The presence of algal toxins in bowhead whales, a key food source for Native Alaskan communities, points to a disturbing shift in the Arctic. As the Arctic Ocean warms, harmful algae are spreading and moving up the food chain.



A new study confirms what many in northern Alaska have long suspected: the marine life they depend on is changing in ways that threaten their health and food security.



<h2 class="wp-block-heading" id="h-toxic-threat-to-arctic-communities">Toxic threat to Arctic communities </h2>



Researchers from the <a href="https://www.whoi.edu/" target="_blank" rel="noreferrer noopener">Woods Hole Oceanographic Institution</a> were part of a major, multi-institutional study on algal toxins in Arctic ecosystems. 



The findings suggest that warming waters create ideal conditions for these toxins to spread. This threatens the <a href="https://www.earth.com/news/giant-clams-have-vanished-from-places-where-they-used-to-thrive/">clams</a>, fish, whales, and other sea life that many subsistence-based communities depend on.



“These are new risks that were previously unknown,” said Kathi Lefebvre, a research scientist at NOAA Fisheries’ Northwest Fisheries Science Center, and lead author of the study. 



“The people in remote communities in northern and western Alaska rely on marine resources for nutritional and cultural well-being. Now we’re finding that these resources are at risk.”



<h2 class="wp-block-heading" id="h-recognizing-the-effects-of-warming">Recognizing the effects of warming</h2>



Many Native Alaskan communities - some of the most remote in the state - have been noticing these shifts for years.



Raphaela Stimmelmayr, a wildlife veterinarian with the North Slope Borough in Barrow, Alaska, is a co-author on the study.



“Native communities know intimately the ecosystems they rely on and were among the first to recognize the effects of warming,” said Stimmelmayr. 



“It is very difficult to walk away from resources that they need and have relied on since time immemorial."



Stimmelmayr emphasized the need for real-time field tests that can detect toxins in traditional foods before they are consumed. 



Monitoring equipment and fast diagnostics would allow local communities to make informed choices about what’s safe to eat.



<h2 class="wp-block-heading" id="h-the-life-cycle-of-arctic-algae">The life cycle of Arctic algae</h2>



Scientists at Woods Hole Oceanographic Institution, including Don Anderson, Bob Pickart, and graduate student Evie Fachon, have been tracking the movement and life cycle of the Arctic <a href="https://www.earth.com/news/green-algae-in-lake-erie-may-be-hiding-toxic-deadly-compounds/">algae</a> responsible for the rising toxic threat.



Their work sheds light on how <a href="https://www.earth.com/news/fish-foraging-behavior-changing-climate-warming-waters/">warming waters</a> are unlocking new threats from their hiding places in Arctic seafloor sediments.



“I have shifted a significant portion of my lab’s research focus to the Alaskan Arctic in recent years,” said Anderson. “It is a new frontier in HAB (harmful algal bloom) research, given the rapid warming of waters in the region and the massive scale of the <a href="https://hab.whoi.edu/species/species-by-name/alexandrium/" target="_blank" rel="noreferrer noopener">Alexandrium</a> populations we have documented.”



These populations, specifically the <a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/dinoflagellate" target="_blank" rel="noreferrer noopener">dinoflagellate</a> Alexandrium, are known to produce potent neurotoxins. 



<h2 class="wp-block-heading" id="h-algae-in-the-alaskan-arctic">Algae in the Alaskan Arctic</h2>



The problem is twofold: some blooms arrive from the south, drifting north with <a href="https://www.earth.com/news/nasa-satellite-is-rewriting-what-we-know-about-ocean-currents/">ocean currents</a>, while others form locally when dormant cysts on the seafloor begin to germinate. That’s where the warming comes in.



“For years, these cysts have remained inactive, essentially preserved by the cold,” Anderson explained. “But as bottom water temperatures periodically warm, we see conditions that allow germination, and that changes the risk landscape dramatically.”



His team found that the world’s largest beds of Alexandrium cysts lie in sediments across the Alaskan Arctic. These build up when blooms from the Bering Sea drift north and settle in places like the Chukchi Sea. 



For years, the icy seafloor kept them dormant. Now, rising temperatures are allowing them to activate and grow.



This local germination is creating a second, homegrown source of toxic algal blooms - intensifying the threat already posed by southern blooms. That dual pressure is putting more strain on marine life and the communities that depend on it.



<h2 class="wp-block-heading" id="h-entire-systems-are-shifting">Entire systems are shifting</h2>



Bob Pickart and his former postdoctoral researcher Peigen Lin studied how ocean circulation and water temperature are contributing to the problem of toxic Arctic algae. Their work shows a clear link between <a href="https://www.earth.com/news/ocean-temperatures-are-rising-faster-than-expected-and-likely-to-accelerate/">rising temperatures</a> and the presence of toxins in <a href="https://www.earth.com/news/bowhead-whales-have-changed-their-migration-patterns/">bowhead whales</a>.



“My Arctic research has become increasingly interdisciplinary over the years, including exploring the role of circulation patterns, atmospheric forcing, and water properties in HAB dynamics,” Pickart said.



In other words, this isn’t just about one algae or one animal. It’s about how entire systems - currents, climate, and biology - are shifting, with real-world consequences for the people living closest to the ocean.



<h2 class="wp-block-heading" id="h-fighting-arctic-algae-with-science">Fighting Arctic algae with science</h2>



Experts at the Woods Hole Oceanographic Institution aren't just observing these changes. They are actively involved in finding solutions. 



Don Anderson also leads the U.S. National Office for <a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/dinoflagellate" target="_blank" rel="noreferrer noopener">Harmful Algal Blooms</a>, which helps coordinate national strategies and responses to HABs. That includes research efforts, outreach, and communication with coastal communities across the country.



This isn’t a challenge with a quick fix. But with scientific insight and direct collaboration with Native Alaskan communities, there’s a growing push to better monitor, understand, and manage the risks of algal toxins in a warming Arctic.



The message is clear: warming oceans aren't a future threat - they are already unleashing toxic risks in the Arctic that are reshaping what coastal populations can safely eat.



The full study was published in the journal <a href="https://www.nature.com/articles/s41586-025-09230-5">Nature</a>.



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Whales reveal a toxic threat to Arctic food webs

The presence of algal toxins in bowhead whales, a key food source for Native Alaskan communities, points to a disturbing shift in the Arctic. As the Arctic Ocean warms, harmful algae are spreading and moving up the food chain. A new study confirms what many in northern Alaska have long suspected: the marine life they depend on is changing in ways that threaten their health and food security. Toxic threat to Arctic communities Researchers from the Woods Hole Oceanographic Institution were part of a major, multi-institutional study...

<a href="https://www.earth.com/news/study-reveals-link-between-air-pollution-and-obesity/">Air pollution</a> is known to be a major public health issue, and is associated with cardio-respiratory disease incidence, hospitalizations and deaths. However, most of the previous studies have focused on adults. It is possible that adolescents, with their rapid growth rates, may be even more susceptible to the long-term effects of air pollution, but few studies involving teens have been conducted.&nbsp;



In a new study led by <a href="https://www.kcl.ac.uk/">King’s College London</a>, researchers have investigated the associations between the blood pressure of 3,284 adolescents living in London, and the levels of nitrogen dioxide (NO2) and particulate matter (PM2.5) in the air where they live. The data were collected as part of the Determinants of Adolescent Social Well-Being and Health (DASH) study, which tracks the well-being of thousands of ethnically diverse London schoolchildren over time.&nbsp;



The participants came from 51 different secondary schools in London, and were mostly (80 percent) from ethnic minority backgrounds. The students were recruited during the periods 2003–2004 and 2005–2006, when their blood pressure, height, and weight were measured.



Each participant completed a questionnaire that included details on ethnicity, residential area and socio-economic status. Levels of NO2 and particulate matter were derived from annual models of pollution levels in London for the relevant time periods. The results of the study are published in the journal <a href="http://dx.doi.org/10.1371/journal.pone.0279719">PLOS ONE</a>.&nbsp;



The analysis showed a link between greater estimated exposure to NO2 and lower systolic blood pressure in the adolescent participants. In addition, the researchers found that increased estimated exposure to PM2.5 was associated with higher systolic blood pressure. No evidence of a relationship was observed between diastolic blood pressure and levels of NO2 or PM2.5.These associations were stronger in girls than in boys.



For example, a 1μg/m3 increase in nitrogen dioxide was associated with a 0.30 mmHg (95% CI 0.18 to 0.40) decrease in systolic blood pressure for girls and a 0.19 mmHg (95% CI 0.07 to 0.31) decrease in systolic blood pressure for boys. Meanwhile, a 1μg/m3 increase in PM2.5 was associated with a 1.34 mmHg (95% CI 0.85 to 1.82) increase in systolic blood pressure for girls and a 0.57 mmHg (95% CI 0.04 to 1.03) increase in systolic blood pressure for boys. The associations between pollutants and blood pressure were consistent regardless of ethnicity, body size, or socioeconomic status.



Eighty percent of the adolescents studied were from ethnic minority groups, and the residential estimates suggest that these adolescents were exposed to higher levels of the pollutants than were their white peers.



The researchers call for further studies to help confirm and clarify these findings, particularly among young people from different socioeconomic backgrounds. They also note that levels of nitrogen dioxide and PM2.5 in London remain well above World Health Organization Guidelines, suggesting opportunities to reduce pollution and improve lifelong health for adolescents in the city.



“This longitudinal study provides a unique opportunity to track exposures of adolescents living in deprived neighborhoods," said study co-author Seeromanie Harding. "Given that more than 1 million under 18s live in neighborhoods where air pollution is higher than the recommended health standards, there is an urgent need for more of these studies to gain an in-depth understanding of the threats and opportunities to young people’s development.”



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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



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Blood pressure in teens linked to air pollution

Air pollution is known to be a major public health...

Marine invertebrates such as clams, oysters and worms are keystone species that play a critical role in ocean ecosystems. In a new study led by the <a href="https://www.exeter.ac.uk/undergraduate/">University of Exeter</a>, an international team of researchers has investigated the impact of <a href="https://www.earth.com/news/urban-noise-affects-the-color-of-songbirds-beaks/">noise</a> pollution on marine invertebrates.&nbsp;



The experts reviewed hundreds of relevant studies. They concluded that noise from human activities is damaging marine invertebrates in many different ways, and this damage can be fatal.



“Many people are surprised to discover that invertebrates can even perceive sounds, but in fact sound is fundamental to their survival. Light doesn’t travel very well in water but sound does, and invertebrates use sound in a variety of ways," explained study first author Dr. Marta Solé from Universitat Politècnica de Catalunya - BarcelonaTech (UPC).



“Human activities - especially shipping - are changing the ocean soundscape rapidly, and our study brings together the latest evidence on the impacts of this.”



The study revealed that noise from human activities such as shipping and drilling can harm marine invertebrates on a cellular level. Ocean noise is also impacting entire marine ecosystems by changing the health and behavior of predators and prey in complex food webs, explained the researchers.



Some of the changes in behavior that have been documented include a “startle” reaction in response to loud sounds. For example, ship noise has been found to limit the camouflage ability of shore crabs.



The experts also reviewed evidence that ocean noise can delay hatching and egg development in crustaceans, which significantly increases death rates among larvae.



Furthermore, research has shown that low-frequency sounds can cause injuries and even death. Numerous studies have confirmed that blue crabs are often killed as a direct result of underwater explosions.&nbsp;



“Our study underlines that these animals exist in a rich underwater soundscape,” said Dr. Sophie Nedelec from the University of Exeter. “We urgently need to know more about the impacts of noise pollution on these animals and ecosystems."



“Considering that noise can affect invertebrates from cellular to ecosystems level, we need to bring together interdisciplinary expertise to embrace a holistic vision of the problem."



“Given the many pressures being caused by humans - including from climate change and fisheries - we must do everything we can to limit underwater noise.”



The research is published in the journal <a href="https://74n5c4m7.r.eu-west-1.awstrack.me/L0/https:%2F%2Fwww.frontiersin.org%2Farticles%2F10.3389%2Ffmars.2023.1129057%2Ffull/1/01020186ef2945b2-70c1feb9-0d3f-4f4b-a6b9-8081e0cdc241-000000/awzuC7zUjcAq3w8xKIB-5QMuj7Y=313">Frontiers in Marine Science</a>.



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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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Ocean noise can be fatal to marine invertebrates 

Marine invertebrates such as clams, oysters and worms are keystone...

In a study led by the <a href="https://www.uaf.edu/">University of Alaska Fairbanks</a>, experts have concluded that kelp farms could help reduce coastal marine pollution. While this type of seaweed is known for its ability to take up large amounts of carbon dioxide, the new research suggests that kelp is even better at removing <a href="https://www.earth.com/news/reducing-nitrogen-oxide-pollution-could-boost-crop-yields/">nitrogen</a> pollution.&nbsp;



The researchers monitored carbon and nitrogen levels at two mixed-species kelp farms in Alaska, where tissue and seawater samples were collected for analysis. The results showed that some seaweed species are better than others at removing nitrogen from the surrounding water.&nbsp;



Study lead author Schery Umanzor is an assistant professor at UAF’s College of Fisheries and Ocean Sciences.



“Some seaweeds are literally like sponges - they suck and suck and never saturate,” said Professor Umanzor.&nbsp;



“Although carbon and carbon sequestration by kelp receive most of the attention, kelp is actually much better at mitigating excessive amounts of nitrogen than carbon. I think that’s a story that’s really underlooked.”



Coastal nitrogen pollution has many sources, including agricultural runoff and urban sewage. This pollutant poses some major threats to ocean ecosystems such as harmful algal blooms and depleted oxygen levels that compromise the health of marine life.&nbsp;



In the UAF study, the kelp tissue samples revealed that ribbon kelp was more effective than sugar kelp at absorbing both nitrogen and carbon.&nbsp;



Kelp farming is also emerging as a promising way to improve food security. The researchers noted that kelp grown in polluted waters should not be used for food, but could still be a promising tool for helping to clean up the coastline.



Professor Umanzor cautioned that the study was limited to two sites during a single growing season, and is currently processing a larger collection of samples for further research.



The study is published in the <a href="https://www.sciencedirect.com/journal/aquaculture">Aquaculture Journal</a>.



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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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Kelp farms could help clean up coastal nitrogen pollution

In a study led by the University of Alaska Fairbanks,...

Although <a href="https://www.earth.com/news/how-does-water-travel-through-our-solar-system/">water</a> makes up 71 percent of our planet’s surface, scientists are not yet sure where and how this water originated. Many experts have previously argued that water most likely arrived to Earth from meteorites.&nbsp;



However, by analyzing melted meteorites which have been floating around in space since the formation of our solar system (four and a half billion years ago), a team of researchers led by the <a href="https://www.umd.edu/">University of Maryland</a> has discovered that these meteorites had extremely low water content. These findings rule out such meteorites as the primary source of Earth’s water, and could have major implications for the search for water – and implicitly life – on other planets.



“We wanted to understand how our planet managed to get water because it’s not completely obvious. Getting water and having surface oceans on a planet that is small and relatively near the sun is a challenge,” said study lead author Megan Newcombe, a professor of Geology at Maryland.



The scientists analyzed seven melted, or achondrite, meteorites that crashed into our planet billions of years after splintering from at least five astronomical objects which collided to form planets in our solar systems, known as “planetesimals.” During melting, these planetesimals were heated up by the decay of radioactive elements in the early solar system’s history, causing them to separate into layers with a crust, mantle, and core.



The experts used an electron microprobe to measure these objects’ levels of magnesium, iron, calcium, and silicon, as well as a secondary ion mass spectrometry instrument to measure their water contents. While some of the meteorite samples came from the inner solar system, where conditions are assumed to be warm and dry, others originated form colder and icier outer areas of our solar system.



“We knew that plenty of outer solar system objects were differentiated, but it was sort of implicitly assumed that because they were from the outer solar system, they must also contain a lot of water,” said study co-author Sune Nielsen, a geologist at the <a href="https://www.whoi.edu/">Woods Hole Oceanographic Institution</a>. “Our paper shows this is definitely not the case. As soon as meteorites melt, there is no remaining water.”&nbsp;



In fact, the analysis revealed that in these achondrite meteor samples – regardless of their origin – water comprised less than two millionth of their mass, suggesting that the heating and melting of planetesimals causes near-total water loss. However, another type of meteorites called “carbonaceous chondrites” were found to contain up to 20 percent of water, making them the most likely source for the origin of water on Earth. “This finding implies that substantial amounts of water could only have been delivered to Earth by means of unmelted material,” the authors wrote.



Due to the inherent relation between water and life, these findings have important implications beyond Geology, particularly in the ongoing search for extraterrestrial life.&nbsp;



“Water is considered to be an ingredient for life to be able to flourish, so as we’re looking out into the universe and finding all of these exoplanets, we’re starting to work out which of those planetary systems could be potential hosts for life. In order to be able to understand these other solar systems, we want to understand our own,” Newcombe concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41586-023-05721-5">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



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What are the origins of water on Earth?

Although water makes up 71 percent of our planet’s surface,...

The small island of Mauritius in the Indian Ocean has a large number of endemic plants and <a href="https://www.earth.com/news/how-did-warning-coloration-evolve-in-animals/">animals</a> that cannot be found anywhere else in the world. This unique ecosystem is highly interconnected, as many fruit-bearing plants depend on animals to disperse their seeds.&nbsp;



Mauritius faces a serious risk of mass extinction in the coming decades, and researchers at the <a href="https://www.ku.dk/english/">University of Copenhagen</a> have investigated the potential consequences of changes in the composition of the island's frugivore communities.



"Many plants, especially on tropical islands like Mauritius, rely on animals to help spread their seeds. If the animals that can help spread the seeds become extinct, the plants get into trouble because the animals which humans have brought to the island destroy the seeds instead. This increases the risk of the plants that are still on the island dying out," explained study first author Julia Heinen.



In a negative feedback loop, the loss of plants on the island could perpetuate the loss of more frugivorous animals. According to the researchers, the introduction of new animals to the island will not necessarily help.&nbsp;



"After the dodo and other Mauritian animals have become extinct, other animals have come to the island. They have either come with the people or they have found their way to the island themselves. But they cannot replace the function of extinct animals in the ecosystem," said Heinen.



"Now there are rats, pigs, monkeys and some other types of birds. And they actually eat the same fruits, but they handle them in a different way, and it doesn't have a positive effect on the plants."



"If we remove one species from the island, for example the dodo, we destroy the connection to others. It's like a house of cards. Then the plants that were eaten by the dodo and other animals in Mauritius will also be at risk of extinction."



Heinen explained that rats are a big problem when they arrive on an island. "They hide on the ships with the humans, so when the humans came to the island, the rats were there. The rats eat and destroy seeds, but they are also fond of birds' eggs.'



Ever since humans arrived on the island with rats and pigs 400 years ago, the sensitive ecosystem of Mauritius has been impacted. Some other animals, however, have helped to keep the ecosystem functioning.&nbsp;



"The Mauritian fruit bat is a very unique and endangered animal that plays a vital role in the ecosystem because it is one of the few remaining animals that can disperse the plants over the island. But the authorities are actively killing the bats because they are noisy and eat the mangoes in people's backyards," said Heinen. "People are very frustrated, but the authorities ignore the science. And Mauritius is the last place on Earth the bat lives."



“We don’t know yet how to stop extinctions on islands worldwide, but this study makes it clear that on Mauritius we can prevent the loss of the native plants if we stop culling the flying foxes, start conservation projects focused on the Mauritian Bulbul and continue to protect the Telfair’s skink.”



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41467-023-36669-9">Nature Communications</a>.



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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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Native island plants may not survive animal extinctions 

The small island of Mauritius in the Indian Ocean has...

Hawksbill,Turtle,-,Eretmochelys,Imbricata,Floats,Under,Water.,Maldives,Indian

A recent study led by <a href="https://ucsd.edu/">UC San Diego</a> highlights the dangers faced by global coral reef systems due to <a href="https://www.earth.com/news/citizens-should-help-determine-the-future-of-our-oceans/">ocean</a> deoxygenation, which is the decline of oxygen in marine waters.



Although deoxygenation has been extensively researched, hypoxia in coral reefs is not well-studied. The current investigation is unprecedented because it explored hypoxia in 32 coral reef sites across Japan, Hawaii, Panama, Palmyra, and Taiwan.



“This study is unique because our lab worked with a number of collaborators to compile this global oxygen dataset especially focused on coral reefs - no one has really done that on a global scale before with this number of datasets,” said marine scientist Ariel Pezner, a postdoctoral fellow at the Smithsonian Marine Station in Florida.



A study of this scale is vital because deoxygenation is a serious threat to coral reefs and will become more relevant as oceans warm due to climate change. The results revealed that coral reef hypoxia is widespread.



The researchers discovered that 84 percent of the reefs in the study experienced “weak to moderate” hypoxia, and 13 percent experienced “severe” hypoxia.



“We were surprised to find that a lot of coral reefs are already experiencing what we would define as hypoxia today under current conditions,” added Pezner.



Due to the biological functions of the reefs, hypoxia is more severe at night, while many ocean creatures are respiring instead of producing oxygen.



“Imagine that you’re a person who is used to sea-level conditions, and then every night you have to go to sleep somewhere in the Rocky Mountains, where the air has less oxygen," said biogeochemist Andreas Andersson.



"This is similar to what these corals are experiencing at nighttime and in the early morning when they experience hypoxia. And in the future, if the duration and intensity of these hypoxic events gets worse, then it might be like sleeping on Mount Everest every night.”



The researchers say that more studies are needed to determine baseline oxygen levels, track other hypoxia events, and to analyze how reefs are affected.



“Baseline oxygen conditions varied widely among our reef habitats, suggesting that a singular definition of ‘hypoxia’ may not be reasonable for all environments,” concluded Pezner. “Determining which thresholds are relevant will be important moving forward in making predictions about how reefs might change under warming and oxygen loss.”



The study is published in the journal <a href="https://www.nature.com/nclimate/">Nature Climate Change</a>.



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By <a href="mailto:nire518@gmail.com">Erin Moody</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Coral reefs are increasingly exposed to low oxygen levels 

A recent study led by UC San Diego highlights the...

Although there are a lot of potentially useful raw materials bound up in used plastic products such as food wrap or grocery bags, until recently it has been much cheaper to continue producing more of these single-use plastics than to recover and recycle them. Now, a team of researchers led by the Department of Energy’s <a href="https://www.pnnl.gov/">Pacific Northwest National Laboratory</a> (PNNL) has managed to crack the code that stymied prior attempts to break down these persistent plastics.



Usually, <a href="https://www.earth.com/news/recycling-is-not-enough-to-address-the-plastic-crisis/">recycling</a> plastics requires “cracking” or splitting apart the powerful and stable chemical bonds that also make these products so persistent in the environment. This process requires very high temperatures, and is thus expensive and energy intensive.&nbsp;



However, the experts succeeded in combining the cracking step with a second reaction step which immediately completes the conversion to a liquid gasoline-like fuel without unwanted byproducts. This second step deploys what are known as alkylation catalysts, which provide a chemical reaction currently deployed by the petroleum industry to improve the octane rating of gasoline. Crucially, this reaction immediately follows the cracking step in a single reaction vessel, near room temperature&nbsp;(70 degrees Celsius/158 degrees Fahrenheit).



“Cracking just to break the bonds results in them forming another one in an uncontrolled way, and that’s a problem in other approaches,” said&nbsp;study co-author Oliver Y. Gutiérrez, a chemist at PNNL. “The secret formula here is that when you break a bond in our system, you immediately make another one in a targeted way that gives you the end product you want. That is also the secret that enables this conversion at low temperature.”



“The fact that [the petroleum] industry has successfully deployed these emerging alkylation catalysts demonstrates their stable, robust nature,” added senior author&nbsp;Johannes Lercher, the director of PNNL’s<a href="https://www.pnnl.gov/projects/institute-integrated-catalysis">&nbsp;Institute for Integrated Catalysis</a>. “This study points to a practical new solution to close the carbon cycle for waste plastic that is closer to implementation than many others being proposed.”



The scientists found that this process functions only for low-density polyethylene products (LDPE), such as plastic films and squeezable bottles, and polypropylene products (PP), which are not usually collected in recycling programs in the U.S. By contrast, high-density polyethylene (HPDE) would require a pretreatment in order to allow the catalyst access to the bonds that it needs to crack.



“To solve the problem of persistent waste plastic, we need to reach a critical point where it makes more sense to collect it and return it to use than to treat it as disposable. We’ve shown here that we can make that conversion quickly, at mild conditions, which provides one of the incentives to move forward to that tipping point,” Lercher concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1126/science.ade7485">Science</a>.



—-



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



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Scientists find cheaper method of recycling plastics

Although there are a lot of potentially useful raw materials...

Spring is arriving earlier as a result of global warming, and this phenomenon threatens to disrupt plant and pollinator interactions. In a new study led by the <a href="https://umich.edu/">University of Michigan</a>, researchers have discovered that some plants are not just flowering earlier, but are also producing bigger flowers to attract pollinators.



The experts found that between 2003 and 2012, the common morning glory in the southeastern United States increased the size of its flowers. This change was most pronounced at northern latitudes. Previously, scientists have reported finding more dramatic evolutionary responses to climate change in the northern part of a plant's range.



According to the researchers, increased flower size suggests a greater investment by the plants in pollinator attraction. The morning glories had also invested more energy in nectar and pollen to attract more of the bees, syrphid flies, and wasps that pollinate them.&nbsp;



"There is a major gap in our understanding of how traits that are crucial for plant-pollinator interactions may be evolving over time as a response to a changing climate," said study lead author Sasha Bishop.



"We show that - in addition to well-documented shifts to earlier flowering - floral architecture and rewards can also play significant roles in the evolutionary response to contemporary environmental change."&nbsp;



In collaboration with Shu-Mei Chang of the University of Georgia, the experts used a "resurrection approach" for the study. They germinated morning glory seeds that were collected from the edges of agricultural fields in Tennessee, North Carolina and South Carolina in 2003 and 2012.&nbsp;



Over these years, the region had experienced rising temperatures, an increase in the number of extreme rainfall events, and more extreme drought.



The researchers planted the seeds from both years in a greenhouse at the University of Michigan Matthaei Botanical Gardens.&nbsp;



The results showed that morning glory corollas became wider over the course of nine years, jumping from 4.5 centimeters in diameter in 2003 to 4.8 centimeters in 2012. In addition, the study revealed that the morning glories from 2012 started flowering four days earlier.



"This is the first article to use the resurrection approach to examine the potential that traits responsible for plant-pollinator interactions may be evolving over time, concomitant to decreases in pollinator abundance and dramatic environmental changes due to changing climate and land-use regimes," said Bishop.



The study is published in the journal <a href="https://phys.org/news/2023-03-bigger-greater-rewards-climate-disruptions.html">Evolution Letters</a>.



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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.

Morning glories make bigger flowers to entice pollinators

Spring is arriving earlier as a result of global warming,...

To cut carbon emissions, large shipping vessels could be retrofitted with sails so that they can be powered by wind.&nbsp;



A new initiative from the University of Southampton will investigate how modern vessels perform on the ocean when fitted with wing-sails. The experts seek to explore the potential of the technology to decarbonize the UK’s maritime sector.



Lead scientist Dr. Joseph Banks said that global shipping, a large source of emissions, needs to be decarbonized quickly.



“Ships powered by wind is obviously nothing new – but almost every large vessel operating today is powered by fossil fuels, leaving a lasting mark on the environment. While new wind-assist technologies are being developed, many are not ready for market and their predicted fuel savings have not been independently verified at sea, which is why UK-funded research projects like this are so important," said Dr. Banks.&nbsp;



The grants for the Winds of Change project were provided by the Department for Transport and Innovate UK, which is working to transform the UK into a world-leader for clean maritime equipment.



Scientists will test the impact of a retractable 20 meter-high FastRig wing-sail retrofitted on the commercial ship the Pacific Grebe – a 105 meter vessel.



“This is an innovative project because the technology can be retrofitted to pre-existing vessels to quickly reduce emissions from the existing ships and help create quieter, emission-free ships in the future that do no harm to ocean environments and improve air quality in ports towns and cities," said Dr. Banks.&nbsp;



“Our team of researchers will investigate the complex interactions between the wing-sails and the ship hydrodynamics enabling accurate predictions of vessel performance which will be compared to the demonstration vessel Pacific Grebe as part of the project."



Wind power is the fastest way for the sector to reduce emissions. The team hopes their new tool, which predicts the fuel savings delivered by the wing-sails, will drive further investment in marine technology and promote the exciting field of Maritime Engineering.&nbsp;



To learn more about this new research, visit <a href="http://www.southampton.ac.uk/smmi">www.southampton.ac.uk/smmi</a>.



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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



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Wind could be used to power cargo ships

To cut carbon emissions, large shipping vessels could be retrofitted...

In Washington State, bald eagles and dairy farmers exist in a mutually beneficial relationship. This win-win connection is driven by the impact of climate change on eagles' traditional winter diet of salmon carcasses, and the increase in eagle abundance following decades of conservation efforts.



Typically, the narrative around birds and farmers is combative due to livestock predation. However, many farmers have grown to appreciate the services that eagles provide, which includes carcass removal and pest control.



Researchers at the <a href="https://www.washington.edu/">University of Washington</a> and Trinity Western University in Canada conducted interviews with farmers on dairy operations to better understand this unique relationship. The study was motivated by lead author Ethan Duvall’s research showing that eagles have been redistributing from rivers to farmland over the past 50 years.



"Climate change has altered the chum salmon spawning schedule, causing them to run earlier in the winter," said Duvall. "Now the salmon are spawning when annual Nooksack River flooding is at its peak. The fish who spawn and die are swept away by the high water instead of being deposited on shore where the eagles can easily access them."



Many rivers in the Pacific Northwest have experienced dramatic salmon population declines, eliminating winter resources for eagles. To adapt, eagles have turned to dairy farm by-products resulting from the births and deaths of cows and prey on waterfowl populations in agricultural areas.



"We know this positive interaction between farmers and bald eagles is not the norm in many other agricultural areas, especially near free-range poultry farms where the eagles snatch chickens," said Duvall.



"But this study gives me hope that, moving forward, farmers, wildlife managers, and conservationists can come together to think critically about how to maximize benefits for people and wildlife in the spaces they share."



The research is published in the journal <a href="http://dx.doi.org/10.1002/ecs2.4456">Ecosphere</a>.



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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



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Farmers and bald eagles can coexist peacefully

In Washington State, bald eagles and dairy farmers exist in...

In a study led by the <a href="https://www.uq.edu.au/">University of Queensland</a>, scientists have investigated the genome of the Australian black swan to examine its susceptibility to infectious <a href="https://www.earth.com/news/why-rodent-borne-diseases-spill-over-into-humans/">diseases</a>. The researchers found that black swans lack some of the immune-related genes that are needed to fight off bird flu and other viral illnesses.&nbsp;



"The Australian black swan (Cygnus atratus) is an iconic species with contrasting plumage to that of the closely related northern hemisphere white swans," wrote the study authors.



"The relative geographic isolation of the black swan may have resulted in a limited immune repertoire and increased susceptibility to infectious diseases, notably infectious diseases from which Australia has been largely shielded."



"Unlike mallard ducks and the mute swan (Cygnus olor), the black swan is extremely sensitive to highly pathogenic avian influenza."



Study co-author Dr. Kirsty Short noted that black swans can die from the avian flu HPAI within three days.



“Our data suggests that the immune system of the black swan is such that, should any avian viral infection become established in its native habitat, their survival would be in peril," explained Dr. Short.



“We currently don’t have HPAI in Australia, but it has spread from Asia to North America, Europe, North Africa and South America."



When the bird flu was introduced to new locations, such as Chile and Peru, it killed thousands of wild seabirds, noted Dr. Short. “The risk to one of Australia’s most unique and beautiful birds is very real, and we need to be prepared if we hope to protect it.”



The researchers hope their findings will be able to better protect not only the black swan, but also other susceptible species across the globe.



“We want to increase awareness about how vulnerable Australia’s bird species are to avian influenza and the highly precarious situation they are in,” said Dr.&nbsp; Short.



The research was funded by the Australian Department of Agriculture and Water Resources and an Australian Research Council Discovery Early Career Researcher Award.



The study is published in the journal <a href="http://dx.doi.org/10.1186/s13059-022-02838-0">Genome Biology</a>.



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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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Black swans do not have the genes to survive bird flu

In a study led by the University of Queensland, scientists...

South Col - a windswept, snow-free rocky dip located five miles above sea level in the Himalayan Mountains between Mount Everest and its sister peak Lhotse – is the place where hundreds of adventurers camp each year before attempting to climb the world’s largest peak from the southeastern side.&nbsp;



According to a team of scientists led by the <a href="https://www.colorado.edu/">University of Colorado Boulder</a>, they are also leaving behind a frozen legacy of highly resistant <a href="https://www.earth.com/news/how-can-deep-ocean-microbes-survive-without-sunlight/">microbes</a> that can survive harsh conditions at high elevations and lie dormant in the soil for decades or even centuries. While highlighting the invisible impact of tourism on the world’s highest mountains, these findings also provide a better understanding of the environmental limits to life on our planet, as well as in other places in the universe where life may exist.&nbsp;



The scientists collected soil samples from South Col and analyzed them in several labs at CU Boulder by using both traditional culturing techniques and next-generation gene sequencing methods, in order to determine the diversity of microorganisms found in the samples.&nbsp;



The analyses revealed that most of the microbial DNA sequences were similar to hardy, or “extremophilic” organisms previously detected in other high-elevation sites in the Antarctica or the Andes, with the most abundant organism being a fungus in the genus Naganishia, which is known to be able to withstand extremely high levels of cold and ultraviolet radiation.&nbsp;



Surprisingly though, the experts also found microbial DNA of some organisms heavily associated with humans such as Staphylococcus, one of the most widespread skin and nose bacteria, and&nbsp;Streptococcus, a type of microbe usually infecting the human mouth. While the researchers were not surprised that humans left behind microorganisms – since microbes are nearly everywhere and can easily move around through the air at significant distances from camps or trails – they were nevertheless impressed by the fact that certain microbes which have evolved to thrive in warm and wet environments such as our noses and mouths are resilient enough to survive in a dormant state in the extremely harsh conditions from South Col.&nbsp;



Although the impact of these microbes on the Himalayan environment is expected to be minimal, their presence there raises alarm for humans’ possible impact on extraterrestrial worlds that we may one day be able to travel to. “We might find life on other planets and cold moons. We’ll have to be careful to make sure we’re not contaminating them with our own,” concluded senior author Steven Schmid, a professor of Ecology and Evolutionary Biology at CU Boulder.



The study is published in the journal <a href="https://doi.org/10.1080/15230430.2023.2164999">Arctic, Antarctic, and Alpine Research</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



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Humans are leaving behind microbes on Mount Everest

South Col - a windswept, snow-free rocky dip located five...

Green,Ecoduct,Over,An,Empty,Highway,During,Sunset.

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A new long-term study in Monkton, Vermont, reveals that wildlife tunnels significantly reduce amphibian road mortality during seasonal migrations. 



Frogs and salamanders often cross roads to reach breeding ponds each spring, but many are killed by vehicles. 



Researchers from the <a href="https://www.uvm.edu/" target="_blank" rel="noreferrer noopener">University of Vermont</a>, in collaboration with local citizens and the Vermont Agency of Natural Resources, installed two underpass tunnels in 2015. 



Over a 12-year monitoring period, they observed an 80.2% reduction in amphibian deaths, and up to 94% for non-climbing species like salamanders. 



The study used a before-after-control-impact design and documented more than 5,200 amphibians, highlighting the tunnels’ effectiveness even in nearby buffer zones.



Funded at $342,397 - far cheaper than wildlife crossings for large mammals - the project showcased the power of community-led conservation.



Local groups initiated the effort after observing mass amphibian deaths. Wildlife cameras later captured over 2,200 amphibians using a tunnel in just one spring, along with other species like raccoons and bobcats, indicating wider ecosystem benefits.



This marks the first peer-reviewed, long-term data set in the northeastern U.S. confirming amphibian-specific underpasses work. 



The study urges transportation departments to incorporate these designs into road planning and highlights how community action, thoughtful infrastructure, and persistence can make a real difference for biodiversity.



The full study was published in the <a href="https://linkinghub.elsevier.com/retrieve/pii/S1617138125000780" target="_blank" rel="noreferrer noopener">Journal for Nature Conservation</a>.



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Wildlife tunnels save millions of amphibians

https://youtu.be/XYgiPzmNBTU?si=eFYY7gPHU1JznLvU A new long-term study in Monkton, Vermont, reveals that...

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 <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



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Designing crops that can beat the heat

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

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Today's Video of the Day from <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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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&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> Staff Writer 



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Lesotho: Africa's "Kingdom in the Sky"

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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



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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 <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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2022 illustrated the consequences of a warming climate

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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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Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



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.

Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes how Earth is unique in our solar system for its ability to sustain liquid water on its surface. But now, the water cycle is shifting as the climate warms, and scientists must find ways to predict how these changes will affect water availability.



Overall, 96 percent of Earth's water is saltwater, and nearly all of freshwater is found in ice and groundwater. These sources of water are linked as it passes through solid, liquid and gas phases.



In a warmer climate, the water cycle will be transformed. It will be easier for water to evaporate and form clouds, and storms will become more frequent and intense. Some regions will get too much water, while others will be left without enough water. In addition, soil moisture will be lost - which threatens food security.



Scientists are using satellite data from over the last 40 years to track changes that are happening in the water cycle. This will ultimately help us prepare for extreme events and better manage our water resources, according to ESA.



Video 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.

Tracking changes in Earth's water cycle

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Saturn,-,High,Resolution,3d,Images,Presents,Planets,Of,The

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard Space Flight Center</a> features images of Saturn from NASA’s Hubble Space Telescope. The photographs capture the start of the mysterious "spoke season" on Saturn - when unexplained features appear on its rings. 



According to NASA, both the cause of the spokes and their seasonal variability have yet to be fully explained by planetary scientists.



"Like Earth, Saturn is tilted on its axis and therefore has four seasons, though because of Saturn's much larger orbit, each season lasts approximately seven Earth years. Equinox occurs when the rings are tilted edge-on to the Sun," explains NASA.



"The spokes disappear when it is near summer or winter solstice on Saturn. (When the Sun appears to reach either its highest or lowest latitude in the northern or southern hemisphere of a planet.) As the autumnal equinox of Saturn's northern hemisphere on May 6, 2025, draws near, the spokes are expected to become increasingly prominent and observable."



Experts believe that the spokes may be a product of the planet's variable magnetic field. When magnetic fields interact with solar wind, an electrically charged environment is created. This phenomenon is visible on Earth as the northern lights.&nbsp;



"Scientists think that the smallest, dust-sized icy ring particles can become charged as well, which temporarily levitates those particles above the rest of the larger icy particles and boulders in the rings," says NASA.



The spokes were first observed in the early 1980s by NASA's Voyager mission. Depending on the angle of the rings, the spokes can appear dark or light.



"Thanks to Hubble's OPAL program, which is building an archive of data on the outer solar system planets, we will have longer dedicated time to study Saturn’s spokes this season than ever before," said NASA senior planetary scientist Amy Simon, head of the Hubble Outer Planet Atmospheres Legacy (OPAL) program.



"Despite years of excellent observations by the Cassini mission, the precise beginning and duration of the spoke season is still unpredictable, rather like predicting the first storm during hurricane season."



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.

Mysterious "spoke season" captured on Saturn

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Closeup,Of,Fresh,Green,The,Napier,Bush,Grass,As,Animal

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Today’s Video of the Day from <a href="http://www.ntu.edu.sg/">NTU Singapore</a> reveals that some plants can remove toxic heavy metals from soil.&nbsp;



The researchers analyzed samples of various tropical plant species to test for levels of heavy metals and metalloids. The study showed that there are existing plants with high levels of these contaminants, which means that these species are great candidates for drawing pollutants out of the soil.&nbsp;



Among the plants examined in the study, 12 species had accumulated several types of heavy metals and metalloids. These plants are widely available, including species that are native to Singapore.



“In a small nation like Singapore, land may be repurposed to support new development plans, so it is important that we have a green and sustainable way to remediate land that is contaminated," said Professor Lam Yeng Ming.



"We set out to uncover how to better make use of tropical plants to do phytoremediation and through advanced characterization techniques, we showed how some of these tropical plant species can be an environmentally friendly and literally a 'green' way to remove contaminants in soil."&nbsp;



"Phytoremediation also has benefits of cost effectiveness, simplicity of management, aesthetic advantages, and long-term applicability and sustainability. The strategy prevents erosion and metal leaching by stabilizing or accumulating heavy metals, so that helps reduce the risk of contaminant spread.”



Video Credit: NTU Singapore



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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.

Plants help remove heavy metals from contaminated soil

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes why herbicides are not as effective in killing weeds anymore. In the 20th century, chemical companies developed thousands of herbicides. The most commonly used herbicide was glyphosate, which was introduced in 1974.



Over the past few decades, dozens of species of weeds have evolved resistance to glyphosate. Depending on the site of action, the part of the plant that an herbicide interacts with, weeds may even be resistant to herbicides that have not been developed yet.&nbsp;



With increasing resistance to glyphosate and other herbicides, weeds are - once again - becoming a major concern for farmers.&nbsp;



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.

Weeds are becoming increasingly resistant to herbicides

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Today’s Video of the Day from the <a href="https://www.jpl.nasa.gov/">NASA Jet Propulsion Laboratory</a> (JPL) describes a dust storm on Mars that was nearly twice the size of the United States. As the storm covered the southern hemisphere of the planet, some of NASA’s explorers had to delay their normal activities.



NASA’s Insight lander put itself in a "safe mode" for 11 days to conserve battery power because solar power was disrupted by the dust. The Ingenuity Mars Helicopter postponed flights until conditions improved.



"A fleet of NASA orbiters monitor Martian dust storms like this one and serve as lifelines to Earth by relaying data from the rovers and lander on the ground back to the team. This includes the Mars Reconnaissance Orbiter, MAVEN, and Odyssey," reports JPL.



"Dust storms like this recent one start close to the ground and are spread by wind as they rise – warming the cold Martian atmosphere."



The images in the video were captured by NASA’s Curiosity as the dust rolled in. A fleet of orbiters monitored the dust storm from above, relaying data from Mars’ explorers back to scientists on Earth.



Video &amp; Image Credit: NASA/JPL-Caltech/ASU/MSSS



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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.

NASA monitors giant dust storms on Mars

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Today's Video of the Day from the <a href="http://www.esa.int/">European Space Agency</a> features Qeshm Island in the Strait of Hormuz. This strait provides the only sea passage from the Persian Gulf to the open ocean.



Qeshm is separated from the Iranian coast by the Clarence Strait, also known as Khuran.&nbsp;The Hara Forest Protected Area is a network of shallow waterways and forest located between the island and the mainland. This protected region is home to sea turtles, snakes, and more than 150 species of migrating birds.



Qeshm is famous for its wide range of&nbsp;ecotourist&nbsp;attractions, such as the&nbsp;Hara marine forests. According to environmentalists, about 1.5 percent of the world birds and 25 percent of Iran's native <a href="https://www.earth.com/news/female-hummingbirds-avoid-sexual-harassment-by-looking-like-males/">birds</a> annually migrate to the forests, which are the first national geo park in Iran.



Tourists are also drawn to the island to see an age-old Portuguese&nbsp;fort, historic mosques, the&nbsp;Seyyed Mozaffar&nbsp;and&nbsp;Bibi Maryam&nbsp;shrines, and the "Valley of Stars."



The average temperature on the island is 81 degress and the region is often hot and humid. From June to August, the island is described as being oppressively hot. The ideal time to visit is during the winter season. 



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.

Qeshm Island in the Strait of Hormuz

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Inhambane Bay in southeast Mozambique.&nbsp;



"Inhambane Bay is a deep inlet into which the small Mutamba River flows," says ESA. "On one side of the bay lies the historical city of Inhambane, capital of the Inhambane Province, while the sister city of Maxixe, the economic capital of Inhambane, sits across from it. The province is the second largest grower of cashews, after Nampula, and it also produces coconut and citrus fruits."



The beaches of Barra and Tofo are popular with tourists. There are also coral reefs along the long coastline of Inhambane, making it an ideal destination for scuba diving and snorkeling.



"Mozambique’s extensive coastline heightens the country’s vulnerability to tropical cyclones that develop in the Indian Ocean as well as storm surge flooding," says ESA.



"More than half of the population lives in low lying coastal areas, putting communities at risk. Inhambane Bay was dangerously close to where Cyclone Idai made landfall in 2019 causing widespread destruction to the country."



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.

Inhambane Bay in southeast Mozambique

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency </a>&nbsp;features the Kangerlussuaq Glacier, one of the largest tidewater outlet glaciers in Greenland. The glacier is located on the east coast of the Greenland ice sheet.



As human-induced climate change continues to drive up temperatures, global ice loss is accelerating at an alarming rate. ESA reports that, over the past decade alone, 3.5 trillion tons of ice have melted from the Greenland ice sheet. This is enough to cover the UK with meltwater 15 meters deep.



Based on satellite imagery, researchers determined that Kangerlussuaq entered a new phase of rapid retreat and acceleration in 2017. In their study, published in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00123/full">Frontiers in Earth Science</a>,&nbsp; the experts report that the glacier's ice front is now at its most retreated position since the early 20th century.



"Given Kangerlussuaq’s previous impacts on both the magnitude and pattern of ice sheet wide mass loss, we predict that its new phase of retreat, acceleration and thinning will markedly enhance the south-east region’s contribution to increasing discharge from the ice sheet," wrote the study authors.&nbsp;&nbsp;



"More broadly, accurate forecasting of the ice sheet’s contribution to sea level rise will require a deeper understanding of, and responses to, these non-linear ice dynamic processes."



Video 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.

Kangerlussuaq Glacier on the Greenland ice sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the complex relationship between ocean and climate. ESA's Climate Change Initiative will help us understand how oceans influence the climate and how climate change is impacting the oceans.&nbsp;



"Earth’s oceans are huge heat stores, soaking up 93% of the excess heat from human activity over the past 70 years. Ocean currents redistribute heat around the planet, from the Equator to the poles. Where this ocean heat goes influences weather patterns and regional climate," explains ESA.



"As well as absorbing heat, oceans are a natural carbon sink, absorbing a quarter of carbon dioxide emissions from human activity. This has led to the acidification of ocean water, threating marine life."



The amount of heat and carbon dioxide soaked up by the ocean depends on specific variables, including phytoplankton, temperatures, waves, salinity, and ice cover. Satellites can be used to measure these variables from space.



"From their unique vantage point, satellites provide key information for understanding the complexities of our planet and monitoring environmental issues," says ESA.



Video 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.

Ocean heat influences regional climate

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