The thin line of gold behind every tap, swipe, and click on our electronic devices rarely enters daily conversation, yet the metal keeps digital life running, then eventually turn into landfills full of toxic e-waste. 



From the contacts in a phone jack to the chips inside a smartwatch, gold moves electrons smoothly and shrugs off corrosion. 



Mining more, however, blasts mountains, drains rivers, and spews carbon. With the global appetite for electronics still climbing, attention has turned to the growing junkyard of cast‑off gadgets.



E‑waste is now the quickest‑rising waste stream on the planet - roughly 63 million short tons in 2024 according to <a href="https://www.unep.org/ietc/what-we-do/e-waste-management" target="_blank" rel="noreferrer noopener">United Nations estimates</a> - and only a small share gets recycled in certified facilities. 



Most of our old electronics end up in landfills or backyard workshops, which then leak metals into the groundwater, creating toxic brews. A cleaner strategy is to reclaim precious metals safely before our devices make their way into the garbage heaps.



<h2 class="wp-block-heading" id="h-cheese-e-waste-and-gold">Cheese, e-waste, and gold</h2>



A research team is now working to change that script. Professor Raffaele Mezzenga at <a href="https://ethz.ch/en.html" target="_blank" rel="noreferrer noopener">ETH Zurich</a> and senior scientist Mohammad Peydayesh assembled colleagues in search of a simpler tool than acid vats or cyanide baths. Their unlikely inspiration bubbles up in cheese factories.



Cheese makers separate <a href="https://www.earth.com/news/cottage-cheese-is-making-a-comeback-due-to-its-nutritional-benefits/" target="_blank" rel="noreferrer noopener">curds from whey</a>, leaving behind nearly nine pounds of watery by‑product for every pound of cheddar. Whey is rich in proteins that twist into hair‑thin amyloid fibrils when warmed in acid. 



The Zurich group realized those fibrils could be coaxed into a feather‑light sponge that prefers gold over the other metals lurking in <a href="https://www.earth.com/news/electronic-waste-is-growing-five-times-faster-than-recycling/" target="_blank" rel="noreferrer noopener">shredded phones and laptops</a>.



<h2 class="wp-block-heading" id="h-adding-a-cheesy-twist-to-golden-e-waste">Adding a cheesy twist to golden e-waste</h2>



The researchers stirred the fibrils into a gel, then dried it into an aerogel - think Styrofoam’s airiness on a nanoscale. Microscopic pores criss‑cross the material, offering miles of surface area inside a crumb‑sized cube. 



When a slice of this sponge meets a beaker filled with dissolved circuit boards, gold ions rush toward the proteins and cling tightly.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_schematic_credit-ETH-Zurich_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_schematic_credit-ETH-Zurich_1s.webp" alt="Schematic route followed to generate neat value via pure gold, extracted from food waste (whey) and e-waste as starting source materials. Credit: Advanced Materials" class="wp-image-1968796"/></a><figcaption class="wp-element-caption">Schematic route followed to generate neat value via pure gold, extracted from food waste (whey) and e-waste as starting source materials. Click image to enlarge. Credit: Advanced Materials</figcaption></figure>



Early trials showed the aerogel collecting a far higher share of gold than plastic resins that recyclers often use. Better yet, the process skips noxious solvents. 



Water, moderate heat, and the natural chemistry of protein do the heavy lifting, which slashes both hazard and cost.



<h2 class="wp-block-heading" id="h-aerogel-and-a-protein-sponge">Aerogel and a protein sponge</h2>



For a head‑to‑head laboratory test, the team stripped metal parts from twenty <a href="https://www.earth.com/news/international-day-of-zero-waste-a-global-commitment-to-a-sustainable-future/" target="_blank" rel="noreferrer noopener">discarded computer motherboards</a>, dissolved them in acid, and dropped in a fingernail‑sized piece of aerogel. 



Copper, nickel, and cobalt swirled in the brew, yet gold ions settled on the sponge far more efficiently. After a short soak, the solution cleared, signaling that most of the precious metal had left the liquid.



Numbers tell the story. The sponge drew out gold that was about 90.8 percent pure - close to 22‑karat jewelry - on its first pass. Competing adsorbents usually require extra purification steps to reach similar purity.



<h2 class="wp-block-heading" id="h-from-e-waste-ions-to-gold-nuggets">From e-waste ions to gold nuggets</h2>



Pulling ions from solution is useful; turning them back into solid metal is crucial. The Zurich group warmed the loaded sponge until the <a href="https://www.earth.com/news/fools-gold-may-be-a-valuable-source-of-lithium/" target="_blank" rel="noreferrer noopener">gold ions</a> shed their charge and merged into shimmering flakes. 



Heating continued until the flakes fused into a nugget weighing roughly 450 milligrams. Chemical analysis showed the lump was 91 percent gold and 9 percent copper, again hitting the mark for 22 carats.



This step also freed the protein skeleton. Burned away under controlled heat, the whey‑derived matrix leaves no synthetic residue, easing cleanup. Conventional resin beds cannot claim the same neat exit.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_gold-nuggets-recovered_Credit-ETH-Zurich_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_gold-nuggets-recovered_Credit-ETH-Zurich_1s.webp" alt="The gold nugget obtained from computer motherboards in three parts. The largest of these parts is around five millimeters wide. Credit: ETH Zurich/Alan Kovacevic" class="wp-image-1968794"/></a><figcaption class="wp-element-caption">The gold nugget obtained from computer motherboards in three parts. The largest of these parts is around five millimeters wide. Click image to enlarge. Credit: ETH Zurich/Alan Kovacevic</figcaption></figure>



Recycling lives or dies on the balance sheet. Here the math looks encouraging. 



Procurement and energy costs for the entire operation are about fifty times lower than the market value of the gold retrieved. Even after accounting for labor and overhead, that margin hints at solid profit for commercial recyclers.



Lower operating costs open doors for smaller regional plants. Instead of shipping obsolete electronics overseas, communities could process them nearby, cutting transportation emissions and keeping revenue local.



<h2 class="wp-block-heading" id="h-e-waste-has-more-than-just-gold">e-Waste has more than just gold</h2>



Gold steals headlines, yet the technique need not stop there. By tweaking pH or tailoring the protein structure, the same sort of sponge could sort copper, cobalt, or <a href="https://www.earth.com/news/water-captured-on-video-forming-out-of-thin-air-for-the-first-time/" target="_blank" rel="noreferrer noopener">palladium</a> - metals vital for batteries and sensors. 



The team is already experimenting with pea‑protein waste from plant‑based milk production and collagen from fish scales. Success would guard against supply bottlenecks tied to a single dairy stream.



E‑waste is not the only target. Industrial rinse water from <a href="https://www.earth.com/news/quantum-computer-defeats-a-supercomputer-in-crucial-annealing-optimization-task/" target="_blank" rel="noreferrer noopener">microchip fabrication</a> and gold‑plating shops also carries trace metals worth reclaiming. A modular protein sponge could slip into those lines, trimming costs and curbing runoff.



<h2 class="wp-block-heading" id="h-taking-the-next-steps">Taking the next steps</h2>



“The fact I love the most is that we’re using a food industry byproduct to obtain gold from electronic waste,” Mezzenga says. In a very real sense, the method transforms two waste products into gold. “You can’t get much more sustainable than that!”



If pilot projects scale as hoped, tomorrow’s recycling centers may sit beside creameries and food processors, quietly turning yesterday’s whey and last decade’s gadgets into tomorrow’s circuit traces. 



The approach will not halt mining overnight, but every recovered ounce delays a blast, a slurry pond, or a diesel haul truck. 



That shift, multiplied across millions of phones and laptops, offers a straightforward path toward lighter footprints and longer‑lived resources - no new mountains required.



The full study was published in the journal <a href="https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202310642" target="_blank" rel="noreferrer noopener">Advanced Materials</a>.



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Invention turns our electronic waste into 22-carat gold nuggets instead of toxic trash

The thin line of gold behind every tap, swipe, and click on our electronic devices rarely enters daily conversation, yet the metal keeps digital life running, then eventually turn into landfills full of toxic e-waste. From the contacts in a phone jack to the chips inside a smartwatch, gold moves electrons smoothly and shrugs off corrosion. Mining more, however, blasts mountains, drains rivers, and spews carbon. With the global appetite for electronics still climbing, attention has turned to the growing junkyard of cast‑off gadgets. E‑waste is now...

The first thing conservation biologists need if they are to protect an endangered species is the ability to identify it accurately. Until recently, this has been a problem with the endemic salt marsh harvest mouse (Reithrodontomys raviventris) which is found only in the tidal marshes of the San Francisco Estuary.

"If people misidentify the species, they have a false impression that they're doing well," said Mark Statham, lead author and researcher with the Mammalian Ecology and Conservation Unit within the <a href="https://www.ucdavis.edu/">UC Davis School</a> of Veterinary Medicine.

These small rodents have lost three-quarters of their habitat to human expansion as the marshes have been drained for housing developments. Along with rising sea levels, this has left salt marsh harvest mice with few options. They have been listed as endangered under both the California and U.S. Endangered Species Acts.

Two subspecies of salt marsh harvest mice occur in the San Francisco Bay area, with the southern subspecies being the more endangered. Conservation work has, thus far, proven difficult because the mice look very similar to the western harvest mouse, a non-endangered species that lives in the same area. 

But now, scientists from UC Davis have used DNA analysis, along with body measurements and other physical characteristics to develop an identification tool that can be used in the field. They collected data from 204 harvest mice trapped in the southern species’ population range. Overall, 48 were endangered salt marsh harvest mice and the rest were western harvest mice.   

The team then used a statistical analysis to identify the most useful characteristics to distinguish between the two species. These turned out to be the color of the belly hair and the hair underneath the tail. Results of the DNA analysis were used to verify each individual’s species. 

A “decision tree,” or dichotomous key, was then drawn up to assist biologists with identification in the field. When tested against a sample of harvest mice of known species, the key was able to identify 94 percent of 179 harvest mice to species level with 99 percent accuracy.

Accurate identification will allow conservationists to understand the range, habitat, abundance, demography, and population trends of the endangered species, and this information will inform conservation efforts. 

"Now field researchers can go in the field and identify the animal immediately," said Statham. "Without something like this, you don't really know what you've got."

Details of the study were published this month in a special issue of the journal <a href="https://wildlife.ca.gov/">California Fish and Wildlife</a>.

---

By <a href="http://bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Salt marsh mice can now be identified using a “decision tree”

The first thing conservation biologists need if they are to...

In a first-of-its-kind study, researchers fixed GPS activity trackers to baboons to examine the costs of sticking together in a group.  

Baboons live in stable social groups and travel in troops that are made up of different sized individuals. These mixed-age groups may contain large males weighing as much as 30 kg along with juveniles, <a href="https://www.earth.com/news/children-who-live-near-woodlands-have-better-mental-health/">adolescents</a> and females. 

The benefits of traveling along together include the early detection of predators and the sharing of important information.

However, researchers from the <a href="https://www.ab.mpg.de/">Max Planck Institute of Animal Behavior</a> have recently shown that all baboons compromise on moving at their preferred speed in order to keep the group together.

Baboons in a troop at the Mpala Research Center in Kenya were fitted with GPS trackers and accelerometers. The GPS data indicated where the animals moved, and the accelerometers gave information on speed and number of steps, in much the same way as a Fitbit device. 

In 2012, when study senior author Meg Crofoot began the study of these 25 baboons, she was the first to ever use GPS tracking on a large group of primates.

The results indicated that, although all baboons modified their movements, the smallest individuals had to move faster than their preferred pace, travel further, and use more energy than other size groups. 

"Small individuals pay disproportionate costs associated with maintaining group cohesion, and this might be because they have the most to gain from group membership," explained study co-author Roi Harel.

The scientists then used computer simulations to test whether a cohesive group would form if all baboon members moved at their preferred speed and did not compromise. 

“Our simulations demonstrate that to replicate the levels of cohesion we observe in wild baboons, group members need to adjust their patterns of movement in response to who they are next to and where they are in the group," said Harel.

According to the scientists, this is an unusual example of a democratic process taking place in the social interactions of a species that is highly despotic. 

“The dominant male clearly wields power over other baboons in one-on-one interactions," said Harel. "But when it comes to collective movement, it seems like a shared decision-making process drives the group."

The findings have been published in the journal <a href="https://royalsocietypublishing.org/journal/rspb">Proceedings of the Royal Society B</a>.

---

By <a href="http://bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Sticking together can come at a cost for baboons

In a first-of-its-kind study, researchers fixed GPS activity trackers to...

Commercial deep sea mining is scheduled to begin within two years, but scientists warn that this type of mining is unnecessary and even dangerous.  

A new study led by scientists at the <a href="https://www.exeter.ac.uk/">University of Exeter</a> calls into question why deep seabed mining should proceed when it’s such an unpredictable risk to <a href="https://www.earth.com/news/mysterious-circling-behavior-discovered-among-marine-mammals/">marine</a> health. 

As of now, deep sea mining is allowed in the exclusive economic zones of coastal nations. Meanwhile, the International Seabed Authority (ISA) is drawing up new regulations for deep sea mining outside of these areas. 

With pressure mounting from the Pacific island of Nauru and The Metals Company, the ISA has two years to finish its regulations. If they are not finished within this time period, mining can begin with no regulations in place. Dr. Kirsten Thompson of the University of Exeter explains the conundrum that seabed mining presents.

"Seabed mining is sometimes presented as an unavoidable consequence of ever-growing demand for minerals, especially to supply certain metals for the green technology transition," said Dr. Thompson.  

"This narrative is put forward by mining companies, who also present deep-sea mining as the ‘lesser of two evils’ in comparison to land-based mining, but it’s impossible to compare the inherent value of land and deep-sea ecosystems. If you're asking 'which destructive industry is better?' then you're asking the wrong question."

The scientists emphasize that better engineering and efficiency are of utmost importance and that it’s simply a "myth" that deep sea mining is necessary. 

"Current estimates of mineral requirements for renewable technology don't fully account for important factors such as technological advances in battery technology, better public transport and behaviour changes such as people taking fewer journeys by car,” said Dr. Kevin Brigden, a metals chemist with Greenpeace Research Laboratories.

There’s also an enormous amount that we do not know about deep sea ecosystems, their role in carbon storage, their biodiversity, or how they could be threatened by mining. The researchers point out that mining is likely to benefit only a handful of mining companies in the world’s richest nations - while threatening the entire world. 

The University of Exeter has launched a "Green Futures" campaign and website to drive action on the environment and climate emergency. To find out more, please visit <a href="https://greenfutures.exeter.ac.uk">https://greenfutures.exeter.ac.uk</a>.

---

By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Dangers of deep sea mining could soon be realized

Commercial deep sea mining is scheduled to begin within two...

In an effort to anticipate the future impacts of climate change, experts at <a href="https://www.asu.edu/">Arizona State University</a> are trying to gain a better understanding of extreme climate changes that occurred in the past. 

The researchers are describing abrupt climate changes, what led up to these “tipping points,” and the consequences that followed.

“We've been putting a lot of chemicals into the atmosphere and changing the heat of the atmosphere for a long time, and really intensively for 150 years,” said study co-author C. Michael Barton. 

“And, things are still chugging along. Temperatures are slowly going up globally, but we haven’t seen a huge, dramatic shift. However, complex systems are potentially vulnerable if you push too much.”

Barton studies the water cycle and other complex Earth systems, and looks at how drastically they have been altered by humans. 

“People tend to look at how far you can push things before suddenly everything changes. And that's what's considered the tipping point.”

Earth’s major systems include the hydrosphere (water), the atmosphere (air) and the cryosphere (ice). All of these systems are interconnected. 

The researchers focused their attention on tipping points across the history of these systems. They wanted to quantify small changes that can lead up to an abrupt, massive change, while also measuring how one abrupt change can trigger abrupt changes in other systems.

To understand what the planet was like hundreds of thousands of years ago, Earth system modelers turn to the prehistoric record that is available to them. This study, in particular, was focused on sediment cores from the Gulf of Alaska, dust records from North Africa, and ice cores from Greenland.

Scientists can also obtain prehistoric data from the ocean floor to measure changes in composition, circulation patterns, and influxes of fresh water from melting ice sheets.

The study authors point to past instances of extreme climate events that happened so quickly that humans either had difficulty adapting, or were not able to adapt.

For example, Europe experienced a period of abrupt cooling about 1,500 years ago, leading to major changes in vegetation. The researchers note that this cooling may have been caused by a natural phenomenon, such as volcanic activity. The changes were so extreme that people experienced famine and societal reorganization. 

According to the study authors, climate events that occurred centuries ago triggered drastic changes or even collapse in ancient civilizations due to unforeseen societal vulnerabilities.

In the ancient city Angkor, humans altered the natural water cycle by diverting water to grow crops. As the city grew, the water system became too strained and reached a tipping point. Ultimately, the city of Angkor collapsed.

In Arizona, the last few years have been hotter and drier than usual. Barton said it’s not yet clear whether we have passed a tipping point in the Southwest region of the country.

While fluctuations in precipitation and temperature occur naturally from year to year, looking at the ancient climate makes Barton wonder if the drier weather patterns have become the new normal for our lifetime.

Barton also noted that researchers still don’t know why some weather systems change. For example, past monsoon rains have shifted without warning and for unknown reasons. This can be catastrophic for people who depend on the monsoon season.

The researchers are calling for new Earth system models to simulate future abrupt changes, and for more research on the interactions between environmental systems and human societies during past climate change events.

The study authors hope this paper raises awareness of the field, and that more people will understand how analyzing the long-term past could help us in the near future.

One component of tipping points research is identifying early warning signals - smaller fluctuations in a system before an abrupt change. 

“All the components can change really, really fast,” said Barton. “The whole system can drop into a different state. How do we know when we're getting too close?”

The researchers say these warning signals exist, but when the entire world is the focus, it can be challenging to trace how small changes in one system can warn of an abrupt change in another.

“As humans, we try to anticipate the future," wrote the researchers. "We are now well aware that complex systems, including the coupled social and ecological systems that now dominate our planet, can undergo abrupt changes. If we cannot model abrupt change in the past, we cannot hope to predict them in the future.”

The study is published in the journal <a href="https://www.nature.com/ngeo/">Nature Geoscience</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

How much further can we push Earth before everything changes?

In an effort to anticipate the future impacts of climate...

The European Common Blue butterfly, Polyommatus icarus, was first recorded in Montreal, Québec in 2005. This species prefers to live in urban areas and its caterpillars depend on a host <a href="https://www.earth.com/news/tomato-fruit-warns-the-rest-of-the-plant-when-attacked/">plant</a> that is widespread throughout Canada. Given these circumstances, researchers at the <a href="https://www.uottawa.ca/en">University of Ottawa</a> felt it would be important to study the ecology of the blue butterflies.

The research began in 2017, at a time when the Canadian distribution of European Common Blues was restricted to southwestern Québec. The scientists were able to document the early colonization and spread of the newly-introduced species, providing insights into the process of invasion.

"The rate that animal and plant species are being introduced beyond their home ranges is increasing globally, but only a few of these species will become invasive – which means they are widespread, abundant, and have negative effects on ecological communities," explained study first author and PhD student Stephanie Rivest. 

"That's why it's so important for newly introduced species to be studied, like we did here, so that we can better understand and predict which introduced species are likely to become invasive."

The researchers found that the preferred food plant for P. icarus caterpillars is the bird’s-foot trefoil (Lotus corniculatus), which occurs throughout Canada. This means that there is the potential for these beautiful, blue-winged butterflies to invade the entire country as well. 

Apart from studying the ecology of European Common Blues, the researchers also marked over 4,500 individuals in order to monitor their movements, and measured the flight ability of P. icarus adults.

The team’s results show that the introduced species can reach very high densities compared to those of native butterflies. Although the blue butterflies are not the most competent fliers, they are able to disperse successfully. Observations entered by citizen scientists onto websites such as eButterfly and iNaturalist confirm that the species has spread at least as far as Toronto, over 400 km away from the study area.

"Building on our initial assessment of P. icarus, we need future studies to model the predicted trajectory of range expansion and to investigate other potentially important factors," said Dr. Heather Kharouba, the head of the lab where the research was conducted.

The study is published in the <a href="https://cdnsciencepub.com/loi/cjz">Canadian Journal of Zoology</a>.

---

By <a href="http://bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Blue butterflies are set to become widespread across Canada

The European Common Blue butterfly, Polyommatus icarus, was first recorded...

It has long been assumed that THC in hemp can increase due to environmental stress on the plant. But now, a new study from <a href="https://www.cornell.edu/">Cornell University</a> points to <a href="https://www.earth.com/news/the-gut-microbiome-is-strongly-shaped-by-genetics/">genetics</a> as the cause for greater or lesser THC production. 

The research has very real world consequences. Government regulators closely monitor levels of THC in hemp. If plants contain 0.3% THC or less, they’re classified as hemp, if they contain more, they’re said to test “hot.” When plants test hot, farmers can lose entire crops.  

“One of our goals in our research and in fulfilling our extension mission is to reduce the risks to growers as much as possible," explained study senior author Larry Smart.

"With this research, growers should feel some comfort that stresses do not seem to have a strong effect on changing the ratio of CBD to THC.”

To test whether or not environmental stress caused an increase in THC, researchers created five test plots of hemp. The plants were each exposed to a different stressor, such as physical damage, flooding, powdery mildew, or an herbicide. 

The plants were then tested for THC levels throughout a four week trial period as their flowers matured. 

“What we found over the weeks that we were sampling, the amounts of CBD and THC went up proportionately in all of these different cultivars for all of these different stresses," said study lead author Jacob Toth.

The study further proves that genetics, rather than environment, determine the THC content and CBD to THC ratios in hemp, said Smart.

According to the experts, further research is now needed to discover the specific genetic components that make up plants with low and high THC content. This could lead to methods of regulatory testing earlier in a plant’s life, before it actually reaches a high level of THC content.  

The study is published in the journal <a href="https://onlinelibrary.wiley.com/doi/10.1111/gcbb.12880">GCB Bioenergy</a>.

---

By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

&nbsp;

Genetics, not environmental stress, increases THC in hemp

It has long been assumed that THC in hemp can...

As global <a href="https://www.earth.com/news/clouds-have-an-amplifying-effect-on-global-warming/">warming</a> occurs and the climate starts to shift, researchers warn not to expect all of the same changes everywhere. A new study from the <a href="https://english.cas.cn/">Chinese Academy of Sciences</a> predicts that places which are already wet will generally receive more rainfall and more varied precipitation.

"As climate warms, climatologically wet regions will generally get wetter and dry regions get drier. Such a global pattern of mean rainfall change is often described as 'wet-get-wetter'. By analogy, the global pattern of rainfall variability change features a 'wet-get-more variable' paradigm,"explained study co-author Zhou Tianjun. 

Overall, this means that Earth environments are set to become more different from each other than they already are, as the planet becomes a more variable place. 

"The amplified rainfall variability manifests the fact that global warming is making our climate more uneven - more extreme in both wet and dry conditions, with wider and probably more rapid transitions between them," said study lead author Zhang Wenxia. 

These wild differences between different environments, as well as less predictable rainfall, will be very challenging for both human infrastructure and survival as well as for ecosystems everywhere. 

Study co-author Kalli Furtado hopes that having this information in hand will help future planning efforts but also acknowledges the hardships predicted, 

"This classification of different precipitation change regimes is valuable for regional adaptation planning," said Furtado.

"For most regions, the increasing rainfall variability, which could translate into impacts on crop yields and river flows, makes climate change adaptation more difficult."

As with so many things with climate change, we are not locked into any single future scenario. Humans still have time to try and mitigate climate change, and to plan for the realities that are ahead. 

The study is published in the journal <a href="https://advances.sciencemag.org/">Science Advances</a>.

---

By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Rainfall will become harder to predict with climate change

As global warming occurs and the climate starts to shift,...

Dengue fever is a potentially lethal disease of humans that is caused by a virus transmitted in the saliva of certain <a href="https://www.earth.com/news/mosquitoes-could-become-active-year-round/">mosquitoes</a>. Recent studies led by <a href="https://www.psu.edu/">Penn State</a> researchers have found that mosquitoes of the species Aedes aegypti that are infected with dengue virus are less tolerant of the higher temperatures associated with global warming. 

There is currently no cure for dengue fever in humans, and the disease kills around 40,000 people each year. In addition, Ae. aegypti mosquitoes are vectors of other human viral diseases, such as Zika, chikungunya and yellow fever.   

"Aided by increasing urbanization and climate change, this mosquito's range is expected to overlap with 50% of the world's population by 2050, dramatically increasing the number of people who could potentially be exposed to these viruses," said Professor Elizabeth McGraw.

In the past, scientists have tried to combat the spread of dengue virus by infecting Ae. aegypti mosquitoes with a biological control agent in the form of the bacterium Wolbachia pipientis. This microbe prevents viruses from multiplying inside the mosquito’s body. The infected mosquitoes are then released into the environment but cannot transmit dengue virus to humans. 

The heat sensitivity of dengue and Wolbachia-infected mosquitoes was tested by placing the insects into sealed vials which were then immersed in a hot water bath at 42oC. The researchers recorded how quickly the mosquitoes became immobilized on their backs and compared this with rates of death in uninfected control mosquitoes. 

The results showed that mosquitoes infected with dengue virus died three times more quickly than the controls. Mosquitoes infected with Wolbachia died at four times the rate of control mosquitoes, indicating that both pathogens, although not toxic to the hosts, caused some sort of immune stress response in the mosquitoes.

"You might expect that mosquitoes infected with both dengue virus and Wolbachia might become immobilized even faster than mosquitoes infected with only one or the other microbe, but we did not find an additive effect," said study lead author Fhallon Ware-Gilmore.

"We are, however, the first to show that viral infection can affect mosquito thermal tolerance, specifically by reducing mosquito survival during exposure to high heat. And, while there are some known interactions between heat and Wolbachia, particularly in immature stages, this is also the first study to show that adult infected-mosquitoes have reduced survival during heat stress."

According to Ware-Gilmore, the lack of mosquito thermal tolerance could help reduce transmission and potentially human disease incidence in hotter climate regions.

This is particularly relevant as the effects of global warming are felt throughout the world. However, these results also suggest that Wolbachia will no longer be a useful tool of biological control in the fight against the spread of dengue fever, given that it also increases the heat sensitivity of infected mosquitoes. 

The research is published in the journal <a href="https://journals.plos.org/plosntds/">PLOS Neglected Tropical Diseases</a>.

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By <a href="http://bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Global warming may slow the spread of dengue fever

Dengue fever is a potentially lethal disease of humans that...

Part of California’s plan to reach carbon neutrality by 2045 relies on natural ecosystems to absorb carbon. But now, new research from <a href="https://uci.edu/">UC Irvine</a> warns that climate change itself may hamper the ability of <a href="https://www.earth.com/news/satellite-data-reveals-vulnerable-tropical-forests-on-a-global-scale/">forests</a> and shrublands to take up carbon. 

The study, published in the journal <a href="https://agupubs.onlinelibrary.wiley.com/journal/2576604x">AGU Advances</a>, predicts that natural carbon storage in California will drop by 9 to 16 percent under varying scenarios. 

“This work highlights the conundrum that climate change poses to the state of California," said study lead author Shane Coffield.

"We need our forests and other plant-covered areas to provide a 'natural climate solution' of removing carbon dioxide from the air, but heat and drought caused by the very problem we're trying to solve could make it more difficult to achieve our objectives."

Despite an aggressive plan involving both artificial means of carbon sequestration and natural carbon sequestration by plants, it seems California may need to work even harder on emissions reduction to reach its carbon neutrality goal. 

"The emissions scenario that we follow will have a large effect on the carbon storage potential of our forests," said study co-author James Randerson.

"A more moderate emissions scenario in which we convert to more renewable energy sources leads to about half of the ecosystem carbon [sequestration] loss compared to a more extreme emissions scenario."

Unfortunately, climate models are not in agreement about the amount of precipitation in California’s future. However, the places most likely to lose carbon sequestration abilities are also some of the areas with large carbon offset projects. 

Overall, it seems the northern part of the state will become wetter, while the southern part becomes drier. Randerson says he hopes the research will be useful for planning.

"We hope that this work will inform land management and climate policies so that steps can be taken to protect existing carbon stocks and tree species in the most climate-vulnerable locations. Effective management of fire risk is essential for limiting carbon [sequestration] losses throughout much of the state."

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By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Reaching carbon neutrality will not be easy in California

Part of California’s plan to reach carbon neutrality by 2045...

The COVID-19 <a href="https://www.earth.com/news/ozone-pollution-dropped-dramatically-during-pandemic/">pandemic</a> gave us a small glimpse into a world where people traveled and consumed less. Unfortunately, the pandemic also showed scientists that even an enormous reduction in human consumption and fossil fuel use is not nearly enough to stop the climate crisis. 

Published in the journal <a href="https://academic.oup.com/bioscience">Bioscience</a>, new research by William J. Ripple and Christopher Wolf from <a href="https://oregonstate.edu/">Oregon State University</a> shows that although fossil fuel use dropped in 2020, the news is not good. 

Despite a major decrease in fossil fuel burning, concentrations of carbon dioxide, methane and nitrous oxide have reached record highs. Sea level rise, ocean temperatures, and the loss of ice mass have also hit disturbing records. 

The researchers explain that their study shows the inadequacy of a small drop in fossil fuel consumption as it relates to the climate crisis.

"The updated planetary vital signs we present largely reflect the consequences of unrelenting business as usual," said the study authors. "A major lesson from COVID-19 is that even colossally decreased transportation and consumption are not nearly enough and that, instead, transformational system changes are required."

The scientists claim that only large systematic changes have any chance of really combating the climate crisis, and they recommend a few specific shifts. 

The researchers suggest phasing out fossil fuels, and ultimately banning them altogether, along with climate education in schools to raise awareness. 

The team is also calling for the conservation of ecosystems that act as natural carbon sinks. The root problem, according to the scientists, is overconsumption and overexploitation of the planet. They criticize solutions that do not tackle the problem at its root.

“Policies to alleviate the climate crisis or any of the other threatened planetary boundary transgressions should not be focused on symptom relief but on addressing their root cause: the overexploitation of the Earth," wrote the researchers.

Only by facing the real basis of the problem the scientists remind us, will humanity have a chance at a sustainable future. 

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By <a href="http://zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Scientists issue new warning on climate crisis

The COVID-19 pandemic gave us a small glimpse into a...

Air pollution from common everyday products is killing up to ten times more people than what was previously realized, according to a new study from <a href="https://www.colorado.edu/">CU Boulder</a>. The experts report that pollutants sourced from vehicle fuels and chemical products, such as house paints, are responsible for hundreds of thousands of deaths every year. 

The researchers refer to the deadly air pollutants as “anthropogenic secondary organic aerosols," which form from chemicals that are regularly released through human activities. The team estimates that these secondary aerosols are linked to somewhere between 340,000 and 900,000 premature deaths each year. 

"That’s more than 10 times as many deaths as previously estimated,” said study co-author Benjamin Nault.

“The older idea was that to reduce premature mortality, you should target coal-fired power plants or the transportation sector."

“Yes, these are important, but we’re showing that if you’re not getting at the cleaning and painting products and other everyday chemicals, then you’re not getting at a major source.”

Direct sources of fine particle pollution (PM2.5), including power plants and diesel exhaust, are well documented. These sources of pollution are tied to at least three million premature deaths annually. 

The new study indicates that anthropogenic secondary organic pollutants serve as an indirect source of deadly fine particles. The chemicals are emitted from tailpipes and cooking fuels like charcoal. They are increasingly being used in house paints and cleaning products.

In previous work, a team of experts from CIRES and <a href="https://www.noaa.gov/">NOAA</a> found that volatile chemical products contribute as much as vehicles do to the formation of particle pollution. 

“What’s new here, is that we are showing this is an issue in cities on three continents, North America, Europe and east Asia," said study co-author Brian McDonald.

Professor Jose-Luis Jimenez noted that air quality regulations have tended to focus on volatile chemicals that produce ozone. The current investigation shows that chemicals in everyday products - which contribute little to ozone pollution - may still contribute to the formation of fine particle pollution in a major way. 

“Because this effect has been thought to be small, it hasn’t been targeted for control,” said Professor Jimenez. “But when you take atmospheric chemistry into account and put it into a model, you find that this particular source is killing a lot of people.”

“If you care about air pollution impacts on health and mortality, you have to take this problem seriously."

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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

Air pollution from everyday products is deadlier than previously realized

Air pollution from common everyday products is killing up to...

Scientists at the <a href="https://www.dri.edu/">Desert Research Institute</a> (DRI) have found that <a href="https://www.earth.com/news/new-coronavirus-identified-that-has-originated-in-dogs/">coronavirus</a> cases rose by nearly 18 percent in Reno last year after wildfire smoke persisted throughout the city. 

The study is part of a growing collection of research that links exposure to heavy wildfire smoke with a greater risk of becoming infected with the coronavirus. 

"Our results showed a substantial increase in the COVID-19 [the disease caused by the coronavirus] positivity rate in Reno during a time when we were affected by heavy wildfire smoke from California wildfires," said study lead author Daniel Kiser.

"This is important to be aware of as we are already confronting heavy wildfire smoke from the Beckwourth Complex Fire, and with COVID-19 cases again rising in Nevada and other parts of the western US."

The research raises concerns that the wildfire smoke currently blowing across the United States could cause a surge in coronavirus cases.

In northern California, ongoing wildfires have burned more than 190,000 acres. The fires corresponded with a recent spike in the state's coronavirus cases. Infections jumped by 43 percent in just 24 hours, increasing from 5,577 on July 22 to 7,984 on July 23.

The DRI team set out to investigate whether western wildfires in 2020 were linked to coronavirus cases in Reno. The researchers measured the amount of fine particle pollution circulating in the air as a result of wildfire smoke from May 15 to October 20.

Exposure to fine particle pollution (PM2.5) has been linked to an increased risk of catching a respiratory virus due to modified immune responses such as inflammation. According to the DRI scientists, PM 2.5 may also "enhance the spread and survival" of aerosols that carry the coronavirus.

The researchers compared levels of PM 2.5 in Reno to confirmed coronavirus cases in one of the city's hospitals. The results indicate that there was a three percent rise in coronavirus cases for every 10-microgram increase in PM 2.5 levels per cubic meter. 

"This corresponded to an estimated 17.7% increase in the number of cases during the time period most affected by wildfire smoke, from 16 Aug to 10 Oct," wrote the study authors.

The experts found that residents of Reno were exposed to higher levels of PM2.5 that persisted for longer periods of time compared to neighboring cities. During the study period, PM2.5 levels were elevated for 43 days in Reno versus 26 days in San Francisco.

"We had a unique situation here in Reno last year where we were exposed to wildfire smoke more often than many other areas, including the Bay Area," said study co-author Dr. Gai Elhanan. 

"We are located in an intermountain valley that restricts the dispersion of pollutants and possibly increases the magnitude of exposure, which makes it even more important for us to understand smoke impacts on human health."

"We believe our study greatly strengthens the evidence that wildfire smoke can enhance the spread of the coronavirus."

The study is published in the <a href="https://www.nature.com/jes/">Journal of Exposure Science and Environmental Epidemiology</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

Wildfire smoke could cause a surge in coronavirus cases

Scientists at the Desert Research Institute (DRI) have found 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

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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

[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 



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.

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

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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

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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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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



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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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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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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



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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



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Tracking changes in Earth's water cycle

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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



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Mysterious "spoke season" captured on Saturn

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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



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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



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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



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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



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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



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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



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Ocean heat influences regional climate

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the importance of monitoring the shape of the sea surface, which is constantly changing. These observations have many applications, such as ship routing, <a href="https://www.earth.com/news/the-modem-ocean-is-a-tough-place-for-whales-to-survive/">ocean</a> current forecasting, and debris tracking.



"A project supported by the Discovery element of ESA’s Basic Activities recently investigated a new technique to measure sea surface topography very precisely," reports ESA.



"The technique involves looking at satellite navigation (GNSS) signals that have been reflected off of the sea surface at very low angles. At these so-called grazing angles, waves and surface roughness have very little impact on the reflection process; the sea surface acts as a very smooth mirror."



Estel Cardellach is the principal investigator at the Institute for Space Studies of Catalonia, who first submitted the idea for the project.



“In a mirror-like reflection the phase of the signal can be tracked – it is continuous," said Cardellach. "Different surface heights result in different phase measurements. It gives a very precise measurement of the surface altitude at a few centimetres’ precision.”



The researchers developed a GNSS receiver and set up an experiment in the Balaeric Islands to collect signals from the receiver that were reflected off the sea surface. Ultimately, these signals will provide improved measurements of the shape of the sea surface.



Image/ Video 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

Monitoring the dynamic shape of the sea surface

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