Rare earth elements are everywhere - in your smartphone screen, in the MRI machine at the hospital, in the battery of an electric vehicle, and even in oil and gas refining. They are a key ingredient of modern life.



As global tensions rise, so does the competition for access to these minerals. Recent headlines show the stakes: China has halted rare earth exports to the United States, and a deal was just signed to secure U.S. access to Ukraine’s mineral resources.



Despite their name, rare earth elements aren’t actually scarce; what’s rare is finding them in high enough concentrations to mine economically. These deposits are scattered unevenly across the globe and often buried deep underground, shaping who controls their production and the global supply chain.



Scientists at <a href="https://www.tufts.edu/" target="_blank" rel="noreferrer noopener">Tufts University</a> are trying to better understand how and why rare earth minerals ended up where they did. Their research reveals how the movement of continents over billions of years helped form - and hide - these valuable deposits.



<h2 class="wp-block-heading" id="h-supercontinents-shaped-rare-deposits">Supercontinents shaped rare deposits</h2>



To explain how this mineral drama began, we need to go back in time. Way back. Earth's surface is always on the move. Over millions of years, massive landmasses shift, collide, and break apart, reshaping the planet in the process.



"Most of us are familiar with <a href="https://www.earth.com/earthpedia-articles/supercontinents-101-pannotia-gondwana-and-pangea/" target="_blank" rel="noreferrer noopener">Pangea</a> - the supercontinent that formed about 300 million years ago and that the current seven continents broke off from to form their present-day arrangement," said Jill VanTongeren, professor and chair of the Department of Earth and Climate Sciences.



"But Pangea is only the most recent supercontinent. Throughout Earth history, there have been at least five major <a href="https://www.earth.com/news/australia-north-america-supercontinent/" target="_blank" rel="noreferrer noopener">supercontinent</a> cycles - periods when continents all come together and then spread back out again into different pieces. We think this process happens roughly every 500 million years."



<h2 class="wp-block-heading" id="h-where-minerals-begin">Where minerals begin</h2>



As these continents drifted apart, they created rifts - places where the Earth's tectonic plates pulled away from each other. These rifting zones became birthplaces for rare earth element-rich magmas.



"As the rocks are pushed apart, they decompress, causing melting. It's kind of like taking the lid off a soda bottle, and the bubbles rise to the surface," said VanTongeren.



"Those early magmas contain the highest abundance of rare earth and other incompatible elements that then enter the crust, either erupting in volcanic centers or solidifying at depth."



Some of these mineral-rich magmas cooled and stayed near the surface. Others got dragged back down into the mantle or remain buried too deep to mine with today’s technology.



<h2 class="wp-block-heading" id="h-a-race-for-control-resources">A race for control resources</h2>



Today, the number of economically viable rare earth deposits is limited. China dominates the market, with nearly 70% of global production coming from its Bayan Obo mine. The <a href="https://www.earth.com/news/crucial-rare-earth-elements-discovered-coal-mines-united-states/" target="_blank" rel="noreferrer noopener">U.S.</a> has a smaller operation at Mountain Pass in California, and a few other countries have scattered deposits.



In the late 1990s and early 2000s, China flooded the market with rare earth minerals, driving down prices and shutting down other global producers. That move reshaped global dependence.



In response, the U.S. government took steps to re-establish a domestic supply. Recent investments from the 2021 Infrastructure and Jobs Act and the Department of Defense aim to restart full operations at the Mountain Pass mine, though it could take up to a decade.



There’s also hope that Ukraine's <a href="https://www.earth.com/news/nasa-is-on-a-mission-to-map-americas-mineral-wealth/" target="_blank" rel="noreferrer noopener">mineral deposits</a> could help diversify supply. But for now, their potential remains unclear.



"Political boundaries and the desire to obtain access to mineral resources have been the source of economic and military conflicts throughout human history," said VanTongeren. "This is likely to continue as the world shifts toward green energy and a greater dependence on rare earth elements in the future."



<h2 class="wp-block-heading" id="h-hunting-for-mineral-deposits">Hunting for mineral deposits</h2>



VanTongeren’s work tracks these mineral stories from source to surface. Her fieldwork has taken her from a ship near Antarctica to platinum mines in South Africa, Morocco’s mountains, and even a <a href="https://www.earth.com/news/huge-lithium-deposit-from-volanic-ash-found-in-pennsylvania/" target="_blank" rel="noreferrer noopener">lithium</a> discovery in Maine.



"It's a fascinating area of study partly because it lies at the intersection of science, economics, and politics," she said. Back on the Tufts campus, this intersection takes a more visual form.



<h2 class="wp-block-heading" id="h-tufts-secret-mineral-vault">Tufts' secret mineral vault</h2>



Tucked into the basement of Lane Hall, the P.T. Barnum Mineral Collection offers a glimpse into the Earth’s treasures. It includes thousands of mineral specimens, some collected by Barnum himself. He was an early supporter of Tufts and a major collector of natural history in the 1800s.



"In the late 1800s, it was considered fashionable for many prominent individuals to accumulate their own natural history collections," noted VanTongeren.



"P.T. Barnum was one of the biggest collectors of the time. His collection of animals, plants, and minerals was among the first gifts to Tufts University and part of an endowment to establish Tufts as one of the major natural history museums in the country."



After a fire destroyed the Barnum Museum in 1975, the mineral collection moved to Lane Hall. Now, it’s about to move again - this time to Bacon Hall, the new home for the Department of Earth and Climate Sciences.



<h2 class="wp-block-heading" id="h-global-hunt-for-rare-earth-elements">Global hunt for rare earth elements</h2>



VanTongeren hopes this new home will be more than just a storage site. She wants it to become a space that encourages curiosity and exploration, not just for scientists, but for everyone.



"My pie-in-the-sky vision is to set up a mineral gallery with both a permanent exhibit as well as pop-up exhibitions every semester highlighting minerals important for technology, related to other research at the university, or to global events," said VanTongeren.



"I'd like to help bring back Barnum's vision of bringing the beauty of, and an appreciation for, the natural world to campus."



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Global hunt for rare earth elements is underway

Rare earth elements are everywhere - in your smartphone screen, in the MRI machine at the hospital, in the battery of an electric vehicle, and even in oil and gas refining. They are a key ingredient of modern life. As global tensions rise, so does the competition for access to these minerals. Recent headlines show the stakes: China has halted rare earth exports to the United States, and a deal was just signed to secure U.S. access to Ukraine’s mineral resources. Despite their name, rare earth elements...

A new study led by the <a href="https://www.pik-potsdam.de/en/home">Potsdam Institute for Climate Impact Research</a> (PIK)&nbsp;has found that substituting 20 percent of meat from cattle with microbial protein (an alternative to meat produced in fermentation tanks) by 2050 could reduce <a href="https://www.earth.com/news/coordinated-efforts-needed-to-slow-deforestation/">deforestation</a> and greenhouse gas emissions by half, thus providing significant help in mitigating climate change.&nbsp;



“The food system is at the root of a third of global greenhouse gas emissions, with ruminant meat production being the single largest source,” said study lead author Florian Humpenöder, a postdoctoral researcher at PIK.&nbsp;



An increasing number of forests that store a lot of carbon are currently cleared for cattle grazing, while animal agriculture is also contributing massively to greenhouse gas emissions. This means that the use of nutritious protein-rich biomass with meat-like texture produced from microbes such as fungi during fermentation could be an important step forward in saving forests and curbing global warming.



“The substitution of ruminant meat with microbial protein in the future could considerably reduce the greenhouse gas footprint of the food system,” said Dr. Humpenöder. “The good news is that people do not need to be afraid they can eat only greens in the future. They can continue eating burgers and the like, it’s just that those burger patties will be produced in a different way.”



Dr. Humpenöder and his colleagues included microbial protein in a computer simulation model built to assess the environmental effects of the whole food and agriculture system. By running various forward-scenarios until 2050 and accounting for future population growth, food demand, dietary patterns, and land-use dynamics, the experts found that, if we substituted 20 percent of ruminant meat per capita with microbial protein, annual deforestation and carbon emissions would be halved by mid-century.&nbsp;



“The reduced numbers of cattle do not only reduce the pressure on land but also reduce methane emissions from the rumen of cattle and nitrous oxide emissions from fertilizing feed or manure management,” said Dr. Humpenöder. “So replacing minced red meat with microbial protein would be a great start to reduce the detrimental impacts of present-day beef production.”



According to the scientists, since fermentation-derived microbial protein is made in specific cultures, like beer or bread, this process could be largely decoupled from agricultural production. However, a large-scale transformation towards biotech food would also require a large-scale decarbonization of electricity generation so that its climate protection potential can be fully developed. Further research is needed to find the most efficient methods of using sustainable energy to fuel such green biotechnology initiatives.&nbsp;



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41586-022-04629-w">Nature</a>.



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

Fungi-based meat alternatives could help save forests

A new study led by the Potsdam Institute for Climate...

According to the <a href="https://www.epa.gov/">Environmental Protection Agency</a> (EPA), agriculture contributes 9.6 percent to U.S. greenhouse gas emissions, and approximately 36 percent of <a href="https://www.earth.com/news/methane-emissions-are-higher-than-previously-estimated/">methane</a> emissions, which are produced in large part by livestock. Scientists have long known that methane emissions from cattle are a significant contributor to climate change. As cows digest their foods through a process known as “enteric fermentation,” they release methane (a powerful greenhouse gas able to trap massive amounts of heat in the atmosphere), mostly through their burps.&nbsp;



Now, the environmental data firm<a href="https://www.ghgsat.com/"> GHGSat</a> has managed for the first time to measure - by using three powerful, high-resolution satellites orbiting 300 miles above the Earth - methane emissions from cow burps on a cattle feedlot in California’s Joaquin Valley. California is home to 1.4 million cows, representing the largest source of cattle-related methane emissions in the country.



Since agricultural methane emissions are generally hard to measure, and accurate measurements are necessary to set enforceable reduction targets for the beef-production industry, this groundbreaking use of satellite data is a significant step forward in controlling these harmful emissions.&nbsp;



According to Brody Wight, the sales director at GHGSat, this is first time that scientists were able to use satellite imagery to provide an accurate idea of the amount of methane emissions from cattle farming. 



“This is really pushing the envelope of our capabilities,” said Wight. “What's unique about us is we can really kind of get to the source” of such emissions, by zooming in on specific feedlots. Each satellite flew above a specific area for about 20 seconds, taking quick “snapshot” of emissions.



The measurements revealed that the amount of methane the satellites have detected from a single feedlot would result in 5,116 tons of methane emissions, if sustained for a year. If that methane were captured, it could power more than 15,000 houses. In the future, regular monitoring with such satellites could offer reliable estimates of how emissions change over time, allowing farmers to test the impact of different diets on cows’ methane emissions.



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

Satellites detect methane emission from cow burps

According to the Environmental Protection Agency (EPA), agriculture contributes 9.6...

PFAS (per- and polyfluoroalkyl substances) are a class of over 9,000 <a href="https://www.earth.com/news/chemicals-from-42000-sources-are-polluting-drinking-water-in-the-u-s/">chemicals</a> that are often added to a large variety of consumer products to make them stain-resistant, non-sticking, or waterproof. In addition to items including carpets, upholstery, or apparel, PFAS are also widely used in a variety of everyday products such as food packaging, non-stick cookware, cosmetics, or even dental floss. Now, a research team led by the <a href="https://silentspring.org/">Silent Spring Institute</a> has found that many children’s products – including those labeled “green” or “nontoxic” – also contain these harmful chemicals, exposing children to a wide range of health-related risks.&nbsp;



Many studies have linked PFAS with the risk of developing various diseases, including cancers, thyroid disorders, high cholesterol, or asthma. Moreover, there is also evidence that PFAS can suppress the immune system, thus weakening the body’s ability to ward off infections, as well as the effectiveness of vaccines, particularly in children.



“Children’s bodies are still developing and are especially sensitive to chemical exposures,” explained study co-author Dr. Laurel Schaider, a senior scientist at the Silent Spring Institute. “It makes sense that parents would want to steer clear of products that contain ingredients that could impact their children’s health now and in the future.”



Dr. Schaider and her colleagues have tested 93 different products frequently used by children and adolescents, including clothing, bedding, or furnishing. The scientists chose products that were labeled as stain- or water-resistant, as well as “green” or “nontoxic.”&nbsp;



By using a rapid screening method to test these products for fluorine – a major marker of PFAS – they found that 54 of the products contained detectable levels of this toxic chemical, with the highest concentration discovered in a school uniform shirt.



The scientists then tested a subset of products for 36 different PFAS chemicals and discovered that all products labeled stain- or water-resistant contained significant concentrations of these chemicals, regardless of whether they were also marketed as “green” or “nontoxic.” PFAS were detected most frequently in upholstered furniture, clothing, and pillow protectors.



“These are products that children come into close contact with every day and over a long period of time. Given the toxicity of PFAS and the fact that the chemicals don’t serve a critical function, they should not be allowed in products,” said study co-author Kathryn Rodgers, a doctoral student at the <a href="https://www.bu.edu/sph/">Boston University School of Public Health</a>.



These findings highlight the need for green certifiers (third party organizations assessing whether products contain harmful substances) to include PFAS in their criteria and to conduct more thorough reviews of the products they certify.



The study is published in the journal <a href="https://dx.doi.org/10.1021/acs.est.1c05175">Environmental Science &amp; Technology</a>.



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

Many children’s products contain harmful chemicals

PFAS (per- and polyfluoroalkyl substances) are a class of over...

Protecting native tree diversity through more efficient conservation and restoration efforts is crucial in Southeast Asia, where an increasing number of <a href="https://www.earth.com/news/thousands-of-tree-species-remain-undiscovered/">tree species</a> face threats from habitat loss, climate change, wildfires, and other human-caused factors. A new study published in the journal <a href="http://dx.doi.org/10.1016/j.biocon.2022.109560">Biological Conservation</a> has used a spatially explicit framework to identify species-specific priority areas for conservation and restoration of endangered rosewood species in the Greater Mekong Subregion - an area including Cambodia, China, Laos, Myanmar, Thailand, and Vietnam.



The researchers focused on three highly valuable Asian Rosewood (Dalbergia spp.) species – Siamese rosewood, Burma blackwood, and Burmese rosewood – and found that all of these species faced significant risk to at least one of five threats across 75 percent of their native ranges: overexploitation, overgrazing, fires, habitat conversion, and climate change. The continuous decline in genetic diversity reduces these trees’ capacity to adapt and survive in a rapidly changing environment, narrowing the window of opportunity to restore productive populations that are highly fragmented due to human activity.



According to United Nations data, rosewoods are the most lucrative form of illegal flora trade, surpassing ivory in terms of trade value. The risks they face from illegal logging and deforestation for agricultural expansion are compounded by other anthropogenic threats, such as climate change and forest fires.&nbsp;



In order to provide an overview of the diversity of environments where these species grow and to assess current gaps for conservation measures, researchers made use of a spatial framework that could complement field studies. “Spatial approaches serve as a complementary method to field studies by helping narrow down target areas for follow-up surveys and benefitting tropical regions where there is high species diversity and where conservation resources are limited,” explained study co-author Riina Jalonena, a researcher at the <a href="https://www.bioversityinternational.org/alliance/">Alliance of Bioversity International and CIAT</a>.&nbsp;



The analysis revealed that all three species of rosewood were at risk across the Greater Mekong, particularly from overexploitation, habitat conversion, and fires. Unfortunately, only a fraction of the rosewood population is found in protected areas, while the rest of the population is dwindling is areas that are not regulated by governmental bodies. However, even the species from protected areas are not guaranteed survival due to limited access and rapid environmental changes.&nbsp;



Urgent conservation and restoration actions are needed to save these highly valuable and threatened tree species. The scientists hope that, through regional initiatives guided by the action maps they provided, it will be possible to mobilize cross-country collaborations to safeguard these important resources and the ecosystems they are a crucial part of. &nbsp;&nbsp;&nbsp; &nbsp;



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

Rosewood trees in Southeast Asia face the risk of extinction

Protecting native tree diversity through more efficient conservation and restoration...

Alaska during the Cretaceous Period was a different place from the state that exists today. Alaska was warmer and wetter, and supported an array of different plant species, as well as an abundance of large, herbivorous dinosaurs. During the late Cretaceous, large-bodied (&gt;1000 kg) herbivorous dinosaurs in the Arctic were predominantly from the groups known as hadrosaurids (duck-billed dinosaurs) and ceratopsids (horned dinosaurs), and their fossilized remains have been found at numerous sites in the region.



In order to understand more about the relationship between the biota and the <a href="https://www.earth.com/news/assisted-migrations-could-help-species-survive-climate-change/">climate</a> in the ancient Arctic between 100 and 66 million years ago, scientists from the USA and Japan have investigated the distribution of these megaherbivores in Alaska. The authors feel that this study might help them predict what the Arctic region might look like in the years ahead, if the climate continues to become warmer and wetter.&nbsp;



Study co-author Paul McCarthy, a professor in the <a href="https://www.uaf.edu/">UAF</a> Department of Geosciences, is a sedimentologist and a fossil soils specialist who has been studying the region’s ancient past for many years.&nbsp;



“The reason we've been looking at Cretaceous environments up here is because Earth was in a greenhouse state at that point in time, and it offers the potential to provide analogs to what we might see, eventually, if global warming continues,” said Professor McCarthy.



“We can't simulate the rates of change, which are likely to have been totally different in the Cretaceous. But we can simulate what an ice-free coast would look like and also see how rivers and floodplains would respond to spring snowmelt from the mountains if everything's not frozen. And we can look at the distribution of plants and animals.”



Professor McCarthy led the analysis of the depositional environments and ancient soils of three rock formations: the fossil-rich Prince Creek Formation along the Colville River in northern Alaska, the Lower Cantwell Formation in the Central Alaska Range and the Chignik Formation on the Alaskan Peninsula.



The three formations are close enough to one another on the geologic time scale to allow for a climate comparison, according to the research paper. They all contain Late Cretaceous rocks that were deposited approximately 83 million to 66 million years ago.



In particular, the researchers estimated mean annual temperature (MAT) and mean annual precipitation (MAP) for each site using characteristics found in the fossilized soils. These geochemical and pollen proxies enabled them to get a better picture of climatic conditions that prevailed during this time period. Fossilized plants and animals and ancient footprints get most of the public attention, but fossil soil has equally important information to offer through its preserved features, mineral composition and chemical makeup.



“We can look at microscopic features preserved in the fossil soil samples and relate that to modern soil types to get an idea of where they formed,” said Professor McCarthy. “Are we looking at deserts? Are we looking at tropical rainforest or temperate forest? Or grasslands?”&nbsp;



“Fossil soil also preserves pollen grains that can tell us something about the composition of the local vegetation. And it contains clay minerals, organic matter and the iron-carbonate mineral siderite, all of which can be used to determine precipitation and temperature using stable isotopic methods.”



The researchers estimated the relative abundances of dinosaurs at each site using the occurrences of fossilized tracks, as well as the frequency with which each type of dinosaur dominated in the fossil skeletal deposits.&nbsp;



The findings of the study, published recently in the journal <a href="https://www.mdpi.com/journal/geosciences">Geosciences</a>, showed that dinosaur distribution in Alaska was correlated more strongly with the amount of annual precipitation than with the mean annual temperatures. Hadrosaurids, the family of duck-billed dinosaurs, became more dominant where climates were wetter and had a narrower annual temperature range. In contrast, ceratopsids, such as the well-known Triceratops, preferred a milder and drier climate.



At the three Alaskan sites studied, the ceratopsids, with their beaks and horns, were never dominant over the hadrosaurids in terms of population numbers.



The finding that precipitation has a greater influence on dinosaur distribution than temperature supported prior research from the Prince Creek Formation. That research, led by Celina A. Suarez of the University of Arkansas, suggested that ceratopsids preferred the drier, better-drained regions of the Late Cretaceous Arctic while the hadrosaurids preferred the wetter regions. Professor McCarthy was also involved in the study, which was focused on dinosaur teeth.&nbsp;



Previous research has also found that variations in population sizes of large herbivores are related more to variations in precipitation than to variations in temperature. Precipitation has its effect on vegetation and the productivity of ecosystems, and these large-bodied megaherbivores would have depended on sufficient supplies of fresh food.&nbsp;



The authors conclude that the&nbsp;formations studied “provide ample evidence for a flourishing high-latitude ecosystem during the Late Cretaceous greenhouse, an ecosystem where the local paleoclimate was a primary driver in structuring the relative abundances of large-bodied herbivores in local environments. The analysis suggests that MAP played a more direct role in determining the distribution of dinosaurs than did MAT, although seasonal temperature ranges between summer and winter may have also played a secondary role.”



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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

In Alaska, dinosaurs lived where rainfall was optimal

Alaska during the Cretaceous Period was a different place from...

A new study has revealed that children who eat vegetarian <a href="https://www.earth.com/news/plant-based-diets-reduce-the-risk-of-severe-covid-19/">diets</a> have similar measures of growth and nutrition compared to children who eat meat. The study, led by researchers at <a href="https://unityhealth.to/locations/st-michaels-hospital/">St. Michael’s Hospital of Unity Health</a>, also found that children with a vegetarian diet were more likely to be underweight, emphasizing the need for careful planning of childhood nutrition.



The findings come as uptake of plant-based diets is on the rise in Canada. In 2019, updates to <a href="https://food-guide.canada.ca/en/guidelines/">Canada’s Food Guide</a> promoted plant-based proteins, such as beans and tofu, instead of meat.



“Over the last 20 years we have seen growing popularity of plant-based diets and a changing food environment with more access to plant-based alternatives, however we have not seen research into the nutritional outcomes of children following vegetarian diets in Canada,” said Dr. Jonathon Maguire, lead author of the study.



“This study demonstrates that Canadian children following vegetarian diets had similar growth and biochemical measures of nutrition compared to children consuming non-vegetarian diets. Vegetarian diet was associated with higher odds of underweight weight status, underscoring the need for careful dietary planning for children with underweight when considering vegetarian diets.”



The researchers evaluated roughly 9,000 children as young as six months old who participated in the <a href="https://www.targetkids.ca/">TARGet Kids!</a> cohort study. The quality of the vegetarian diet was not considered in the assessment.&nbsp;



The experts found that children who ate a vegetarian diet had similar mean body mass index (BMI), height, iron, vitamin D, and cholesterol levels compared to those who consumed meat. Among vegetarian participants, there were increased odds of being underweight, below the third percentile for BMI, and no association of obesity.&nbsp;



Underweight is an indicator of undernutrition, which can happen when the quality of a child’s diet is not meeting nutritional needs to support growth. For children who eat a vegetarian diet, access to healthcare providers is key to ensuring that growth is monitored and children receive education and guidance to support their growth and nutrition.



International guidelines have differing recommendations when it comes to childhood vegetarian diets. Past studies that have evaluated vegetarian diet, childhood growth and nutritional status have had conflicting findings.



“Plant-based dietary patterns are recognized as a healthy eating pattern due to increased intake of fruits, vegetables, fiber, whole grains, and reduced saturated fat; however, few studies have evaluated the impact of vegetarian diets on childhood growth and nutritional status. Vegetarian diets appear to be appropriate for most children,” said Dr. Maguire, who is also a scientist at MAP Centre for Urban Health Solutions at St. Michael’s Hospital.



The researchers believe that further research is needed to understand the quality of vegetarian diets in childhood, and to understand how childhood growth and nutrition is further impacted by a vegan diet, which excludes meat and animal derived products such as dairy, egg, and honey.



The study was published in the journal <a href="https://publications.aap.org/pediatrics">Pediatrics</a> &nbsp;and was funded by the Canadian Institutes of Health Research (CIHR), St. Michael’s Hospital Foundation and SickKids Foundation.



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Children with vegetarian diets maintain similar growth and nutrition

A new study has revealed that children who eat vegetarian...

Experts at <a href="https://www.cornell.edu/">Cornell University</a> have discovered that when coronavirus jumps from <a href="https://www.earth.com/news/jack-russell-terriers-live-the-longest-lives-of-uk-dogs/">dogs</a> to humans, the virus goes through a transition. The researchers have identified a change that occurs in the spike protein during the transfer of canine coronavirus to humans. The research may provide new insight into how coronavirus is transmitted from animals to humans.



"The ongoing coronavirus (CoV) disease (COVID-19) is the third documented animal to human CoV spillover to have resulted in a major epidemic," noted the researchers.



In 2017, a new canine coronavirus was first identified in a human - a Malaysian patient who developed pneumonia. In 2021, a team of experts isolated and sequenced the canine coronavirus.



Now, in collaboration with researchers at Temple University, the Cornell team has identified a pattern that occurs in a terminus of the canine coronavirus spike protein, which is the part of the virus that allows it to gain entry into cells. 



The experts found that the virus shifts from infecting both the intestines and respiratory system of the animal to infecting only the respiratory system in a human.



“This study identifies some of the molecular mechanisms underlying a host shift from dog coronavirus to a new human host, that may also be important in the circulation of a new human coronavirus that we previously didn’t know about,” said study co-author Professor Michael Stanhope.



For the analysis, the researchers used state-of-the-art molecular evolution tools to investigate how pressures from natural selection may have influenced the evolution of the canine coronavirus.



The same canine coronavirus variant found in Malaysia was also reported in a few patients in Haiti in 2021.



Stanhope believes that further research is needed to understand if the viral shifts and jumps to humans occurred spontaneously in different parts of the world or if this coronavirus has been circulating for perhaps many decades in the human population without detection.



The study is published in the journal <a href="https://www.mdpi.com/journal/viruses">Viruses</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

Canine coronavirus behaves differently in humans

Experts at Cornell University have discovered that when coronavirus jumps...

Orange,Butterfly,On,Orange,Cosmos,Flowers

Experts at the <a href="https://www.pitt.edu/">University of Pittsburgh</a> are developing a system to track the migrations of monarch butterflies. Each fall, millions of monarchs migrate to a specific region of mountains in central Mexico. The researchers plan to investigate how the butterflies navigate, and how climate change may alter the path that they take. 



Professor Inhee Lee is part of a team that has created a tiny sensor that can be carried by monarch butterflies along their journey. The sensor will transmit data throughout the three-month migration.&nbsp;



“Tracking animal migration is a critical ecosystem indicator,” said Professor Lee. “Migrators travel long distances across entire continents, and it can give us unprecedented insight into their migratory paths, how the environment around them is changing, and how species interactions are impacted by changing movements and distributions.”



The tiny chip is part of a new wireless sensing platform called mSAIL. The sensor, which will be attached to the butterfly’s back, can simultaneously measure light intensity and temperature. Using a machine learning method, the experts will be able to use data from the chip to reconstruct the butterfly’s migration route.



"The proposed system is designed to record and compress light and temperature data during the migration path while harvesting solar energy for energy autonomy, and wirelessly transmit the data at the overwintering site in Mexico, from which the daily location of the butterfly can be estimated using a deep learning-based localization algorithm," wrote the researchers.



The sensor was tested on a monarch butterfly in a botanical garden. The test revealed that the chip did not impede the monarch's ability to fly or open and close its wings.&nbsp;



According to the experts, the next step of the project is to mass produce over 100 mSAIL sensors that can reliably operate over the three-month migration. The researchers plan to tag butterflies at various locations in the United States.



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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

Tiny sensor will track monarchs on their long migratory journey

Experts at the University of Pittsburgh are developing a system...

<a href="https://www.earth.com/news/seagrass-is-a-powerful-weapon-in-the-fight-against-climate-change/">Seagrasses</a> are some of the most efficient carbon sinks on Earth: one square kilometer can store nearly twice as much carbon as forests on land, and 35 times as fast. Now, a research team led by the <a href="https://www.mpi-bremen.de/en/Home.html">Max Planck Institute for Marine Microbiology</a> in Germany has found that seagrasses also release massive amounts of sugars into their soils (the so-called “rhizosphere”), during the process of photosynthesis.&nbsp;



While under average light conditions, the plants use most of the sugars for their own metabolism and growth, under high light conditions, such as at midday or during the summer, they produce much more than they can use, releasing the surplus into their rhizosphere.&nbsp;



“To put this into perspective: We estimate that worldwide there are between 0.6 and 1.3 million tons of sugar, mainly in the form of sucrose, in the seagrass rhizosphere,” said study senior author Manuel Liebeke, the head of the Metabolic Interactions group at the Max Planck Institute. “That is roughly comparable to the amount of sugar in 32 billion cans of coke!”



Knowing that almost all microbes thrive on sugars, Dr. Liebeke and his colleagues have pondered why is the sucrose not consumed by the vast population of microorganisms from the seagrass rhizosphere.&nbsp;



“We spent a long time trying to figure this out,” said study first author Maggie Sogin, who conducted the study during a postdoctoral fellowship at Max Planck.



“What we realized is that seagrass, like many other plants, release phenolic compounds to their sediments. Red wine, coffee and fruits are full of phenolics, and many people take them as health supplements. What is less well known is that phenolics are antimicrobials and inhibit the metabolism of most microorganisms.”&nbsp;



However, a small set of microbes seem to be able to thrive on sucrose. According to Dr. Sogin, these creatures are not only able to digest sucrose and degrade phenolics, but might also produce essential nutrients, such as nitrogen, which help seagrass grow. “Such beneficial relationships between plants and rhizosphere microorganisms are well known in land plants, but we are only just beginning to understand the intimate and intricate interactions of seagrasses with microorganisms in the marine rhizosphere,” she said.



Since seagrass meadows are among the most threatened habitats on the planet and are rapidly declining in all oceans, scientists worldwide fear that their disappearance will release massive amounts of carbon into the atmosphere, thus exacerbating global warming.&nbsp;



“Looking at how much blue carbon – that is carbon captured by the world's ocean and coastal ecosystems – is lost when seagrass communities are decimated, our research clearly shows: it is not only the seagrass itself, but also the large amounts of sucrose underneath live seagrasses that would result in a loss of stored carbon. Our calculations show that if the sucrose in the seagrass rhizosphere was degraded by microbes, at least 1,54 million tons of carbon dioxide would be released into the atmosphere worldwide,” concluded Professor Liebeke.&nbsp;



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

Massive amounts of sugar found under seagrass meadows

Seagrasses are some of the most efficient carbon sinks on...

A new study published in the journal <a href="http://pnas.org/doi/full/10.1073/pnas.2115231119A">Proceedings of the National Academy of Sciences</a> has investigated a period of rapid global warming from 300 to 260 million years ago, when the Earth’s <a href="https://www.earth.com/news/climate-change-is-accelerating-the-water-cycle/">climate</a> went from a glacial icehouse to a hot, ice-free greenhouse. According to the scientists, within about 300,000 years, atmospheric carbon dioxide levels doubled, oceans became anoxic, and biodiversity dropped significantly both on land and in the seas.



Although several other hyperthermal or rapid warming events are known in our planet’s history, this appeared to be one of the fastest ones. Moreover, it was the first such event identified in an icehouse Earth, when the planet had a variety of ice caps and glaciers, comparable to today’s situation. Experts argue that an icehouse climate may be more sensitive to changes in atmospheric carbon dioxide levels than warmer conditions, when the levels of this gas are already higher.



In this study, the scientists homed in on a transition 304 million years ago, known as the Kasimovian-Gzhelian boundary, or KGB. By using multiple proxies, such as carbon isotopes and trace elements from rocks and plant fossils, they estimated that about 9,000 gigatons of carbon were released in the Earth’s atmosphere just before the K-G boundary.



This period of massive carbon release also led to marine anoxia, or a drop in the levels of dissolved oxygen in the oceans. Since melting ice caps release fresh water onto the ocean surface, they create a barrier to deep water circulation and cut off the supply of oxygen, leading to the extinction of many marine species. By measuring uranium isotopes in carbonate rocks from present-day China, the scientists managed to get a proxy for the amount of oxygen in the ocean when the rocks were laid down. They estimate that 23 percent of the seafloor worldwide became anoxic <a href="https://www.earth.com/news/red-tides-and-dead-zones-threaten-floridas-west-coast/">dead zones</a>, leading to high losses of biodiversity.&nbsp;



According to study co-author Isabel Montañez, a paleoclimatologist at the <a href="https://www.ucdavis.edu/">University of California, Davis</a>, the effects of carbon release on ocean anoxia were significantly greater than those observed in other studies of rapid warming during “greenhouse” conditions, in which the baseline level of atmospheric carbon dioxide was already higher. “If you raised CO2&nbsp;by the same amount in a greenhouse world, there isn’t much effect, but icehouses seem to be much more sensitive to change and marine anoxia,” Professor Montañez said.



The researchers concluded that this massive carbon release may have been triggered by volcanic eruptions that tore through carboniferous coal beds and started a large number of wildfires. The rapid warming caused by these events may have melted permafrost, leading to the release of even more organic carbon in the atmosphere.



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

Earth endured rapid global warming 300 million years ago

A new study published in the journal Proceedings of the...

In a new study from <a href="https://www.ucsc.edu/">UC Santa Cruz</a>, scientists are urgently trying to provide guidance for helping the <a href="https://www.earth.com/news/some-plants-thrive-under-environmental-stress/">plants</a> and animals that are most threatened by climate change. The experts reviewed previous research and determined that many species will need assisted migration, or a direct intervention by humans to move threatened species into areas where they could have a better chance of survival in the future.&nbsp;



“There is an enormous need to think ahead and be proactive, as well as a growing recognition that we have to act now,” said study senior author Professor Erika Zavaleta.



“Climate change is causing a mismatch between where species are now and where the habitat and conditions suitable for them are moving. We need to think about where suitable habitats for different ecological communities will be in the future, and how they can get there.”



Climate change has occurred on the planet before, but the current rate of change - which is associated with the burning of fossil fuels - is much faster than historical climate shifts. Furthermore, humans have fragmented natural habitats to the point that it is much more difficult for species to move to suitable areas.&nbsp;



“The need to move is greater while the ability to move is less,” said Professor Zavaleta. “Things are changing, and we need to assist the adaptive responses of the natural world if we don’t want to lose both the species and the amenities they provide for people. We depend on natural ecosystems, and helping them adapt is not separate from helping people and communities adapt to climate change.”



According to the researchers, current recommendations have gone beyond conceptual guidance to provide more specific and actionable ideas about strategies to implement for particular ecosystems or species. “There has been a lot more on-the-ground implementation of some of these approaches,” said Professor Zavaleta.



Conservation measures remain critically important in the context of climate change, but the researchers noted that three novel strategies have received growing attention in recent years: climate change refugia, assisted migration, and protecting climate-adaptive genetics.



“If you think of a valley oak, with acorns that are carried only a short distance by birds and are only viable in the year they are dropped, you can have connectivity but the trees are not going to move at the same pace as the drying that’s happening in parts of their range,” explained Professor Zavaleta. “So do we watch their range contract and disappear? Or do we bank them as seedlings in botanical gardens? And what do we need to be learning now about how to put them back out into the landscape where they can survive?”



Climate change refugia includes habitat restoration, such as restoring woodland streams. Assisted migration involves directly intervening to move species to more suitable areas and moving individuals between populations to preserve genetic diversity.&nbsp;



“I feel like the devil is in the details, but I also think translocation has been mischaracterized as an untested strategy, when actually it has been practiced for over a century and probably longer,” said Professor Zavaleta. “Forestry, for example, has a long practice of planting trees from a wide range of locations in areas that are being restored. But we do have a lot more to learn, especially for certain animals and species that are not well understood.”



In particular, the researchers want to protect the genetic variants that might be better adapted to hotter, drier conditions. “These are the very conditions that we are likely to see more of in the future,” said study co-author Professor Blair McLaughlin. “Preserving the climate-adaptive evolutionary potential of a species before it’s lost is critical to make sure we have the genetic resources we need to help species adapt to novel climate futures.”



The study is published in the journal <a href="https://www.journals.elsevier.com/biological-conservation">Biological Conservation</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

Assisted migrations could help species survive climate change

In a new study from UC Santa Cruz, scientists are...

Oyster fisheries around the world have suffered collapses over the past 200 years that have been attributed to overexploitation, climatic changes, disease and the introduction of alien species. This is particularly noticeable in countries where colonizers arrived and commercialized the harvest of this shellfish on a large scale. In the process, Indigenous peoples who had used the resource for hundreds, or even thousands of years previously, were displaced and marginalized. Today, as much as 85 percent of the 19th century oyster <a href="https://www.earth.com/news/experts-map-coral-reefs-before-and-after-marine-heat-wave/">reefs</a> have been lost and oyster fisheries have declined globally.&nbsp;



Research into oyster fisheries has often focused on the years subsequent to the arrival of colonizers, and the data has been used to inform management practices, while the earlier use of the resource by Indigenous peoples has largely been overlooked or ignored. And yet these people depended upon oysters as part of their diet and economy, in addition to using them in social, ritual and cultural traditions. They were deeply connected to the coastal ecosystem and had indigenous knowledge derived from the historical use of the resource.



In a new, global study of Indigenous oyster fisheries, published today in the journal <a href="https://www.nature.com/articles/s41467-022-29818-z">Nature Communications</a>, scientists have excavated the remains of shell middens in areas of eastern Australia, the Pacific Coast of North America, and the Atlantic and Gulf of Mexico coast of North America, in order to expand on knowledge about oyster harvesting prior to the arrival of colonial populations. The study was co-led by&nbsp;anthropologist&nbsp;<a href="https://naturalhistory.si.edu/staff/torben-rick">Torben Rick</a> of the&nbsp;<a href="https://naturalhistory.si.edu/">Smithsonian’s National Museum of Natural History</a>, and Temple University anthropologist and former Smithsonian postdoctoral fellow Leslie Reeder-Myers.



“Oyster harvesting didn’t start 500 years ago with the arrival of Europeans,” said study co-author Bonnie Newsom, an anthropologist at the University of Maine and citizen of the Penobscot Indian Nation. “Indigenous peoples had a relationship with and understood this species well enough to use it as part of their subsistence and cultural practices. Indigenous peoples have a lot to offer in terms of how to engage with this natural resource in ways that are sustainable.”



According to Rick, the new research expands on a seminal&nbsp;<a href="https://doi.org/10.1073/pnas.0405150101">2004 paper</a>&nbsp;that documented the collapses of 28 oyster fisheries located along the east and west coasts of North America and Australia’s east coast. But the 2004 paper’s timeline in each location begins with European colonists’ creation of commercial oyster fisheries. In the current study, the aim was to deepen the historical background of those modern declines by documenting the Indigenous oyster fisheries at the same locations as considered in the 2004 paper.&nbsp;



But the authors also aimed to highlight that Indigenous communities should be included in future management decisions pertaining to these resources since they have a valuable input to make.&nbsp;



“Conservation today can’t just be seen as a biological question and can’t just be about undoing the environmental damage we’ve done in the modern era,” Rick said. “Instead, global conservation efforts should be coupled with undoing the legacies of colonialism which brought about the attempted erasure and displacement of Indigenous people all over the world.”



Rick, Reeder-Myers and 24 other researchers used information from shell middens at the sites studied in the 2004 paper. The team used data from previously published papers, unpublished records and their own research in order to quantify the numbers of oysters disposed of by indigenous peoples at these archeological sites. Some middens were small and perhaps only used seasonally, while others were massive and towered up to 30 feet in height.



The findings of the research show that oyster fisheries were hugely productive over a timescale of hundreds and even thousands of years, during which the shellfish were intensively harvested. Long before European colonizers arrived, the Indigenous groups in these locations harvested and ate immense quantities of oysters in a manner that appeared to be sustainable, as the availability of oysters did not appear to diminish over time.&nbsp;



In North America, the highest midden came from an Island called Mound Key in Estero Bay on Florida’s Gulf Coast – it contained shells of an estimated 18.6 billion oysters harvested by the region’s Calusa tribe. About 200 miles north, in Cedar Key, Florida, a site known simply as Shell Mound features the remains of an estimated 2.1 billion oysters. On the Atlantic coast of the United States, the midden at South Carolina’s Fig Island boasts just under 75.6 million oysters, and a number of sites in Chesapeake Bay total around 84 million of these shellfish. In Australia, Saint Helena Island near Brisbane is estimated to contain roughly 50 million oyster shells harvested by Indigenous peoples over more than 1,000 years.



“We knew there were big sites in the southern U.S., but when we started to calculate just how many oysters were in these sites we were astonished,” Rick said.



Dating the shells at various middens revealed that the oldest oyster remains, found in California and Massachusetts, were harvested more than 6,000 years ago. The longest-utilized single sites (though not necessarily with perfect continuity) span some 5,000 years.&nbsp;



In addition, the researchers measured the lengths of oyster shells dating back in history to find out whether smaller individuals became more common in younger deposits. According to Rick, if the oyster populations were harvested faster than they could recover, smaller individuals would have characterized more recent deposits. But the scientists found no evidence of decreasing shell size, suggesting that the populations were generally healthy and were not overexploited, despite the enormous numbers of individuals harvested.



The information from these ancient, sustainable fisheries offers insights to help restore and manage estuaries today, say the authors. They note that the findings show that Indigenous peoples in these locations had deep connections to oysters and that their living descendants are long overdue to be involved in decisions about how to manage what is left of this precious coastal resource



“The fact that there are so many oysters at archeological sites in so many different regions is an important lesson,” said Reeder-Myers. “These systems have a ton of potential and huge quantities of oysters can be sustainably harvested over long time periods if the ecosystem is healthy.”



Rick said he hopes that their findings are heeded by biologists and environmental managers and heighten public awareness about the deep connections of Indigenous peoples to coastal ecosystems around the world.



“What this study does is it says we need to start a broader dialogue when we look to restore an ecosystem or make conservation decisions,” Rick said. “In this case, that dialogue needs to include the Indigenous peoples whose ancestors stewarded these ecosystems for millennia. This broadening of perspectives can enhance biological conservation and help restore connections between Indigenous peoples and their ancestral homelands.”



Image Credit: Torben Rick



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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

Indigenous people harvested oysters sustainably for thousands of years

Oyster fisheries around the world have suffered collapses over the...

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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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

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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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Remote sensing will revolutionize the way we monitor trees

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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

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



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



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



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



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



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



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



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



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



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



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

The rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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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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