You probably know at least a little bit about ocean circulation around the world, also known as currents. In fact, you may have felt smaller currents yourself on a day at the beach.



But have you heard bout the "great global ocean conveyor belt," which is a vast network of currents that constantly moves water around the entire planet?



This massive system helps distribute heat around the world, influencing everything from temperatures to rainfall. Unfortunately, it's slowing down and on the verge of total collapse.



Scientists have been studying this phenomenon, and according to recent research published in <a href="https://www.nature.com/articles/s41561-024-01568-1" target="_blank" rel="noreferrer noopener">Nature Geoscience</a>, it's a bigger deal than we thought. 



<h2 class="wp-block-heading" id="h-ocean-circulation-and-the-amoc">Ocean circulation and the AMOC?</h2>



The Atlantic Meridional Overturning Circulation, or AMOC, is like a massive ocean conveyor belt that moves warm and cold water around the <a href="https://www.earth.com/news/why-the-atlantic-ocean-may-ultimately-vanish/" target="_blank" rel="noreferrer noopener">Atlantic Ocean</a>. 



It starts in the Gulf of Mexico, where warm, salty water flows northward along the eastern coast of the United States and across the Atlantic towards Europe. 



As this warm water reaches the North Atlantic, it cools down, becomes denser, and sinks deep into the ocean. 



This sinking process pulls more warm water north to replace it, creating a continuous loop that helps <a href="https://www.earth.com/news/collapse-of-major-ocean-system-would-cause-weather-chaos/" target="_blank" rel="noreferrer noopener">regulate the climate</a> by distributing heat across the planet. 



Thanks to the AMOC, regions like Western Europe enjoy milder winters than they would otherwise.



Humans rely on the AMOC in several important ways. By regulating global temperatures, it helps maintain stable weather patterns, which are crucial for agriculture, ecosystems, and our daily lives. 



Researchers point out that the Atlantic Meridional Overturning Circulation (AMOC) is now weaker than at any other time in the past 1,000 years.



The research team from several leading universities explains that global warming is behind this slowdown. 



Their new modeling suggests that meltwater from the <a href="https://www.earth.com/news/greenlands-melting-icebergs-may-not-be-threat-to-ocean-currents-amoc/" target="_blank" rel="noreferrer noopener">Greenland ice sheet</a> and Canadian glaciers could be the missing piece of the puzzle.



<h2 class="wp-block-heading" id="h-why-should-we-care-about-this">Why should we care about this?</h2>



"Our results show the Atlantic overturning circulation is likely to become a third weaker than it was 70 years ago at 2°C of global warming," says the research team. 



"This would bring big changes to the <a href="https://www.earth.com/news/the-arctic-is-melting-fast-but-a-slowing-ocean-current-could-help/" target="_blank" rel="noreferrer noopener">climate and ecosystems</a>, including faster warming in the southern hemisphere, harsher winters in Europe, and weakening of the northern hemisphere's tropical monsoons."



Think about that for a second. A weaker ocean current could mean colder winters in Europe and shifts in rainfall patterns that affect millions of people. It's not just about the ocean; <a href="https://www.earth.com/news/disastrous-climate-changes-of-the-last-ice-age-could-happen-again/" target="_blank" rel="noreferrer noopener">it's about our daily lives</a>.



<h2 class="wp-block-heading" id="h-meltwater-and-ocean-circulation">Meltwater and ocean circulation</h2>



The Earth has already warmed 1.5ºC since the industrial revolution. And get this: the Arctic has been heating up nearly four times faster than the rest of the planet. 



All that heat is melting Arctic sea ice, glaciers, and the Greenland ice sheet.



"Since 2002, Greenland lost 5,900 billion tons (gigatons) of ice," notes the research team. "To put that into perspective, imagine if the entire state of Texas was covered in ice 26 feet thick."



All this fresh meltwater flowing into the subarctic ocean is lighter than salty seawater, so it doesn't sink as much. 



That messes with the southward flow of deep, cold waters from the Atlantic and <a href="https://www.earth.com/news/climate-change-will-impact-the-gulf-stream-more-than-we-thought/" target="_blank" rel="noreferrer noopener">weakens the Gulf Stream</a> -- the same current that gives Britain its mild winters.



<h2 class="wp-block-heading" id="h-ripple-effects-around-the-globe">Ripple effects around the globe</h2>



So, what's the big deal with the Gulf Stream slowing down? Well, for starters, Europe could face harsher winters. 



<a href="https://www.earth.com/news/climate-paradox-ocean-current-collapse-could-plunge-europe-into-cold/" target="_blank" rel="noreferrer noopener">Places like Britain</a> might start feeling more like their chilly counterparts at the same latitude, such as parts of Canada.



<figure class="wp-block-image aligncenter size-full is-resized"><a href="https://www.earth.com/wp-content/uploads/2024/11/Atlantic-Meridional-Overturning-Circulation_AMOC_collapsing_Nature-Geoscience_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/Atlantic-Meridional-Overturning-Circulation_AMOC_collapsing_Nature-Geoscience_1s.webp" alt="The addition of meltwater in the North Atlantic leads to localised cooling in the subpolar North Atlantic and warming in the South Atlantic. Credit: Nature Geoscience (2024)." class="wp-image-1951410" style="width:300px;height:auto"/></a><figcaption class="wp-element-caption">The addition of meltwater in the North Atlantic leads to localised cooling in the subpolar North Atlantic and warming in the South Atlantic. Credit: Nature Geoscience (2024).</figcaption></figure>



"Our new research shows meltwater from the Greenland ice sheet and Arctic glaciers in Canada is the missing piece in the climate puzzle," the researchers explain. 



When they included this meltwater in their simulations, the slowing of the oceanic circulation made sense.



The study confirms that the Atlantic overturning circulation has been slowing down since the mid-20th century. It also gives us a sneak peek into <a href="https://www.earth.com/news/atlantic-and-arctic-mixing-is-crucial-for-earths-climate-stability/" target="_blank" rel="noreferrer noopener">what's coming next</a>.



<h2 class="wp-block-heading" id="h-northern-and-southern-oceans-connected">Northern and Southern oceans connected</h2>



"Our new research also shows the North and South Atlantic oceans are more connected than previously thought," the team states. 



Changes in one part of the ocean can quickly affect distant regions. When the oceanic circulation is strong, it transfers a lot of heat to the <a href="https://www.earth.com/news/antarctic-warming-triggers-rising-north-atlantic-sea-levels/" target="_blank" rel="noreferrer noopener">North Atlantic</a>. 



But when it weakens, the surface of the ocean south of Greenland doesn't warm up as much, leading to what's called a "warming hole." Meanwhile, the South Atlantic ends up storing more heat and salt.



<h2 class="wp-block-heading" id="h-time-is-not-on-our-side">Time is not on our side</h2>



"Our simulations show changes in the far North Atlantic are felt in the South Atlantic Ocean in less than two decades," the researchers reveal. This means the effects of the slowdown are spreading faster than we thought.



Climate projections have suggested the Atlantic overturning circulation will weaken by about 30% by 2060. But hold on -- that's without considering all that extra meltwater.



"The Greenland ice sheet will continue melting over the coming century, possibly raising global sea level by about 4 inches," the study notes. 



"If this additional meltwater is included in climate projections, the overturning circulation will weaken faster. It could be 30% weaker by 2040. That's 20 years earlier than initially projected."



<h2 class="wp-block-heading" id="h-what-can-we-do">What can we do?</h2>



Such a rapid decrease in the overturning circulation will shake things up. 



Europe might see colder winters, the northern tropics could get drier, and places like the southern United States might experience warmer, wetter summers.



"Our climate has changed dramatically over the past 20 years," the researchers warn. "More rapid melting of the ice sheets will accelerate further disruption of the climate system."



So, what does this all mean for us? It means we have even less time to get our act together. Reducing emissions isn't just a good idea -- it's crucial.



Our planet's systems are interconnected in ways we're only beginning to understand. If we want to keep things from getting worse, we need to act now. Every little bit counts, and the clock is ticking.



The full study was published in the journal <a href="https://www.nature.com/articles/s41561-024-01568-1" target="_blank" rel="noreferrer noopener">Nature Geoscience</a>.



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Collapse of Earth's main ocean water circulation system is already happening

You probably know at least a little bit about ocean circulation around the world, also known as currents. In fact, you may have felt smaller currents yourself on a day at the beach. But have you heard bout the "great global ocean conveyor belt," which is a vast network of currents that constantly moves water around the entire planet? This massive system helps distribute heat around the world, influencing everything from temperatures to rainfall. Unfortunately, it's slowing down and on the verge of total collapse. Scientists have...

A team of researchers from the <a href="https://www.amnh.org/">American Museum of Natural History</a>, the <a href="http://english.cas.cn/">Chinese Academy of Sciences</a>, and the <a href="https://www.ucsb.edu/">University of California, Santa Barbara</a>, have concluded that the brain evolution of anthropoid primates — a diverse family of both modern and extinct monkeys, humans, and their nearest relatives — was much more complex earlier on in history than previously realized. 

By studying a 20-million-year-old Chilean primate skull (the only skull and known specimen of the Chilecebus carrascoensis) the researchers saw that the brain enlarged repeatedly and independently throughout anthropoid history. 

These findings are published in <a href="https://advances.sciencemag.org/">Science Advances</a>.

"Human beings have exceptionally enlarged brains, but we know very little about how far back this key trait started to develop," said lead author Xijun Ni, a research associate at the Museum and a researcher at the Chinese Academy of Sciences. "This is in part because of the scarcity of well-preserved fossil skulls of much more ancient relatives."

"Through more than three decades of partnership and close collaboration with the National Museum of Chile, we have recovered many remarkable new fossils from unexpected places in the rugged volcanic terrain of the Andes," said John Flynn, the Museum's Frick Curator of Fossil Mammals. "Chilecebus is one of those rare and truly spectacular fossils, revealing new insights and surprising conclusions every time new analytical methods are applied to studying it."

[caption id="attachment_1876798" align="aligncenter" width="650"]<a href="https://www.earth.com/wp-content/uploads/2019/08/brain-sizes.jpg"><img class="wp-image-1876798" src="https://www.earth.com/wp-content/uploads/2019/08/brain-sizes.jpg" alt="" width="650" height="672" /></a> Comparing the brain sizes of a variety of primates, Image © Xiaocong Guo/Xijun Ni[/caption]

Flynn, Ni, and their colleagues had previously studied Chilecebus and gathered a rough outline of the species’ encephalization, or the brain size relative to body size. Most primate species have encephalization quotients (EQs) relative to other mammals, however some <a href="http://www.earth.com/news/young-brains-impulsive-behavior/">primates</a> have higher EQs than others, such as humans and their closest kin.

To look deeper into the EQ history of anthropoids, the researchers used Chilecebus to map out patterns across the anthropoid family tree, which resulted in a phylogenetic encephalization quotient (PEQ). Most modern monkeys have PEQs of 0.86 to 3.39, whereas Chilecebus had a PEQ of 0.79. And humans have a PEQ of 13.46.

Using this framework, the researchers were able to confirm that cerebral enlargement happened repeatedly and independently throughout anthropoid evolution, as did occasional cerebral reduction. 

--

By <a href="mailto:oliviagharvey24@gmail.com">Olivia Harvey</a>, <a href="http://earth.com">Earth.com</a> Staff Writer

Main Image © AMNH/N. Wong and M. Ellison

Ancient skull reveals complex brain evolution in apes and monkeys

A team of researchers from the American Museum of Natural...

Experts at the <a href="https://alleninstitute.org/">Allen Institute for Brain Science</a> have categorized brain cell types to produce the most detailed "parts list" of the <a href="http://www.earth.com/news/high-blood-pressure-brain-health/">human brain</a> to date. The research will improve our understanding of the brain, which could transform the way that brain diseases and disorders are treated.

For the first time, an ultra-high-resolution comparison of human and mouse brain cell types has been achieved. The researchers discovered that the majority of our brain cells have a counterpart in the mouse brain. These counterparts have been maintained over approximately 75 million years of evolutionary distance. 

To compare and contrast the human and mouse brains, the researchers studied genes in one region of the human brain a single cell at a time.

"Just as we can use our genes to build our family trees or find long-lost relatives with services like ancestry.com or 23andme, we're letting the genes tell us the story of our brains and their evolution," said study senior author Dr. Ed Lein. "And in the same way that police were able to use information in those genetic databases to track down the Golden State Killer, this new high-resolution view of our brains provides a baseline to find the cells that go wrong in disease."

The brain cell map will help scientists to interpret decades of rodent neuroscience research to be applied to the human brain. For example, some of the findings highlight key differences between mice and people that could explain why so many psychiatric drugs developed in mouse studies do not work in humans.

"The parts list of the human brain is key. That list allows us to understand what's different between mice and human beings and what's similar. The ultimate impact of this understanding will be better treatments for mental illnesses," said Dr.Joshua Gordon. "The eventual goal will be to develop the complete parts list of the entire human brain. It's a hugely ambitious goal, but this paper shows us that it's a doable undertaking."

The researchers found that serotonin receptors are very different between mouse and human brain cells. In mice, these proteins are used by other kinds of neurons, which means that a drug developed to act on a serotonin receptor would not affect a mouse and a person in the same way. This discovery will shed new light on why clinical researchers have struggled to develop effective treatments for depression and other serotonin-related disorders.

The finding that the 75 human brain cell types identified in the study have a counterpart in the mouse brain supports a revelation by the 2003 Human Genome Project that humans and mice have almost the same number of genes.

"Many people would assume that the human brain is more complex than the mouse brain," said Dr. Lein. "It's somewhat of a surprise that at least in terms of cellular diversity, that doesn't seem to be the case. But now that we have a way to make a true apples-to-apples comparison, we start to see many differences in how the genes are used, what the cells look like and the proportions of different cell types in the brain."

The study is published in the journal <a href="https://www.nature.com/content/nature_subs/cpmlp_2a/index.html?productId=nature&amp;coupon=nat50q219&amp;end_date=09/30/2019&amp;gclid=CjwKCAjw1_PqBRBIEiwA71rmtXUpNKb_hANkzMepOeX6LZOS9vHYFggmo857eKSLMLpQRjACkyds3hoCshsQAvD_BwE">Nature</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Shutterstock/MattLphotography

New ‘parts list’ will drastically improve our understanding of the brain

Experts at the Allen Institute for Brain Science have categorized...

Irregular Sonoran monsoon highlights danger of always blaming climate change. The Sonoran Desert in the United States is home to the large cities of Phoenix and Tucson, Arizona. On June 26, 1990, Phoenix had its <a href="https://www.azcentral.com/story/news/local/phoenix-weather/2019/06/26/29th-anniversary-phoenix-heat-record-temperatures-wont-get-close/1575187001/">hottest day on record</a>, a sweltering 122 degrees Fahrenheit. Although California’s Death Valley has reached hotter temperatures, Phoenix is consistently one of the hottest cities in the US with temperatures rising to above 100 degrees daily from May through September. 

There is typically one relief to the physical assault of these extreme temperatures. The Sonoran Desert also has an annual rainy season in the summer. The monsoon rains are where most of the region’s precipitation comes from. Actually, 70% of the annual precipitation in the Sonoran comes during the summer monsoon. 

The monsoon rains have created a desert within the Sonoran like no other in the world and certainly not like any other in North America. The Sonoran Desert covers 120,000 acres of land in Arizona, California and in Mexico – Baja California and Sonora. The desert is the most <a href="https://www.biologicaldiversity.org/programs/public_lands/deserts/sonoran_desert/index.html">biodiverse</a> in North America, with 2,000 native plants, 100 species of reptiles, 60 mammals and 350 bird species. 

At times, walking in the Sonoran it feels more like a forest of saguaro cactus, ocotillo and polo verde rather than a desert at all. The plants and animals in the Sonoran have adapted to dry conditions but also to take advantage of rain bursts, essential for their long term survival. Humans like other animals have long called the Sonoran home and adapted to its beautiful but harsh conditions.        

The Sonoran Desert has been inhabited by humans for at least 12,000 years, the <a href="https://www.desertmuseum.org/books/nhsd_human_ecology.php">Arizona-Sonora Desert Museum</a> reports. The Hohokam of the Sonoran created the largest system of pre-Colombian irrigation canals in North America and created a unique system of agriculture adapted to the Sonoran. Or course, European Americans created a much larger and more intensive irrigation and dam system across the whole of the arid western landscape. 

Cities with human densities like Phoenix and Tucson wouldn’t be possible without intensive water systems. These systems are already on shaky ground from a sustainability standpoint, emptying the Colorado River as it’s about to reach the Sea of Cortez and draining aquifers at a pace that can’t be replenished naturally. Drought only adds another dimension to the predicament. 

This year, the monsoon rains in the Sonoran Desert have been rather unimpressive so far. <a href="https://www.azcentral.com/story/news/local/phoenix-weather/2019/06/01/arizona-monsoon-2019-forecast-calls-slow-start-heat-rain/3710374002/">AZCentral</a> reports that predictions show a slow start to the Sonoran monsoon season with rain between June and August lower than usual. An easy conclusion to come to would be that global climate change is contributing to the drier and later start to the monsoon, but climate and weather are complicated. 

El Niño conditions in the eastern Pacific Ocean may be a factor in the late start to the monsoon, even though any correlation between the two is minimal. The El Niño created lower than normal spring temperatures, which in turn could be delaying the monsoon later in the summer. Hot air over Mexico builds winds that drive the rain bearing clouds north into the Sonoran Desert, causing the monsoons. Weather in the region and further south is hot now though, which may in turn drive a later monsoon in August and September.  

The irony of the hot, dry summer is that it was caused by a wetter, colder winter. Near Tucson, the year began with a New Year's morning light blanket of snow across a prickly landscape of cactus. Across the west, the overall winter was even more impressively snowy and cold. <a href="https://opensnow.com/news/post/2018-2019-western-united-states-snowpack-recap">OpenSnow</a> reports that some high elevation parts of the US had reasonable snowpack into July this summer. 

The snow started dumping relatively early in November and continued through the winter, allowing many ski resorts in the west to stay open later into the year than usual. <a href="https://www.denverpost.com/2019/05/13/colorado-snow-totals-2018-19-winter-season/">The Denver Post</a> called the winter ‘remarkable’ and noted that the snowpack in Colorado was 161% of the 1981-2010 median.  

I <a href="https://www.earth.com/news/donald-trump-climate-weather/">reported earlier</a> about Trump’s mockery of climate change science in the face of cold weather. This is a common tactic for Trump and other climate change deniers, but it also teaches those concerned about climate change a valuable lesson.

Climate change is about gradual average temperature change over time. The <a href="https://features.weather.com/collateral/climate-change-extreme-weather-sidebar/">Weather Channel</a> reports that although there is no real controversy over the fact that carbon emissions are driving a changing climate, specifics are complicated. 

Some extreme weather patterns are almost certainly linked to climate change, for instance the melting of polar ice caps and some glaciers. Other examples of extreme weather are harder to connect directly as caused by global climate change. The increased prevalence of tornados might be due to climate change but it might not be. Droughts and floods happen and which instances are connected to climate change is a bit hard for scientists to say. One thing is certain, blaming all bad weather on climate change is dangerous. 

Trump and others are right to be ridiculed for their arrogance when they proclaim a bad snow day in February invalidates climate change science. For every warm day in the winter and every drought, flood, hurricane or tornado, it’s important to understand, these don’t prove climate change either. The world is complicated and even without a damaged climate, there is variation and the line of causality between a heavy snow in winter and a dry hot day in summer is hard to trace. 

The complicated nature of weather patterns over the Gulf of Mexico and those over the dry canyons, mountains and prairies of the southwestern US are interlinked in ways not easily simplified into brief statements. If we are to keep on the side of scientific understanding, it’s best to embrace the complex nature of our world. Climate change is happening, but to imagine that any one model can capture the whole of it is the same arrogance that blinded us to the interconnectedness between human luxury and climate in the first place.                    

--

By <a href="mailto:zachfitzner@yahoo.com">Zach Fiztner</a>, <a href="http://earth.com">Earth.com</a> Contributing Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Image Credit: Shutterstock/Anton Foltin

Irregular Sonoran monsoon highlights danger of always blaming climate change

Irregular Sonoran monsoon highlights danger of always blaming climate change....

A new method for protecting plants from viral infections. A team of scientists led by <a href="https://www.uni-halle.de/?lang=en">Martin Luther University Halle-Wittenberg</a> (MLU) has developed a new method which may ultimately make it easier to immunize plants for protection against viruses.

Based on plant cell extracts, the researchers created a screening process that can quickly identify and produce substances to combat various pathogens. The technique was modeled after a plant's natural defense system, which is triggered by viral infections and other threats. 

When a <a href="http://www.earth.com/news/plants-water-acid-rain/">plant</a> is attacked by a virus, the cells serve as a host where the virus can reproduce and establish infection by producing viral ribonucleic acid molecules (RNAs). 

Plants detect these molecules and cut them up using special enzyme scissors. As a result, small interfering RNAs (siRNAs) are generated throughout the plant to launch a second line of defense. 

The siRNA molecules attach themselves to Argonaute protein complexes, which play a central role in RNA silencing. Next, the siRNA molecules try to guide the Argonaute proteins to the harmful RNAs in an effort to break them down into harmless compounds. 

"By implementing this two-stage process, the plant is trying to protect itself from the virus both at the site of the infection and throughout its structure," said Professor Sven-Erik Behrens. However, he explained, this process is not very efficient. "When a viral infection occurs, lots of different siRNA molecules are produced, but very few of them have a protective effect. The majority simply saturate the Argonaute complexes, rendering them inactive."

The team established a strategy to identify the few antiviral siRNA molecules that are effective against specific viruses so that their dexterity can be exploited for the development of new plant vaccines. 

The siRNA molecules that make the best candidates for reliable vaccination must have two key properties - the ability to bind strongly to the Argonaute complexes and the capacity to lead these proteins in the right direction. 

"If the pathogen changes or the plant needs to be protected against another virus, the established screening process enables suitable RNA molecules to fight the respective pathogen to be identified very quickly," said Behrens. "This means we can be very flexible when it comes to combating new pests."

The researchers plan to continue improving upon their method, and further studies may help to clarify how vaccines can be produced in larger quantities, as well as how they can be absorbed by plants. 

According to Behrens, the research suggests that there is potential for a spray that can be used in greenhouses."Tomato growers have to contend with whiteflies, for example, and these can transfer viruses from one plant to another very quickly." 

While harsh pesticides have been required to kill off insects in the past, the new system may prove to be a much safer and eco-friendly alternative.

The study is published in the journal <a href="https://academic.oup.com/nar">Nucleic Acids Research</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: MLU / Markus Scholz

A new method for protecting plants from viral infections

A new method for protecting plants from viral infections. A...

Rainwater from 300 million-year-old minerals has helped researchers piece together the surface topography of Western France during the <a href="https://www.earth.com/news/coal-earth-ice/">Late Carboniferous</a> before the dinosaurs. 

A team of researchers from the UK, France, and Germany conducted an isotopic analysis of ancient rainwater stored in granite samples. 

The granite rocks came from Western France, areas that were near the equator and part of the Variscan Belt mountain chain that extended into Spain, Germany, and England.  

As rain fell on this ancient mountain range, fault zones and deep cracks allowed the water to sink below the surface. 

The researchers then determined the chemical composition of the rainwater using spectrometry. 

“Once we realised that the water in the sample was from rainfall, it meant that we could use standard geochemistry techniques to look back into history,” said Dr. Camille Dusséaux, the lead researcher for the study. “This means that the rainfall can tell us about the altitude, the latitude of the mountains where it fell, and hints at why some radioactive minerals are found in the area.” 

The team measured hydrogen isotope ratios in muscovite, a mineral found in granite that has water within its structure. 

“This is not the oldest rainwater ever found, but the oldest where scientists have been able to isotopically reconstruct its composition and history,” said Dusséaux. 

The samples were dated and confirmed to be around 300 million years old, and the chemical composition of the rainwater indicated that the rain fell on a mountain range. 

“This study is a nice example highlighting how traditional isotope geochemistry and careful petrography of minerals formed deep in the Earth can shed light on surface conditions, even before dinosaurs roamed the Earth,” Dr. Catriona Menzies who was not involved in the study commented on the research. 

The study findings were recently presented at the <a href="https://goldschmidt.info/2019/">Goldschmidt Geochemistry Conference</a> in Barcelona.

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette,</a> <a href="https://www.earth.com/">Earth.com</a> Staff Writer 

Image Credit: Camille Dusséaux

300 million-year-old rainwater sheds light on France before the dinosaurs

Rainwater from 300 million-year-old minerals has helped researchers piece together...

Newly identified microbe has the potential to transform oil to gas. An oil seep is a natural leak of crude oil and gas that rises up from fractures in the <a href="http://www.earth.com/news/arctic-ocean-seafloor/">seafloor</a>. When these hydrocarbons leak out onto the sediment surface, they can support highly diverse habitats in the darkest part of the ocean. 

Even deep in the sediment, where no oxygen exists, hydrocarbons provide an important energy source for subsurface microbes, such as archaea.

A new study led by scientists from the <a href="https://www.mpi-bremen.de/en/Home.html">Max Planck Institute for Marine Microbiology</a> has identified a microbe, an archaeon named Methanoliparia, that has the potential to transform long-chain hydrocarbons into methane. 

The microbe uses a process called alkane disproportionation, which splits the oil into methane (CH4) and carbon dioxide (CO2). "This is the first time we get to see a microbe that has the potential to degrade oil to methane all by itself," said study first author Rafael Laso-Pérez.

In the Gulf of Mexico, the scientists collected sediment samples from an oil and gas seep 3,000 meters deep in the ocean called the Chapopote Knoll. Genomic testing revealed that Methanoliparia is equipped with enzymes that are capable of using the oil without having access to oxygen. 

"The new organism, Methanoliparia, is kind of a composite being," said senior author Gunter Wegener. "Some of its relatives are multi-carbon hydrocarbon-degrading archaea, others are the long-known own methanogens that form methane as a metabolic product." 

"Microscopy shows that Methanoliparia cells attach to oil droplets. We did not find any hints that it requires bacteria or other archaea as partners."Newly identified microbe has the potential to transform oil to gas

It is important to study Methanogenic microbes because their metabolic product, methane, is a potent greenhouse gas that is 25 times stronger than carbon dioxide in the short term. With this in mind, the team also wanted to investigate how widespread these microorganisms actually are.

"We scanned DNA-libraries and found that Methanoliparia is frequently detected in oil reservoirs - and only in oil reservoirs - all over the oceans. Thus, this organism could be a key agent in the transformation of long-chain hydrocarbons to methane," said Laso-Pérez.

Going forward, the scientists hope to gain many more useful insights into this new microbe. 

"Now we have the genomic evidence and pictures about the wide distribution and surprising potential of Methanoliparia. But we can't yet grow them in the lab. That will be the next step to take. It will enable us to investigate many more exciting details," said Wegener. "For example, whether it is possible to reverse the process, which would ultimately allow us to transform a greenhouse gas into fuel. "

The study is published in the journal <a href="https://mbio.asm.org/">mBio</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: MARUM -- Center for Marine Environmental Sciences

Newly identified microbe has the potential to transform oil to gas

Newly identified microbe has the potential to transform oil to...

For decades, Professor Sharon Long has studied the symbiotic relationships among bacteria that help alfalfa grow, publishing more than 150 papers on this single topic. But now, Long has shifted her focus to citrus greening, which is one of the deadliest diseases for citrus crops in the world. 

"I'm only two generations off a farm, and I read about citrus farmers losing their livelihood and land, and thus also losing generations of family tradition," said Long, who is a biologist at <a href="https://www.stanford.edu/">Stanford University</a>. "We decided to redirect our efforts to work on this problem because we wanted to make a difference."

In the time since Professor Long realized her lab's research could contribute to a solution for citrus greening, her team has found potential treatments for the disease. The researchers have identified 130 compounds to explore further. 

"What we've completed is just a small part of what needs to be done," said study lead author Melanie Barnett. "It's beyond our expertise to pursue these findings to the level needed for real-world application, but it's a foot in the door for researchers who can take those next steps."

By the time that symptoms of the lethal bacterial infection appear, it is too late to save crops from the lethal damage of citrus greening. 

The bacteria that cause the disease, Liberibacter asiaticus, will not grow in a lab and this makes it difficult for scientists to study infected plants. The experts in Professor Long's lab realized they could focus on a distant relative, Sinorhizobium meliloti, which forms symbiotic relationships with certain plants. 

"We've been working on this bacterium for 40 years and have developed tools that allow finely detailed genetic studies to be done," explained Professor Long. "That provides an experimental platform not possible by working directly on this pathogen or even its close relatives."

The researchers introduced genes from the citrus greening bacterium into their familiar S. meliloti cell. These genes are believed to code for a protein that regulates certain aspects of infection.

Next, the team engineered the bacteria so that when the infection-critical proteins were active, the bacteria glowed green in certain light. When they exposed the bacteria to a chemical that inhibits the proteins, the cell would become noticeably less green.

Screening over 120,000 different compounds allowed the experts to pinpoint 130 compounds that visibly reduced the green glow without without affecting the growth of the cell.

"Our system allowed us to find very specific inhibitors that do not harm beneficial bacteria," said Professor Long. "Such inhibitors would be a big improvement compared to environmental spraying of general antibiotics."

The system developed by the team could also be used to test additional chemicals and genes. 

"With this system, any gene from this pathogen or closely related pathogens can be tested in a very controlled way, very efficiently," said Barnett. "The years of research that have gone into studying and working with Sinorhizobium can now save years of time that others would have spent developing such a system from scratch."

The study is published in the <a href="https://www.pnas.org/">Proceedings of the National Academy of 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

Scientists are one step closer to developing treatments for citrus greening

For decades, Professor Sharon Long has studied the symbiotic relationships...

Onshore wind farms in Europe have the capacity to produce 100 times the energy that is currently generated, according to a new study from the <a href="https://www.sussex.ac.uk/">University of Sussex</a> and Aarhus University.

After analyzing all of the suitable sites for onshore <a href="http://www.earth.com/news/wind-farm-efficiency/">wind farms</a>, the team determined that Europe has the potential to supply enough energy for the entire world through the year 2050.

The study revealed that using all of Europe's available capacity for onshore wind farms would result in an installed capacity of 52.5 terawatts of power.

"The study is not a blueprint for development but a guide for policymakers indicating the potential of how much more can be done and where the prime opportunities exist," said Professor Benjamin Sovacool.

"Our study suggests that the horizon is bright for the onshore wind sector and that European aspirations for a 100% renewable energy grid are within our collective grasp technologically."

"Obviously, we are not saying that we should install turbines in all the identified sites but the study does show the huge wind power potential right across Europe which needs to be harnessed if we're to avert a climate catastrophe."

The investigation was focused on advanced data from Geographical Information System (GIS)-based wind atlases. This data provided the team with the detailed insight that was needed to pinpoint all of the areas in Europe that are suitable for wind power generation.

The spatial analysis has now identified more than three times the onshore wind potential in Europe than previous studies.

"Critics will no doubt argue that the naturally intermittent supply of wind makes onshore wind energy unsuitable to meet the global demand," said Professor Peter Enevoldsen.

"But even without accounting for developments in wind turbine technology in the upcoming decades, onshore wind power is the cheapest mature source of renewable energy, and utilizing the different wind regions in Europe is the key to meet the demand for a 100% renewable and fully decarbonized energy system."

The researchers estimated that more than 11 million additional wind turbines could be installed over almost five million square kilometers of terrain.

"One of the most important findings of this study, aside from the fact that it concludes that the European onshore wind potential is larger than previously estimated, is that it facilitates the ability of countries to plan their onshore wind resource development more efficiently, thereby easing the way for commitments by these countries to move entirely to clean, renewable energy for all purposes," concluded Professor Mark Jacobson.

The research is published in the journal <a href="https://www.journals.elsevier.com/energy-policy">Energy Policy</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Image Credit: Envision Energy

The onshore wind farm potential in Europe could power the world until 2050

Onshore wind farms in Europe have the capacity to produce...

Microorganisms in coastal mud can cool the warming climate. New research from the <a href="https://www.uea.ac.uk/">University of East Anglia (UEA)</a> shows that bacteria and microorganisms found in muddy marshes and coastal sediment effectively cool the warming coastal climate.

A nutrient known as dimethylsulfoniopropionate (DMSP) is constantly produced by marine phytoplankton, seaweed, corals, and <a href="http://www.earth.com/news/bacteria-boost-coral-resilience/">bacteria</a>, and is then broken down by marine microorganisms found in coastal sediment. When these microorganisms break down DMSP, they also release a climate-cooling gas called dimethylsulfide (DMS).

"DMS is produced when microorganisms break down DMSP, and it is important because it affects atmospheric chemistry, cloud formation and potentially climate - by increasing cloud droplets that in turn reduce the amount of sunlight reaching the ocean's surface, said lead researcher Professor Jonathan Todd, from UEA's School of Biological Sciences. 

"Across the world's oceans, seas and coasts, tens of millions of tonnes of DMS are released annually by microbes that live in these environments,” he continued. "These same clouds are vital in the movement of large amounts of sulfur from the oceans to land, making the production of DMSP and DMS a critical step in the global sulfur cycle."

The research team studied sediment from the North Norfolk coast at the Stiffkey and Cley salt marches, and each environment produces huge quantities of DMSP and DMS. It was previously thought that these compounds were produced by the marsh grasses, called Spartina, but the study has proved differently.

"Working on these coastal sediments we found that DMSP levels and DMSP and DMS synthesis rates were far higher in the surface sediment than in surface seawater,” said Dr. Beth Williams, also from UEA's School of Biological Sciences. 

"We also found that these high DMSP levels were not dependent on the presence of Spartina, with similar levels being detected at the Yarmouth Estuary, where the plant doesn't grow,” she continued. "Amazingly we discovered that there were as much as 100 million DMSP-producing bacteria per gram of salt marsh sediment. This supports our theory that bacteria play a very significant role in DMSP production in the sediment.”

"Our findings could mean that scientists have been significantly underestimating both the production of this molecule and the effect it is having in the environment," Dr. Williams concluded.

This study is published in <a href="https://www.nature.com/nmicrobiol/">Nature Microbiology</a>.

--

By <a href="mailto:oliviagharvey24@gmail.com">Olivia Harvey</a>, <a href="http://earth.com">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Image Credit: Shutterstock/Simon Annable

Microorganisms in coastal mud can cool the warming climate

Microorganisms in coastal mud can cool the warming climate. New...

Substance found in brown coal can combat tick-borne virus. Scientists have used a combination of high-resolution mass spectrometry and chemoinformatics to identify specific molecular components of humic substances in brown coal, and in the process, found antiviral substances that could combat the tick-borne encephalitis virus.

Humic substances found in <a href="http://www.earth.com/news/europe-coal/">coal</a>, soil, and peat, are one of many natural multicomponent mixtures that are important sources of biologically active compounds. And gaining a better understanding of what these mixtures are made of (a challenging task, in itself) can help scientists develop new drugs.

However, the scientists involved in this study were able to reveal that humic substances inhibit the reproduction of the tick-borne encephalitis virus. They were able to come to this conclusion using high-resolution mass spectrometry to analyze the composition of humic samples and chemoinformatics. 

Using this analysis, the team was able to compare their results against databases of chemical compounds and were able to identify the compounds’ structure. 

These findings were performed by a team of scientists from Russia’s <a href="https://www.skoltech.ru/en/">Skolkovo Institute of Science and Technology (SKOLTECH)</a>, the <a href="http://chumakovs.ru/en/">M.P. Chumakov Federal Scientific Center</a> for Research and Development of Immune-and-Biological Products of the Russian Academy of Science, and <a href="https://www.msu.ru/en/">M.V. Lomonosov Moscow State University</a>. The results were published in <a href="https://www.nature.com/srep/">Scientific Reports</a>.

"We made an attempt at understanding the structural reasons behind the antiviral activity of the molecular components of humic substances,” said Alexander Zherebker, PhD, a Research Scientist from SKOLTECH. “Aware that standard methods of complex mixture separation do not work for humic substances, we looked at some known structures matching the molecular compositions determinable by mass spectrometry and noticed that some structures correspond to compounds often extracted from natural sources, for example, flavonoids.”

“We undertook further mass spectrometry experiments,” he continued, “which suggest that there can indeed be a match between the types of structures we found in the databases and the molecular components of humic systems.”

The study’s results are the first in what will be more detailed research into humic substances and how they can be used in a pharmaceutical setting.

--

By <a href="mailto:oliviagharvey24@gmail.com">Olivia Harvey</a>, <a href="http://earth.com">Earth.com</a> Staff Writer

Image Credit: Shutterstock/Jaromir Chalabala

Substance found in brown coal can combat tick-borne virus

Substance found in brown coal can combat tick-borne virus. Scientists...

It may not just be nerve endings that relay pain from your skin to your brain. Scientists have discovered a mesh-like organ within skin that communicates painful stimuli – and blocking the network in mice reduced their ability to sense pain.

The discovery may help doctors understand chronic pain – and maybe figure out a way to dampen it. 

A team of researchers at the <a href="https://ki.se/">Karolinska Institute</a> found the network of glial cells within skin, which they’ve dubbed the nociceptive glio-neural complex. The glial cells that make up the mesh-like organ are surrounded by structures that appear to be sensitive to stimuli like pain, the researchers said.

“Our study shows sensitivity to pain does not occur only in the skin's nerve fibers, but also in this recently discovered pain-sensitive organ,” lead author Dr. Patrik Ernfors told the <a href="https://www.dailymail.co.uk/ushome/index.html">Daily Mail</a>. “The discovery changes our understanding of the cellular mechanisms of physical sensation and it may be of significance in the understanding of chronic pain.”

Pain can be a good thing. Physical pain is protective – it teaches people to avoid danger, and prevents them from causing more damage to an injured body part by overusing it. In short, pain helps organisms survive.

But chronic pain is different. It can cause long-term suffering, and prevent people from enjoying hobbies or being able to work. 

The mesh-like organ made up of glial cells was originally believed to protect the network of nerves that lace through the skin. The Karolinska Institute team used fluorescent tagging to see how all of the cells related to pain interacted with each other, and that’s when they discovered the nociceptive glio-neural complex was activated by pain stimuli. 

Blocking the network made mice less able to feel mechanical pain such as that caused by abnormal stress to the spine. 

The study has been published in the journal <a href="https://science.sciencemag.org/content/365/6454/695">Science</a>. 

—

By Kyla Cathey, <a href="https://www.earth.com/">Earth.com</a> staff writer

Researchers: mesh-like organ in skin lets us feel pain

It may not just be nerve endings that relay pain...

At least 228 million years ago, an ancient reptile species roamed the massive southern supercontinent known as Gondwana.

The land mass would someday split to become Africa, India, Australia, South America and Antarctica. The reptiles – known as sphenodontians – would eventually go extinct, for the most part, although one living descendant species still lives in New Zealand.

But a jaw and some skull bones discovered in the state of Rio Grande do Sul in southern Brazil is changing what paleontologists and other scientists thought they knew about the diverse sphenodontians – lizards and snakes that lived during the time of the dinosaurs.

The fossils belonged to a member of Clevosaurus hadroprodon, a newly described species about the size of a gecko. The ancient reptile species lived during the late Triassic and early Jurassic periods, and is now the oldest known member of the Clevosauridae family.

But the fossils held some surprises for researchers.

"Clevosaurus hadroprodon is an important discovery because it combines a relatively primitive sphenodontian-type tooth row with the presence of massive tusk-like teeth that were possibly not for feeding, but rather used for mate competition or defense. If correct, this means that non-feeding dental specializations predated changes in the sphenodontian dentition related to feeding strategies. This is a very exciting discovery." co-author Dr. Randall Nydam of <a href="https://www.midwestern.edu/">Midwestern University</a> said.

Until this discovery, scientists had believed that the tusk-like teeth had developed later.

“This feature is typically observed only in later sphenodontian lineages," lead author Dr. Annie Schmaltz Hsiou of the <a href="https://www5.usp.br/">University of São Paulo</a> said. 

The new fossils from the ancient reptile species also hint that sphenodontians may have seen early diversification in separate areas of Gondwana – one that would become South America, and another that would become India.

The team described the newly discovered species in the journal <a href="http://dx.doi.org/10.1038/s41598-019-48297-9">Scientific Reports</a>. Funding for the research was provided by the <a href="http://www.nserc-crsng.gc.ca/index_eng.asp">Natural Sciences and Engineering Research Council of Canada</a>.

—

By Kyla Cathey, <a href="https://www.earth.com/">Earth.com</a> staff writer

Fossils found in Brazil were from ancient reptile species

At least 228 million years ago, an ancient reptile species...

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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...