Fossil footprints from the ancient Carboniferous Period have caused a stir among paleontologists worldwide. These tracks suggest reptiles roamed Earth far earlier than anyone suspected. 



Researchers uncovered <a href="https://www.earth.com/news/fossil-discovery-pushes-back-reptile-evolution-by-40-million-years/" target="_blank" rel="noreferrer noopener">reptile</a>-like footprints in northern Victoria, Australia, and matched them to the era that started around 359 million years ago.



According to Professor John Long from <a href="https://www.flinders.edu.au" target="_blank" rel="noreferrer noopener">Flinders University</a>, these imprints challenge the traditional view of reptile evolution.



<h2 class="wp-block-heading" id="h-footprints-of-reptile-ancestors">Footprints of reptile ancestors</h2>



According to the experts, the tracks suggest that these <a href="https://www.earth.com/news/why-reptiles-are-more-colorful-in-open-habitats/" target="_blank" rel="noreferrer noopener">animals</a> may have appeared roughly 350 million years ago. That date pushes them back to 40 million years earlier than what was previously recorded.



One set of partial prints had distinct claw marks, hinting that these creatures were true reptiles rather than amphibians. Another set showed a smaller front foot and a larger hind foot, which is typical of land-walking vertebrates.



<h2 class="wp-block-heading" id="h-reptile-origins-in-gondwana">Reptile origins in Gondwana</h2>



Scientists have long studied the southern supercontinent <a href="https://academic.oup.com/book/41714/chapter-abstract/353976691?redirectedFrom=fulltext" target="_blank" rel="noreferrer noopener">Gondwana</a>, where many early tetrapods left behind their skeletons and <a href="https://www.earth.com/news/reptiles-provide-new-clues-about-the-diets-of-extinct-animals/" target="_blank" rel="noreferrer noopener">tracks</a>. This find in Victoria adds weight to the idea that pivotal evolutionary steps began in these territories.



At the time, Australia formed a central piece of this landmass. Warmer climates may have played a role in encouraging new adaptations among reptile forerunners.



<h2 class="wp-block-heading" id="h-new-timeline-of-reptile-evolution">New timeline of reptile evolution</h2>



Paleontologists analyze footprints to piece together how ancient <a href="https://www.earth.com/news/largest-ever-marine-reptile-ichthyotitan-severnensis-discovered-by-11-year-old-girl/" target="_blank" rel="noreferrer noopener">animals</a> moved. A set of clawed toes can reveal whether a creature was an amphibian or a reptile.



“This pushes back the likely origin of crown-group amniotes by at least 35-40 million years,” said Professor John Long. The research highlights how vital footprints can be for revealing new timelines.



Reptiles are part of the <a href="https://ucmp.berkeley.edu/vertebrates/tetrapods/amniota.html" target="_blank" rel="noreferrer noopener">amniote</a> group, which includes birds and mammals. The discovery of claw marks in these fossil tracks implies full independence from watery environments, which is a characteristic of reptiles.



Many scientists once assumed that amniotes emerged in the Northern Hemisphere. These footprints raise questions about when and where some of the earliest reptiles spread across ancient landscapes.



<h2 class="wp-block-heading" id="h-shifting-landscapes-and-animal-diversity">Shifting landscapes and animal diversity</h2>



Researchers plan to explore other parts of Victoria for more trace fossils that could fill gaps in the record. They hope future finds will clarify how these animals became adapted for dry land.



Unearthing additional trackways may add to our understanding of how reptiles branched off from amphibians. Each new print can reveal details about posture, movement, and survival tactics.



The Carboniferous Period stretched from about 359 million to 299 million years ago. It featured vast swampy forests, giant insects, and a rise in atmospheric oxygen levels.



Land masses were arranged differently than they are today. Some scientists believe shifting coastlines created niches that spurred new adaptations.



<h2 class="wp-block-heading" id="h-habitats-of-reptile-ancestors">Habitats of reptile ancestors</h2>



Some reptile ancestors likely ventured onto stable ground while others stayed near water. Traces of this transition remain scarce, so every fossil footprint matters.



Even a single impression can show scientists how early amniotes balanced their weight or held their tails. The shape, depth, and spacing can reveal clues about speed or range of motion.



A single fossil slab from Victoria has opened up this debate about reptile origins. Researchers suggest it is significant to re-check older formations in case more reptile evidence has been overlooked.



Professor Long and his team emphasize the need for more fieldwork to confirm whether reptiles appeared across multiple regions at around the same time. They believe this discovery highlights how a single trackway can reshape our ideas about early amniotes.



<h2 class="wp-block-heading" id="h-seeking-more-reptile-footprints">Seeking more reptile footprints</h2>



Future excavations may uncover more footprints from the early stages of reptile evolution. That could bring clarity to how quickly these animals adapted to life away from water.



Technological advancements like high-resolution scans can make it easier to analyze the details of each print. Insights like these help paleontologists reconstruct entire ecosystems from a few traces left in stone.



Footprint analysis often involves laser scanning to capture 3D shapes. These scans can highlight fine ridges that point to muscle strength or toe flexibility.



Traces of skin patterns, though rare, can also indicate the texture of scales. Each layer of mud or sand holds hints about local conditions.



<h2 class="wp-block-heading" id="h-early-land-adaptation-of-reptiles">Early land adaptation of reptiles </h2>



Before amniotes, vertebrates such as fish and amphibians still needed water for reproduction. Over time, eggs with protective membranes evolved and these allowed animals such as reptiles to venture inland.



That transition set the stage for reptiles, birds, and mammals to diversify into countless forms. These footprints mark a link in that long chain.



Researchers compare new prints to known trackways from synapsids and early amphibians. Key distinctions include toe curvature and the presence of claws.



Synapsids, which later led to mammals, often left broader footprints with different digit spacing. Reptile-like tracks, on the other hand, typically show sharper claw impressions.



<h2 class="wp-block-heading" id="h-ancient-footprints-of-reptile-ancestors">Ancient footprints of reptile ancestors</h2>



These ancient footprints connect modern wildlife to ancestors that once explored muddy banks. Each imprint brings a sense of wonder about how life took shape on land.



Understanding those steps may also shed light on broader evolutionary processes. After all, reptile success paved the way for the future rise of dinosaurs and beyond.



Scientists emphasize that no single discovery stands alone. Footprints, bones, and environmental data must all be pieced together to form a coherent story.



Though incomplete, this record keeps expanding thanks to fresh finds in unexpected places. Each new track offers a glimpse into a time of rapid evolutionary change.



The study is published in the journal <a href="https://www.nature.com/articles/s41586-025-08884-5" target="_blank" rel="noreferrer noopener">Nature</a>.



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Reptile ancestors appeared 40 million years earlier than we thought

Fossil footprints from the ancient Carboniferous Period have caused a stir among paleontologists worldwide. These tracks suggest reptiles roamed Earth far earlier than anyone suspected. Researchers uncovered reptile-like footprints in northern Victoria, Australia, and matched them to the era that started around 359 million years ago. According to Professor John Long from Flinders University, these imprints challenge the traditional view of reptile evolution. Footprints of reptile ancestors According to the experts, the tracks suggest that these animals may have appeared roughly 350 million years ago. That date...

A new study led by the <a href="https://www.awi.de/en/">Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research</a> has found that increases or decreases in the volume of the Greenland Ice Sheet (GrIS) significantly lag climate changes. These findings suggest that our current <a href="https://www.earth.com/news/new-rainfrog-named-after-climate-activist-greta-thunberg/">climate</a> could still influence the size of the ice sheet thousands of years later.



Scientists all over the world fear that one of the effects of global warming will be the melting of the GrIS, a phenomenon expected to lead to dangerous <a href="https://www.earth.com/news/sea-levels-are-rising-at-an-alarming-rate/">sea level rises</a>, which may negatively impact a large number of ecosystems. However, since observational studies of the status of GrIS span only a few decades, there are still great uncertainties regarding the speed and amount of its future disintegration.



By using computer models to simulate the evolution of the GrIS from the last interglacial period to the end of the 21st century, scientists have found that the gradual cooling of our planet which started after the extremely hot period called the “<a href="https://www.ncdc.noaa.gov/global-warming/mid-holocene-warm-period">Holocene Thermal Maximum</a>” (dating 10,000 to 6,000 years ago) has influenced for thousands of years the dimensions and dynamics of the GrIS, and still has a strong impact today.



“Given that Greenland’s climate was getting colder from the Holocene Thermal Maximum to the Pre-Industrial era, our simulation implies that the GrIS experienced a background growth from the mid-Holocene to the industrial era. Due to this background trend, the GrIS still gains mass until the second half of the 20th century, even though anthropogenic warming begins around 1850 AD,” explained the study authors.



“Our results highlight that the present evolution of the GrIS is not only controlled by the current climate change, but also affected by paleoclimate, especially the relatively warm Holocene climate. We propose that the GrIS was not in equilibrium throughout the entire Holocene and that the slow response to Holocene climate needs to be represented in ice sheet simulations in order to predict ice mass loss, and therefore sea level rise, accurately.”



These findings imply that the current climate changes that we experience will have a much longer and less predictable impact on the state of the GrIS. Further research is needed to better understand the long-term impacts of climate, and thus to properly predict future changes in our planet’s geography and ecosystems.



The study is published in the journal <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0259816">PLoS One</a>.



---



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

Greenland has a delayed response to climate change

A new study led by the Alfred Wegener Institute Helmholtz...

Mammals have a pharynx, or throat, that starts at the back of the nose and ends below the back of the mouth. Although the pharynx is a single tube, it leads into two separate tubes - the windpipe, through which air reaches the lungs, and the esophagus, through which food reaches the <a href="https://www.earth.com/news/lizard-preserved-stomach-microraptor/">stomach</a>. The separation of the respiratory and digestive tracts at the base of the pharynx is critical for survival; air must be directed from the pharynx into the lungs, but food must be directed towards the stomach and must not enter the lungs.



This anatomical arrangement presents problems for mammals, who must avoid inhaling their food when they try to swallow it. This is the cause of choking and can be fatal. The situation is even more complicated for baleen whales, which feed while underwater. They open their mouths wide and lunge through a shoal of fish or small invertebrates, taking in numerous small prey items along with thousands of liters of water that must not flow into the windpipe.



Researchers at the <a href="https://www.ubc.ca/">University of British Colombia</a> in Vancouver have recently published a study that shows how baleen whales, also known as rorquals, achieve the separation of respiratory and digestive tracts while their mouths experience these extreme physical forces. They identified an anatomical mechanism that protects the whale’s airway as tons of water gushes into its mouth - they term this bulbous region of the soft palate the “oral plug.”



“We discovered a structure in fin whales, which likely exists in all lunge-feeding whales, or rorquals,” said Kelsey Gil of the UBC Zoology Department. “We’ve termed it the ‘oral plug’ and found that it blocks the channel between mouth and pharynx. It means that when a whale lunges, the entrance to the pharynx and thus the respiratory tract is protected.”



Although the mechanics of lunge feeding by whales was well understood, not much was known about how prey such as krill are manipulated and swallowed after a lunge. In addition, the general anatomy of the larynx was also well known. This is a hollow organ in the upper airway that is also the location of the vocal cords and has been investigated in connection with whale vocalizations. However, not much was known about the structure of the rest of the pharynx, the critical junction between respiratory and digestive tracts.&nbsp;



“It’s impossible to study this in a living whale, so we rely on tissue from deceased whales and use functional morphology to assess the relationship between a structure and its function,” said Gil.&nbsp;



By examining and dissecting adult and fetal fin whales, the researchers found that a musculo-fatty structure, the oral plug, seals the back of the mouth and pharynx when the whales feed. They manipulated the various structures to see how they could move. They also looked at the direction of muscle fibers to understand how they would move when muscles contracted and shortened.



“The oral plug is a part of the soft palate, so simply considering the gross anatomy, there is only one direction it should move,” explained Gil. “When the oral plug moves backward and upward to block the nasal cavities, it means that no other structure can be in that same spot below the nasal cavities. This forced us to then examine the larynx, since that spot is where we would expect to see the larynx during breathing, but it cannot be in that position during swallowing.”



During swallowing, the oral plug is lifted and this allows food to pass from the mouth into the pharynx. At the same time, the lifted plug protects the upper airways from food entry. The larynx is positioned at the floor of the pharynx, where laryngeal cartilages close to protect it. A muscular sac attached to the bottom of the larynx is forced upwards into the laryngeal cavity to completely block the lower respiratory tract.



The findings, published in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</a>, also show that the pharynx in fin whales - and likely all rorquals - can only be used by either the respiratory or the digestive tract at any one time. This protects the animals from choking while feeding.&nbsp;



According to the researchers, no structure like the oral plug has been reported in any other animals. “There are very few animals with lungs that feed by engulfing prey and water, so the oral plug is likely a protective structure specific to rorquals that is necessary to enable lunge feeding,” said Gil.



The study authors conclude that these adaptations to facilitate swallowing in lunge-feeding whales were a critical development in the evolution of large body size. The largest animal species ever to have lived is thought to be the blue whale, which feeds in precisely this way.



---



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

"Oral plug" prevents whales from drowning while they eat

Mammals have a pharynx, or throat, that starts at the...

The January 2020 eruption of the Taal <a href="https://www.earth.com/news/secrets-of-hot-spot-volcanoes-revealed/" data-type="news" data-id="1895520">volcano</a> in the Philippines became electrified and led to an hours-long thunderstorm, with thousands of cloud-to-ground lightning strikes. A new study conducted by the <a href="http://usgs.gov">United States Geological Survey</a>, the National Oceanic and Atmospheric Administration, and Vaisala Inc. highlights how advances in global lightning detection can provide new ways to characterize explosive volcanism.



According to scientists, explosive volcanic eruptions can create lightning that is detected around the world almost instantaneously. Since the radio waves produced by lightning travel at the speed of light, they can be detected extremely fast even from highly remote areas.&nbsp;



“As soon as the volcanic ash plume rose high enough to freeze, its electrical activity lit up our sensors,” said study lead author Alexa Van Eaton, a physical volcanologist at the U.S. Geological Survey. “It’s the perfect storm - explosive eruptions can create lightning that is detected around the world.”



Moreover, since satellite images and hundreds of photos and videos posted on social media were also available, Van Eaton and her colleagues could form a more complex picture of how the eruption developed and caused the massive thunderstorm.



“Much more can be done to characterize an eruption when there are camera perspectives from all angles,” said Van Eaton. &nbsp;“The eruption took place in a major urban area, so people posted pictures of volcanic lightning as it was happening, revealing a highly electrified region at the base of the umbrella cloud. Understanding the evolution of volcanic lightning helps us recognize the early warning signs of ash hazards to aircraft.”



However, the researchers admitted that remote-sensing studies such as this one can only provide “a broad-brush picture of an eruption” and cannot replace the work of local geologists that know the area very well.



Further research is needed to explain in more detail the miniature sparks observed in photos of the ash plume. “We were surprised to find the high-altitude umbrella cloud crawling with these tiny, blue&nbsp;streamers” that are distinct from lightning because they are discharges of cold rather than hot plasma. “It’s still an enigma how these little ribbons of ionized air relate to powerful lightning,” concluded Van Eaton.&nbsp;



The study is published by the <a href="https://www.geosociety.org/">Geological Society of America</a> in the journal Geology.



---



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

Explosive volcanic eruption triggered an hours-long thunderstorm

The January 2020 eruption of the Taal volcano in the...

When a breeder of tarantulas noticed, in 2018, that several of his spiders were becoming sick and dying, he approached parasitologist Adler Dillman from the <a href="https://www.ucr.edu/">University of California, Riverside</a>. The ailing tarantulas were characterized by what appeared to be a white discharge in and around the oral cavity. On closer inspection, however, it became clear that the white mass was a large infestation of nematode <a href="https://www.earth.com/news/worms-without-ears-can-hear-through-their-skin/">worms</a> intertwined together inside and around the spider’s mouth.&nbsp;



Dillman and his colleagues examined the worms and, based on a combination of morphological and morphometrical data, and unique DNA sequences, they identified a new species of nematodes. There are more than 25,000 different species of nematode worms and they are among the most abundant animals on Earth. They parasitize a wide range of living organisms, but this is only the second time that a species has been found to infect tarantulas.



The scientists named the new species Tarantobelus jeffdanielsi, after Jeff Daniels, the American actor, musician and producer. They named it in Daniels’ honor because his character in the 1990 film ‘Arachnophobia’ saves a town from a deadly infestation of spiders.&nbsp;



“His character in the film is a spider killer, which is exactly what these nematodes are,” said Dillman, who led the team that discovered the nematode.



“When I first heard a new species of nematode had been named after me, I thought, ‘Why? Is there a resemblance?’” joked Daniels. “Honestly, I was honored by their homage to me and 'Arachnophobia.' Made me smile. And of course, in Hollywood, you haven’t really made it until you’ve been recognized by those in the field of parasitology.”



The scientists investigated the lifecycle of the worms, and where exactly they resided in the infected spiders. They found that infestations of worms occurred in the mouth area and on the pedipalps, special appendages near the mouth that the spiders use to sense and manipulate food. No worms were found in the stomachs of infected spiders.&nbsp;



Once infected, spiders lost the ability to use their jaws and feed themselves, and began to show strange behavior, such as walking on the very tips of their legs. The infection would ultimately prove fatal for a tarantula, as it would starve to death.&nbsp;



“It may take months because tarantulas don’t have to eat particularly often. However, if they get this infection, they will die of starvation,” Dillman said.&nbsp;



When culturing the nematode worms in the laboratory, the researchers noted that they ate bacteria such as E. coli and did not appear to feed off the parasitized spiders themselves. This led the researchers to conclude that the worms may be feeding on the bacteria found around the oral cavity of the spider.&nbsp;



However, there is not yet an understanding of how the worms change tarantula behavior or render the pedipalps and jaws non-functional. Dillman is planning additional studies to investigate this, as well as how breeders can treat or even prevent infections in their captive-bred tarantulas.



The researchers found that the average lifespan of jeffdanielsi nematodes in the laboratory was 11 days. These worms are mostly hermaphrodites – each individual produces sperm as well as eggs. Furthermore, they fertilize themselves and each produces approximately 160 offspring within its 11-day lifespan.



Although this is only the second time that nematode parasites have been found infecting tarantulas, Dillman feels this reflects the fact that little research is done on these spiders. Nematode worms are very common parasites and it would be unusual if there were no species that parasitized tarantulas.



“Nematodes have been around for hundreds of millions of years. They’ve evolved to infect every kind of host on the planet including humans,” he said. “Any animal you know of on planet Earth, there’s a nematode that can infect it.”



The team’s work describing jeffdanielsi has recently been&nbsp;<a href="https://meridian.allenpress.com/journal-of-parasitology/article-abstract/108/1/30/476785/TARANTOBELUS-JEFFDANIELSI-N-SP-PANAGROLAIMOMORPHA?redirectedFrom=fulltext">published</a>&nbsp;in the&nbsp;<a href="https://meridian.allenpress.com/journal-of-parasitology">Journal of Parasitology</a>.



---



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

Scientists have discovered worms that kill tarantulas

When a breeder of tarantulas noticed, in 2018, that several...

Protecting 30 percent of land and <a href="https://www.earth.com/news/ocean-heat-reached-a-record-high-for-the-sixth-straight-year/">sea</a> by 2030 is an important benchmark, but it will not be enough to halt and reverse biodiversity loss, according to a team of more than 50 scientists from 23 countries. 



The experts delivered a synthesis of the science supporting 21 targets in a draft of the <a href="https://www.cbd.int/article/draft-1-global-biodiversity-framework">Post-2020 Biodiversity Framework</a>, a plan being negotiated by the United Nations.



The scientists are calling for systematic changes, including substantial reductions in damaging fisheries and farming subsidies, great reductions in overconsumption, and limiting global warming to 1.5°C.&nbsp;



Paul Leadley, a professor at Paris-Saclay University, is also an assessment leader and past chair of <a href="http://www.biodiscovery.com/">BioDISCOVERY</a>.



“The target of protecting 30% of all land and seas is important and attracting a lot of attention. And expanding protected areas is a good start if done well, but far short of what's needed to halt and reverse biodiversity loss - called ‘bending the curve’ for biodiversity."



"There’s very good evidence that we will fail again to meet ambitious international biodiversity objectives if there’s too much focus on protected areas at the expense of other urgent actions addressing the threats to biodiversity.”&nbsp;



“Governments are clearly struggling with the breadth and depth of the ‘transformative changes’ needed to bend the curve for biodiversity, and sometimes seem unwilling to face up to it.&nbsp; But deep changes are necessary and will greatly benefit people in the long run.”



The key points highlighted in the study were that reversing biodiversity loss requires transformative change, coordinated at every level. Along with these changes, assessments must be carried out and greater monitoring efforts funded. Perhaps most importantly, action must be taken immediately to be impactful.&nbsp;



“The sooner we act the better. Time lags between action and positive outcomes for biodiversity can take decades so we must act immediately and sustain our efforts if we are to reach the global goals by 2050," said study co-author Maria Cecilia Londoño Murcia of the Humboldt Institute.



"The time needed for safeguarding and restoring ecosystem structure, function and resilience is particularly critical for people and communities whose livelihoods and well-being directly depend on these systems and the benefits they provide.”&nbsp;



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

Sweeping changes needed to reverse biodiversity loss

Protecting 30 percent of land and sea by 2030 is...

One of the most striking discoveries in Astrophysics over the past decades is that <a href="https://www.earth.com/news/dozens-of-free-floating-planets-found-in-the-milky-way/">planets</a> or satellites with oceans beneath layers of rock or ice are quite common in our solar system. Some major examples of these “interior water ocean worlds” (IWOWs) are the icy satellites of giant planets, such as Europa, Enceladus, or Titan, or distant planets like Pluto.&nbsp;



Mimas is the small, innermost moon of Saturn, which was previously thought to be a frozen, inert satellite. By identifying a curious libration, or oscillation, in the rotation of Mimas, a research team led by the Southwest Research Institute (SwRI) has discovered that this satellite is in fact an IWOW. The experts found a liquid, internal ocean hidden under a thick icy shell.



“Because the surface of Mimas is heavily cratered, we thought it was just a frozen block of ice,” said study lead author Alyssa Rose Rhoden, an expert in the Geophysics of icy satellites at SwRI. “IWOWs, such as Enceladus and Europa, tend to be fractured and show other signs of geologic activity.”&nbsp;



“Turns out, Mimas’ surface was tricking us, and our new understanding has greatly expanded the definition of a potentially habitable world in our solar system and beyond. If Mimas has an ocean, it represents a new class of small, ‘stealth’ ocean worlds with surfaces that do not betray the ocean’s existence.”



According to the scientists, tidal heating within this satellite must be large enough to keep the ocean from freezing, but small enough to maintain a thick, steady-state ice shell covering it. Further research is needed to shed more light on the complex factors leading to this peculiar equilibrium on Mimas, and to clearly understand how its ocean formed and evolved.



“Although our results support a present-day ocean within Mimas, it is challenging to reconcile the moon’s orbital and geologic characteristics with our current understanding of its thermal-orbital evolution,” Rhoden said.&nbsp;



“Evaluating Mimas’ status as an ocean moon would benchmark models of its formation and evolution. This would help us better understand Saturn’s rings and mid-sized moons as well as the prevalence of potentially habitable ocean moons, particularly at Uranus. Mimas is a compelling target for continued investigation,” she concluded.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/abs/pii/S0019103521005091?via%3Dihub">Icarus</a>.



---



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

"Stealth” ocean discovered on one of Saturn’s moons

One of the most striking discoveries in Astrophysics over the...

Insects don’t have noses and are not able to “smell” the roses in the familiar sense of the word. Instead, most odor molecules are detected by chemoreceptors that occur on an insect’s antennae. Using these chemical receptors, insects are capable of perceiving and differentiating between thousands of&nbsp;airborne compounds. They use these chemical signals to locate forage <a href="https://www.earth.com/news/some-plants-wont-survive-the-loss-of-seed-dispersing-animals/">plants</a> and mates, as well as to avoid predators.



But now, new research indicates that common air pollutants present in rural and urban environments may be hampering the ability of insects to detect the chemical signals so crucial to their activity as pollinators.&nbsp;



A team of scientists from the <a href="http://www.reading.ac.uk/">University of Reading</a> has conducted the first study to observe that common air pollutants, including diesel exhaust fumes and ozone, have a negative impact on the success of pollination by insects.&nbsp;



“We knew from our previous lab studies that diesel exhaust can have negative effects on insect pollinators, but the impacts we found in the field were much more dramatic than we had expected," said Dr. Robbie Girling, who led the project.



These previous laboratory studies by members of the Reading team showed that&nbsp;chemicals in <a href="https://www.reading.ac.uk/news-archive/press-releases/pr649662.html">diesel fumes react with and can change the scents of flowers such that the insects cannot locate the flowers. </a>The research suggested that pollution could contribute to the ongoing declines in pollinating insects, by making it harder for them to locate the pollen and nectar that form their food.



In the new study, the researchers aimed to gather evidence showing how air pollution affects different species of pollinating insects, some of which rely on scent more heavily than others.



The study, funded by the Natural Environment Research Council, used a purpose-built fumigation facility to regulate levels of nitrogen oxides (NOx) – present in diesel exhaust fumes – and ozone in an open field environment. They then observed the effects these pollutants had on the pollination of black mustard plants by free-flying, locally-occurring pollinating insects over the course of two summer field seasons.



Although the experiments made use of pollution levels that were way below the maximum acceptable levels considered as safe in the US, the results of the field experiments were dramatic. The researchers observed 62 to 70 percent fewer pollinator visits to the plants located in polluted air. This reduction was seen in seven different groups of pollinators, including bees, moths, hoverflies and butterflies.&nbsp;



There were also 83 to 90 percent fewer visits to flowers by these insects, and ultimately a 14 to 31 percent reduction in pollination success, based on the measurement of seed yield and other factors.



“The findings are worrying because these pollutants are commonly found in the air many of us breathe every day," said Dr. James Ryalls. "We know that these pollutants are bad for our health, and the significant reductions we saw in pollinator numbers and activity shows that there are also clear implications for the natural ecosystems we depend on.”



Insects are important pollinators of crops upon which we depend for food and so a reduction in pollinating activity could have far-reaching economic and social consequences. Around 70 percent of crop species rely on insects for pollination; these include apples, strawberries and cocoa.&nbsp;



In addition, pollination supports around eight percent of the total value of agricultural food production, worldwide. The pollinating activity of insects thus generates hundreds of billions of pounds worth of economic value each year.&nbsp;



Furthermore, far higher levels of air pollutants are found in many areas around the world where people and businesses breach the regulations. For example, a&nbsp;<a href="https://www.independent.co.uk/climate-change/news/air-pollution-england-defra-labour-who-nitrogen-dioxide-luke-pollard-b404484.html?r=55147">2019 analysis</a> recorded illegal levels of nitrogen dioxide present in local authorities, in large areas of northern England (including Cheshire and Gateshead), and in southern England (including Wiltshire, Chichester and rural areas such as the New Forest).



“This truly cross-disciplinary work demonstrated very clearly how atmospheric pollutants negatively impact on pollination with direct consequences for food production as well as the resilience of our natural environment," concluded study co-author Dr. Christian Pfrang.



Their results are published today in the <a href="https://doi.org/10.1016/j.envpol.2022.118847">&nbsp;journal&nbsp;</a><a href="https://www.journals.elsevier.com/environmental-pollution">Environmental Pollution</a>.



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

Air pollutants confuse pollinators and reduce food production

Insects don’t have noses and are not able to “smell”...

In a new study from <a href="https://wsu.edu/">Washington State University</a> (WSU), experts have found that a high protein diet increases the risk of kidney <a href="https://www.earth.com/news/coffee-stimulates-digestion-and-protects-against-disease/">disease</a> and premature death among captive polar bears. 



Previous studies have suggested that there is a similar link between kidney disease and excessive protein consumption among humans. The Mayo Clinic reports that a high-protein diet may worsen kidney function in humans, particularly in the long term, because the body may struggle to eliminate all the waste products.



A research team led by WSU wildlife biologist Charlie Robbins investigated what zoos have typically been feeding polar bears. The study revealed that their diet usually consists of a food ratio intended for big cats, containing about two to three parts protein to one part fat. This diet is the opposite of what polar bears would be eating in the wild.&nbsp;



“Zoos made some assumptions in the past about the nutritional requirements of polar bears because their diet is almost exclusively animals,” said Professor Robbins. “But, unlike cats, they do not need and cannot tolerate high protein.”



Even though polar bears are carnivores that feed mainly on seals, researchers have found that they have physiology that is more closely aligned with humans and other omnivores.



Looking at death records of captive polar bears, the researchers discovered that the most common cause of death was kidney disease. Bears with fatal kidney disease died 10 years earlier than bears without the condition. The second most common causes of death were liver disease and cancer, according to the analysis.&nbsp;&nbsp;



Out of more than 600 bears examined in the wild, the team found no evidence kidney disease.



“A slate of early deaths across sexes that is limited to two major organs raised several red flags for us,” said Professor Robbins, who has researched both grizzly and polar bear nutrition for more than 35 years.



Former WSU graduate student Karyn Rode conducted field studies which showed that wild polar bears prefer a diet that is two parts fat to one part protein.



“Although we knew that polar bears selected for the blubber of their prey, this was the first time we were able to quantify how much fat they were actually consuming,” said Professor Robbins. “When it comes to feeding polar bears, the general mindset has been that they are carnivores. No one has really been paying attention to the amount of protein they might need, much less limitations on how much they might tolerate.”



In the current paper, the researchers propose that - like humans - both polar and grizzly bears require relatively low levels of protein. When captive bears were offered their choice of blocks made up of pure lard and blocks made up of high protein meat, they ultimately consumed the same ratio of fat to protein as their relatives in the wild.



The study authors recommend that zoos should adopt alternative foods for captive polar bears that mimic the fat-protein ratio found naturally in the wild. Once these alternatives are introduced, monitoring the animals could help experts determine whether the new diets may improve their health and longevity.



The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/10982361">Zoo Biology</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

High protein diet causes kidney disease in polar bears

In a new study from Washington State University (WSU), experts...

There are a few species of beetles that can jump, but beetle larvae tend to squirm across the substratum and have never been seen doing acrobatic jumps -- until now.



A team of researchers has published a scientific article documenting the jumping behavior of larval lined flat bark beetles (Laemophloeus biguttatus). This type of <a href="https://www.earth.com/news/animal-locomotion-natural-energy/">locomotion</a> has not been recorded for beetle larvae before. 



The larvae are able to spring into the air with a speed of around 0.5 meters per second, and to travel forwards a distance approximately equivalent to four times their own body length. While flying through the air, the larva curls itself into a loop and as it lands, it bounces and rolls along until it becomes stationary.&nbsp;



“Jumping at all is exceedingly rare in the larvae of beetle species, and the mechanism they use to execute their leaps is – as far as we can tell – previously unrecorded in any insect larvae,” said study co-author Matt Bertone, director of <a href="https://www.ncsu.edu/">North Carolina State University</a>’s Plant Disease and Insect Clinic.&nbsp;



“The way these larvae were jumping was impressive at first, but we didn’t immediately understand how unique it was,” said Bertone. “We then shared it with a number of beetle experts around the country, and none of them had seen the jumping behavior before. That’s when we realized we needed to take a closer look at just how the larvae was doing what it was doing.”



Usually when insects make impressive jumps, they rely on a “latch-mediated spring actuation mechanism.” This means that two parts of the body latch onto each other while the insect exerts force using its muscles. When this builds up a significant amount of potential energy, the insect unlatches the two parts and all the stored energy is released at once. This results in an action-packed spring off the ground.



The researchers looked for a two-part latch mechanism on the surface of the lined flat bark beetle larvae and found nothing. Then, they used microCT scans to measure how much muscle the beetle larvae had and calculated whether this would provide enough power to launch the larvae into the air at a speed of 0.5 meters per second. The larvae did not have enough muscle to achieve this by muscle action alone.&nbsp;



The conclusion was that the larvae must be using some form of spring-loaded system to achieve their acrobatic jumps. This is when Bertone and study co-author Adrian Smith decided to film the behavior in order to get a better understanding of what was taking place. Smith is a research assistant professor of biological sciences at NC State and head of the Evolutionary Biology &amp; Behavior Research Lab at the North Carolina Museum of Natural Sciences.



The team filmed some jumps at 60,000 frames per second and were able to see that the beetle larvae actually hook their feet into the ground as they arch their bodies and prepare to jump. As soon as one foot loses its grip on the ground, the spring is released and the larva is propelled into the air under the power of its body’s own potential energy store.



“What makes the&nbsp;L. biguttatus&nbsp;so remarkable is that it makes these leaps without latching two parts of its body together,” said Bertone. “Instead, it uses claws on its legs to grip the ground while it builds up that potential energy – and once those claws release their hold on the ground, that potential energy is converted into kinetic energy, launching it skyward.”



Meanwhile, in&nbsp;<a href="https://www.youtube.com/watch?v=SEst5RERHJ4">an unrelated video about jumping maggots</a>, Smith had included a short clip of the jumping behavior in&nbsp;L. biguttatus. That video was seen by Takahiro Yoshida, a researcher from Tokyo Metropolitan University in Japan, who had witnessed similar jumps in the larvae of another beetle species called&nbsp;Placonotus testaceus, but had not published anything related to the behavior. Yoshida is a co-author on the publication about this unusual form of locomotion.



“We don’t have high-speed footage of&nbsp;P. testaceus, but the video evidence we do have from Yoshida’s lab suggests that this previously unknown behavior is found in two different genera which are not even closely related,” said Bertone.



“This raises a lot of questions. Has this behavior evolved separately? Is it found in other beetle species? Are these genera more closely related than we previously suspected? There’s a lot of interesting work to be done here.”



Details of this unusual method of locomotion in lined flat bark beetle larvae are published today in the journal <a href="https://journals.plos.org/plosone/">PLOS ONE</a>.



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

Unusual jumping behavior recorded in beetle larvae

There are a few species of beetles that can jump,...

A new study from the <a href="https://www.ubc.ca/">University of British Columbia</a> has revealed that 45 percent of the fish that cross through two or more exclusive economic zones (EEZs) will shift their movement patterns by 2100. This is expected to possibly bring international conflict.&nbsp;



By 2030, 23 percent of these fish are predicted to change their historic ranges. By 2100, this increases to 45 percent of the transnational fish, along with 81 percent of EEZs seeing at least one species shift. The culprit for these changes is, of course, human-caused climate change.&nbsp;&nbsp;&nbsp;&nbsp;



“This is not only an issue of stocks leaving or arriving to new EEZs, but of stocks that are shared between countries, completely changing their dynamics,” said study lead author Dr. Juliano Palacios-Abrantes, who conducted the study while at UBC’s Institute for the Oceans and Fisheries (IOF).&nbsp;



“We will see even more dramatic changes by 2030 and onwards, given current emissions rates. Many of the fisheries management agreements made to regulate shared stocks were established in past decades, with rules that apply to a world situation that is not the same as today.”



The researchers tracked the changing ranges of 9,132 transnational fish populations, which account for 80 percent of the catch from the world's exclusive economic zones. The research started in 2006 and continued forward with projections predicted up to 2100.&nbsp;&nbsp;



“By providing estimates of the size and timing of projected shifts, our study offers tangible reference points around which to consider climate change impacts and negotiate fair policies for sustainable management” said study co-author Dr. Colette Wabnitz, lead scientist at Stanford’s Center for Ocean Solutions.



“We must accept that climate change is happening, and then move fast enough to adapt fisheries management regulations to account for it,” said co-author Dr. Gabriel Reygondeau, a research associate at IOF.



The scientists hope their study can create a framework for international negotiations and planning to create a well designed fisheries management plan for the future. Without this, conflict, even violent conflict could arise over dwindling fish populations supporting a hungry human populace.&nbsp;



The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/13652486">Global Change Biology</a>.&nbsp;



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

Nearly half of the world’s shared fish are on the move

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

The story goes that, in 1820, a farmworker in the fields around Debenham in Suffolk, spotted a spectacular ear of barley. John Andrews picked the ear and planted the seeds at home in his <a href="https://www.earth.com/news/urban-gardens-provide-a-reliable-food-supply-for-pollinators/">garden</a>. When his landlord, Charles Chevalier, saw the remarkable barley that grew from these seeds, he was impressed and wished to grow more of it. He harvested it and began to propagate more plants, calling the new variety “Chevalier.”



At the time, barley was very important in the malting process used in the brewing of beer and very soon the new variety was being grown widely. In fact, by the end of the 19th century more than 80% of all malting barley in England was of the Chevalier type. The properties of this variety were considered so superior that the name Chevalier became synonymous with malting barley.&nbsp;



The variety became popular around the world, including in Sweden, where it was cultivated and improved, using breeding techniques, during the second half of the 19th century.&nbsp; Today, Chevalier is part of the lineage of many modern malting barley varieties and beer brewers have begun to consider returning to the use of this type, as well as other classic varieties of barley.



This has led Swedish researchers from the universities of Linköping and Stockholm to investigate whether the Chevalier variety of barley did indeed originate from a single plant, as described anecdotally. They wished to clarify how this cultivar was spread and adopted to Nordic seed systems of the time, and used molecular genetic analysis to establish whether the early Chevalier variety was used for selective breeding purposes to produce today’s varieties of malting barley.



“When we started this study, we were primarily curious about whether Chevalier barley had been discovered and used in the same way as today’s modern varieties, with a genetic signature unique to Chevalier, and where the name is a sort of brand name for a certain kind of product,” said Jenny Hagenblad, associate professor of population genetics at the Department of Physics, Chemistry and Biology (IFM) at Linköping University.



The researchers tested seeds from two different sources. Firstly, seeds were obtained from museum specimens of historical grains labeled “Chevalier.” These samples had been collected and stored at various times during the 19th century, with the oldest sample dating from 1865. Secondly, the researchers used seeds from current Chevalier accessions preserved in genebanks. In total, 282 individual seeds, representing 47 accessions, were used in the study.&nbsp;



Genetic analysis of the seeds revealed that many of them did indeed belong to a specific variety – Chevalier, and that this variety had been bred and kept pure for its superior malting qualities. From the very beginning, Chevalier was considered a premium malting barley and sold at higher prices than other cultivars. Farmers may have gone to great lengths to keep this cultivar pure, long before they knew the details of Mendelian inheritance or genes. In the light of these samples of pure Chevalier seeds, researchers were tempted to think it possible that a single plant may have given rise to all successive generations of this type of barley.&nbsp;



However, not all the sample jars marked “Chevalier” contained true Chevalier barley seeds.&nbsp;



Some of the samples contained unimproved landrace barley, representing the varieties that were present in Nordic countries before the introduction of the Chevalier cultivar. Other samples contained mixtures of Chevalier and landrace seeds, while a few samples also had seeds that were, hybrids (crosses) between Chevalier and other varieties.&nbsp;



From these results it was clear that the designation “Chevalier” was applied rather loosely in the 19th century. The seed mixtures indicated that, after the Chevalier variety was brought to Sweden, local farmers mixed it – deliberately or accidentally –with seeds from local landraces.&nbsp;



Although barley is usually self-fertilizing, there is a small incidence (2%) of cross-fertilization. This can lead to the development of a hybrid variety which would then have characteristics of both the Chevalier parent and the local landrace parent. The result would be a Chevalier-type malting barley that was also adapted to local environmental conditions. Not only did this generate new diversity from which farmers could obtain their future seeds, but hybrids often give increased yield as well.



According to the authors of the study, their findings indicate that farmers were practicing plant improvement methods long before there was an understanding of genetics. The processes used during the 1800s by farmers in Sweden were not very different from the plant improvement methods developed in the early 20th century, when genotypes superior in yield or quality were combined with locally adapted material to create the first modern cultivars.



“We can see signs of how people, long before the development of modern plant breeding, were already unwittingly using the very methods that became the foundation for the revolution in Swedish farming during the early 20th century,” said study co-author Matti Leino, a researcher in crop history at Stockholm University.



The results of the study have been published in the journal&nbsp;<a href="https://acsess.onlinelibrary.wiley.com/journal/14350653">Crop Science</a>.



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

Barley was bred for exceptional qualities in the 19th century

The story goes that, in 1820, a farmworker in the...

A new study from the <a href="https://www.ubc.ca/">University of British Columbia</a> has taken a closer look at the ultraviolet "bullseye" patterns found on sunflowers. The ultraviolet (UV) <a href="https://www.earth.com/news/dragonfly-wing-colors-driven-by-climate-and-sexual-selection/">colors</a> are invisible to humans, yet clearly visible to many insects.&nbsp;



The bullseye patterns were already known to make the flowers more attractive to bees, but scientists have now discovered that they do much more. The researchers found that chemicals in the UV markers also help the plants respond to stress from drought and extreme temperatures.&nbsp;&nbsp;&nbsp;&nbsp;



“Unexpectedly, we noticed that sunflowers growing in drier climates had flowers with larger UV bullseyes, and found that those flowers are able to retain water more efficiently. This suggests that these larger UV bullseyes help plants adapt to these drier environments,” said study lead author Dr. Marco Todesco, a research associate in the UBC Department of Botany.



Dr. Todesco and colleagues grew nearly 2,000 individual sunflowers of two different species in a lab in 2016 and 2019. Measuring the UV patterns and examining the genome of the plants, the researchers found that sunflowers growing in different regions of North America had differently sized bullseye patterns. Bees were better able to see the larger bullseyes.&nbsp;



The experts also found that the same gene that controlled the bullseye pattern was used in the production of UV-absorbant flavonoids, which help the plants survive stresses from things like drought and high temperatures.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;



“Floral UV patterns appear therefore to play at least a dual role in adaptation; besides their well-known effect on enhancing pollination, they also regulate water loss from flowers,” said study senior author Dr. Loren Rieseberg. “That’s not something you would necessarily expect a flower color to do, and it exemplifies the complexity and efficiency of adaptation - solving two problems with a single trait.”



The scientists feel more research into this adaptation could help improve the resilience of sunflower crops in the future.&nbsp;



The research is published in the journal <a href="https://elifesciences.org/">eLife</a>.



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

"Invisible" colors in sunflowers do more than just attract bees

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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https://youtu.be/Ug657J67iEo?si=w96YjGMsg939LD_3
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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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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



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How does salt makes things taste better?

[sendtonews key="X0f6OHYoI4-2310561-12187" 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 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



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Santiago, Chile in South America

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

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

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

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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

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

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



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



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The city of Dublin on Ireland's east coast

[sendtonews key="qjvhBOBnY8-2426650-12187" 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 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



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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



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2022 illustrated the consequences of a warming climate

[sendtonews key="3UUsNkFOuS-2487333-12187" type="single"] Today's Video of the Day from NASA...

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"

[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...

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