But that goes against theory - the theory that animals should move as efficiently as possible."

“It actually makes sense that when you don’t have to dodge around as many humans, you could use the landscape more efficiently. Without humans, you don’t have to take a circuitous route to get from one place to another.”

The study was focused on 12 mountain lions that had previously been collared with GPS trackers by Jeff Sikich and Seth Riley of the National Park Service. The team found that the mountain lions were generally traveling shorter distances by up to one third compared to their pre-pandemic activity. 

That matters, said Professor Benson, because it helps quantify just how much energy mountain lions in Greater Los Angeles are expanding to avoid people - energy they need to hunt for prey and search for mates. 

“Any additional stressor - like needing to modify your movement patterns, which could come with a cost of finding prey, getting enough to eat, mating, whatever it is - could be the stressor that tilts the balance toward the extinction process,” explained Professor Benson.

One of the mountain lions, surrounded by busy freeways on three sides, was found to occupy what may be the smallest home range ever recorded for an adult male of about eight square miles. This is a fraction of the roughly 150 square miles that most mountain lions call home. 

According to Professor Benson, the case study illustrates a paradox that makes sense in the light of theory: a carnivore, already confined to an artificially small range by human disturbance, choosing to occupy an even smaller range when that disturbance abates.

Avoiding people is necessary and good to some extent, said Benson, given that “bad things usually happen when we get annoyed by mountain lions.” Yet the energy they expend to do so might ironically increase human-wildlife conflict if high energy demands are leading them to seek additional food sources, he noted. 

“This idea of coexistence - that if they stay out of our way, everyone’s happy - maybe it’s not that rosy if it causes them to burn more energy and then potentially makes them more likely to actually attack livestock or pets. This is not something we documented or investigated with our current study, but it would be an interesting hypothesis to test with future research."

“Does it have unintended consequences that we can’t control? I think that may be a good thing to look at and re-evaluate.”

The study is published in the journal <a href="https://besjournals.onlinelibrary.wiley.com/journal/26888319">Ecological Solutions and Evidence</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

Mountain lions downsized their territory during the pandemic

In a new study from the University of Nebraska-Lincoln, experts...

An abrupt increase in extreme precipitation across the northeastern United States is part of a larger trend, according to a new study from <a href="https://home.dartmouth.edu/">Dartmouth College</a>. 

States from West Virginia to Maine have experienced heavier rain and snowfall since 1996. The experts found that this excess precipitation has coincided with warming sea surface temperatures in the North Atlantic. 

Extreme precipitation in the Northeast is typically caused by tropical cyclones, thunderstorms, and extratropical cyclones like Nor’easters.

The new study has linked the last 25 years of extreme precipitation in the Northeast to greenhouse gases from human activity and a warming Atlantic Ocean.

“Our previous work has shown that Northeast extreme precipitation has increased dramatically over the past 25 years, but this study is among the first to demonstrate that this rise is partially due to anthropogenic climate change,” said study lead author Huanping Huang.

In an earlier study, the Dartmouth team found that the Northeast has experienced a 53 percent increase in extreme precipitation since 1996, and that the primary driver of the increase is heavier rainfall from tropical cyclones. 

The researchers linked this weather phenomenon to a warmer atmosphere - which can hold more water - and to a warmer Atlantic Ocean - which drives stronger and more frequent hurricanes. 

“Our results demonstrate that multidecadal variability in Atlantic sea surface temperatures, an important driver of warming in the Atlantic, alongside anthropogenic greenhouse gases and aerosols, also contributed to the increase in Northeast extreme precipitation after 1996,” explained Huang.

The warming of the North Atlantic Ocean since the 1990s is tied to both natural variability and an increase in greenhouse gases. This warming is also tied to a decrease in aerosols, which pollute the air and reflect sunlight, creating a cooling effect. 

“Our analysis illustrates that decreased aerosols and increased greenhouse gases from human activity have contributed to both the rise in Northeast extreme precipitation and North Atlantic sea surface temperatures,” said study co-author Professor Jonathan Winter. 

“Our research team has been exploring this dramatic increase in extreme precipitation for several years now, and this study confirms that humans are in fact, partially responsible for the increase in heavy rain events that we have been experiencing over the past two and a half decades.”

The study is published in the journal <a href="https://www.journals.elsevier.com/weather-and-climate-extremes">Weather and Climate Extremes</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

Extreme precipitation in the Northeast linked to human activity

An abrupt increase in extreme precipitation across the northeastern United...

In a new study from <a href="https://www.swansea.ac.uk/">Swansea University</a>, experts are describing how venom has contributed to the species diversity of insects and <a href="https://www.earth.com/news/depending-on-friends-makes-life-easier-for-reef-fish/">fish</a>. The researchers found that venomous animals diversify twice as fast as non-venomous animals. 

Insects and fish have a larger number of species than any other groups in the animal kingdom. Scientists have identified over one million species of insects, and 31,269 species of fish. 

Overall, 16 percent of all insect families and ten percent of fish families contain venomous species, such as wasps or stingrays. The new study has revealed that venom has evolved independently at least 19 times in fish and at least 28 times in insects throughout their evolutionary history.   

Venom helps animals to repel predators and catch prey. This may allow venomous animals to exploit more opportunities in their environment, potentially leading to the formation of new species as they diversify in their ecology, explained the researchers.

The study is one of the first to examine the role of venom in driving biodiversity. By finding that venom has evolved so many times, and that it is associated with faster diversification, the research indicates that venom has played an important role in promoting species diversity.

"Our results provide evidence that venom has played a part in generating the diversity of insects and fishes, which have the largest number of species amongst invertebrates and vertebrates respectively," said study lead author Dr. Kevin Arbuckle.

"Venom is not the only factor driving species richness in these animal groups, but we show that it has played an important but previously unrecognised role in generating the amazing diversity we see today amongst insects and fishes.”

Among insects, venom evolved fairly evenly over time. In fish, however, most venomous species can be traced back to the Late Cretaceous and Eocene periods.

“Mosasaurs - the aquatic behemoths made famous in the Jurassic World series - originated and peaked in diversity in the Late Cretaceous, at a time when other large marine predator groups were declining," explained Dr. Arbuckle.

"Similarly, whales originated and peaked in diversity in the Eocene, when most other large marine predators had gone extinct at the end-Cretaceous mass extinction, which killed off the dinosaurs."

"Both early whales and mosasaurs are thought to have been active predators with similar styles of movement. As a result, we cautiously speculate that most origins of fish venom were linked to similar predation pressures imposed by mosasaurs in the Late Cretaceous and early whales in the Eocene.”

The study is published in the journal <a href="https://bmcecolevol.biomedcentral.com/">BMC Ecology and Evolution</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

Venomous animals diversify at double the rate

In a new study from Swansea University, experts are describing...

Across generations, humans adapt to a changing <a href="https://www.earth.com/news/cattle-are-becoming-less-adapted-to-their-environment/">environment</a> by passing down knowledge. Corn plants have their own strategy for adaptation, using "jumping genes" to maintain genetic diversity. 

Jumping genes, which are known as transposons, were discovered in the 1940s by Nobel Prize-winning <a href="https://www.cshl.edu/">Cold Spring Harbor Laboratory</a> (CSHL) geneticist Barbara McClintock.

In a new study, CSHL Professor Doreen Ware and colleagues have published genome sequences from 26 different strains of corn.

The researchers analyzed the genetic diversity found in the genomes of these modern corn plants, including transposons and genes that regulate desired crop traits. This genetic diversity was established as corn plants were bred in different climates throughout the world. 

“Humans have brains. Our main adaptive component is our ability to transfer culture and knowledge, right? And that’s how we deal with our environment. A plant’s strategy is to have a fluid genome. They have a very intimate relationship with these transposons, where they use them to bring in new genetic diversity so that they can deal with these events because they can’t run away. They’re not going to go into the house, and they’re not going to move water to them," explained Professor Ware.

The CSHL team mapped the first corn genome in 2009, and has continued the research ever since. Recent technology made it possible for the experts to locate and study both important crop genes and the nearby regions that regulate their use. 

"We had little access to the regulatory architecture of corn before," said Professor Ware. The most recent analysis reveals how the corn genome was shuffled over time. 

“These genomes provide us a footprint of that life history. Different strains have experienced different environments. For example, some came from tropical environments, others experienced particular diseases, and all those selective pressures leave a footprint of that history," said Professor Ware.

More than 366 million metric tons of corn was grown in the United States from 2018 to 2019. With the new detailed maps of the corn genome, scientists are now equipped to develop crops for a rapidly changing climate. 

“The Midwest is not going to have the same temperature profile twenty years from now," said Professor Ware. "The genomes provide broader insights into corn genetics, and this, in turn, can be used to start optimizing corn to grow in future environments."

The study is published in the journal <a href="https://www.sciencemag.org/">Science</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

Corn plants use jumping genes to adapt to their environment

Across generations, humans adapt to a changing environment by passing...

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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

[sendtonews key="iuA5mpp3jv-1641775-12187" type="single"] Today’s Video of the Day from the...

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Today’s Video of the Day from <a href="https://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

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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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



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

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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

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

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Today's Video of the Day from <a href="https://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

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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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

[sendtonews key="0879czfG3k-1785905-12187" 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 the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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

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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

[sendtonews key="0dEcERCq61-2283382-12187" type="single"] Today’s Video of the Day from Stowers...

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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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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

[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...