Science – Page 17

Falling panel prices lead to global solar boom, except for the US

climate change, renewable energy, Science, solar power, syndication / Beth Washington / October 30, 2025

The economic case for solar power is stronger than ever.

White clouds drift over a combined wind-solar installation in Shandong province, China. Beijing’s support for a rapid rollout of solar and wind power forms a stark contrast with the growing antipathy of the Trump administration towards renewables. Credit: CFOTO/Future Publishing/Getty Images

To the south of the Monte Cristo mountain range and west of Paymaster Canyon, a vast stretch of the Nevada desert has attracted modern-day prospectors chasing one of 21st-century America’s greatest investment booms.

Solar power developers want to cover an area larger than Washington, DC, with silicon panels and batteries, converting sunlight into electricity that will power air conditioners in sweltering Las Vegas along with millions of other homes and businesses.

But earlier this month, bureaucrats in charge of federal lands scrapped collective approval for the Esmeralda 7 projects, in what campaigners fear is part of an attack on renewable energy under President Donald Trump. “We will not approve wind or farmer destroying [sic] Solar,” he posted on his Truth Social platform in August. Developers will need to reapply individually, slowing progress.

Thousands of miles away on the other side of the Pacific Ocean, it is a different story. China has laid solar panels across an area the size of Chicago high up on the Tibetan Plateau, where the thin air helps more sunlight get through.

The Talatan Solar Park is part of China’s push to double its solar and wind generation capacity over the coming decade. “Green and low-carbon transition is the trend of our time,” President Xi Jinping told delegates at a UN summit in New York last month.

China’s vast production of solar panels and batteries has also pushed down the prices of renewables hardware for everyone else, meaning it has “become very difficult to make any other choice in some places,” according to Heymi Bahar, senior analyst at the International Energy Agency.

In 2010, the IEA estimated that there would be 410 gigawatts (GW) of solar panels installed around the world by 2035. There is already more than four times that capacity, with about half of it in China.

Many countries in Africa and the Middle East, even in petrostates such as Saudi Arabia, are rapidly developing solar power. “It’s a very cheap way to harness the sun,” says Kingsmill Bond, an energy strategist at think-tank Ember.

chart showing global renewables growth — Credit: FT

Its analysis suggests that, helped by rapid growth in solar and wind energy, renewables generated more electricity than coal-fired power plants during the first half of this year.

Progress in energy and other areas has damped some of the pessimism around global warming. In 2015, the UN predicted temperatures would rise by 4° C compared to pre-industrial levels by 2100. It now projects a rise of 2.6° C, if climate policies are followed through.

But for delegates set to gather in Belém, Brazil, next month for the COP30 climate summit, any jubilation will be tempered by the knowledge that the renewables revolution is a long way from being fulfilled. Emissions from the energy sector rose for the fourth straight year in 2024 to a record high, while the slower growth in US renewables means an ambitious target to triple global capacity by 2030 will probably be missed.

“It’s not job done, [IEA analysis] does throw some genuine caution out there,” says Mike Hemsley, deputy director at the Energy Transitions Commission think-tank.

Renewable energy has lowered wholesale power costs, but that has not necessarily fed through into the prices that consumers pay, while users in many countries have not yet switched to electricity for things like transport and domestic heating in the numbers required to reduce fossil fuel usage.

Calculations by the Energy Institute, the sector’s global body, show that the supply of oil, gas, and coal for energy—electricity generation, heating, industrial usage, and transport—in 2024 rose by more than the supply of energy from low-carbon sources, which also includes nuclear and hydropower. That has led some to argue that renewables are merely helping to meet climbing energy demand, rather than replacing fossil fuels.

“The world remains in an energy addition mode, rather than a clear transition,” said Andy Brown, president of the institute, as it launched its report in August.

“Renewables is the place to be”

At a solar farm operated by ReNew, one of India’s biggest green energy companies, hundreds of panels glint in the sharp desert sun of surrounding Rajasthan.

India, the world’s third largest carbon emitter, wants to develop 500 gigawatts of clean-energy capacity by 2030, and earlier this year reached 243 GW—meaning more than half of its current installed power capacity is now from renewables.

“Every group in India is now saying: ‘You know what, renewables is the place to be,” says Sumant Sinha, chair and chief executive of ReNew.

Saudi Arabia, blessed with both oil and sun, has developed around 4.34 GW of solar capacity as it tries to free up more oil for export, rather than burning it in its own power stations. It wants to build up to 130 GW by the end of the decade.

“It’s massive, what’s going on,” Marco Arcelli, chief executive of utility ACWA Power, which is part-owned by the kingdom’s sovereign wealth fund, told the FT earlier this year. The company is developing 30 GW of renewables in Saudi Arabia.

South Africa has authorized at least 6 GW of renewable energy capacity since President Cyril Ramaphosa removed the capacity limit on private electricity providers in 2022, breaking years of reluctance among the ruling African National Congress to challenge the dominance of state monopoly utility Eskom.

factory workers — Workers at the Ener-G-Africa factory in Cape Town test LED lights on solar panels. South Africans are increasingly installing such panels because of the unreliability of normal power supplies. Credit: Esa Alexander/Reuters

Middle-class households in the country have also rapidly installed solar panels on their roofs to cope with years of planned rolling blackouts due to power shortages. It is part of a worldwide trend for smaller installations as homes and businesses tire of waiting for governments or big utilities to fix power shortages.

Solar panel installations of less than 1MW accounted for about 42 percent of global installations last year, according to BloombergNEF, almost double the 22 percent recorded in 2015. Factories, mosques, and farms in Pakistan have covered their roofs in Chinese-made solar panels to try to avoid surging tariffs for state-provided power.

“We’ve displaced tens of thousands of diesel generators,” says William Brent, chief marketing officer at Husk Power Systems, which has installed about 400 “mini-grids” of solar and batteries across Nigeria and India. These are helping pharmacies store medicines and shopkeepers keep drinks cool at around half the cost of power from the grid.

The construction of vast solar arrays in deserts and small installations on rooftops have largely been driven by the same underlying trend: falling costs. The huge surfeit of production capacity in China, which produced about eight out of 10 of the world’s solar modules in 2024, has pushed the cost of panels down by almost 90 percent over the past decade and dragged overall capital expenditure costs down 70 percent, according to analysts.

Yet even in places like India, fossil fuels still hold sway. Coal still generates more than 70 percent of the country’s power output and remains politically protected, employing hundreds of thousands directly and many more indirectly in some of India’s poorest regions. “India still has a massive way to go,” says Hemsley at the ETC.

PM Prasad, chair of state-owned Coal India, told the FT earlier this year that it was reopening more than 30 mines and launching up to five new sites, arguing that renewables were not yet capable of meeting fast-growing energy demand.

The painful process of acquiring large tracts of land for solar arrays in a country with millions of smallholder farmers has also led to delays across the renewables sector, many Indian developers grumble. More than 50 GW of renewable power projects are waiting to connect to an overstretched transmission network, estimates the Institute for Energy Economics and Financial Analysis, a think-tank, and cleantech consultancy JMK Research.

Chart showing relative amount of small solar installations — Credit: FT

Even as solar panels become more popular in Sub-Saharan Africa, millions of homes and businesses still rely on expensive and polluting diesel generators, and roughly 600 million people lack access to power.

Many people also lack the means to pay commercial rates for electricity, even before factoring in the extra levies needed to finance the cost of new transmission lines, a key enabler of renewables projects around the world.

Electricity storage capabilities also need to dramatically improve if countries want to rely more heavily on intermittent wind and solar farms and phase out backup fossil-fuel capacity.

Large-scale batteries are being deployed rapidly—spurred again by China’s prolific manufacturing output. James Mittell, director at developer Actis Energy, says costs have fallen so much that it is already possible in many markets to build large-scale battery and solar systems, which can deliver power with similar consistency to gas-fired power plants, but at lower cost. “It’s a complete game-changer,” he says.

But progress is also mixed on the second phase of any “transition” to renewable power: persuading consumers and industries to switch to equipment that runs on electricity rather than combustion processes using fossil fuels.

The share of electricity in final energy demand has flatlined in the US and the EU over the past few years, with the growth of electric cars offset by the difficulty of getting people to switch away from gas or oil heating systems to low-carbon electric ones such as heat pumps.

“For electricity [generation] we have a success story,” says Bahar, at the IEA. “For other sectors, it’s way more complicated.”

Massive growth in China

China and some parts of Southeast Asia stand out in terms of the portion of energy supplied by electricity increasing—in China’s case, from about 12 percent in 2000 to about 30 percent in 2023—as millions of citizens start driving electric cars and factories switch away from fossil-fueled boilers.

Ember points to data showing that renewables met 84 percent of China’s new electricity demand last year as evidence that coal-powered generation in the country is nearing its peak. “We’re confident renewables can meet all China’s [power] demand growth,” adds Hemsley at the ETC.

But even here, challenges loom. Major electricity market reforms introduced by Beijing in July mean renewable energy developers no longer get a fixed price akin to that received by coal-fired generators and are instead more exposed to market forces.

“They clearly don’t want to harm the build out of renewables, but they just want it to be done on a more commercial basis,” says Neil Beveridge, who leads Bernstein’s energy analysis in Hong Kong.

But the IEA warns it will lower returns and cut the growth of renewables. “That [impact of the reform] is the biggest uncertainty in our outlook,” adds Bahar at the IEA.

A far sharper slowdown is already underway in the US, where incentives introduced as part of former President Joe Biden’s Inflation Reduction Act in 2022 are rolled back by the second Trump administration. Tax credits have been cut and major projects blocked—spooking investors and leaving existing developers trying to stay afloat.

workers carrying solar panels — Workers carry solar panels for a project in Lingwu, China. The country accounts for half the world’s installed solar capacity, but its fossil fuel usage also continues to grow. Credit: Sara Hussein/AFP/Getty Images

“It’s very difficult to make big capital decisions based on this,” says Reagan Farr, chief executive of Silicon Ranch, a solar developer. “We don’t have a bipartisan energy policy in the US, which is very bad for the industry and our economy.”

Ørsted, the world’s largest offshore wind company, has had to raise an extra $9 billion from investors after Trump’s hostility to the offshore wind sector prevented it from selling a stake in one of its major US projects.

His tariffs on products from China mean higher costs for solar projects. Analysts say more large-scale solar projects are likely to have their permits revoked or reviewed.

Developers are currently rushing to build, as they have until July 2026 to start construction to capture the tail-end of the tax credits. But some projects and companies are bound to fail. “We’re likely facing several more years of uphill battles for many large-scale projects,” says Abby Watson, president at Groundwire Group, a consultancy.

The IEA has halved its forecast for renewables growth by 2030 in the US to around 250 GW as a result of Trump’s policies. Analysts at Carbon Brief estimate the country will emit 7 billion tonnes more CO₂ equivalent by 2030 under Trump’s policies than if the country had met its obligations under the 2015 Paris agreement, which he is withdrawing from.

The reduction in renewables growth comes as the country’s electricity demand is rising due to the growth of data centers, many of which are looking to gas-fired or nuclear power stations because they need constant, steady power.

Gas turbine makers are struggling to keep up with demand, while new nuclear power plants are often delayed.

chart showing continued growth of fossil fuels — Credit: FT

Retail electricity prices have already risen by 5 percent since July, according to the Energy Information Administration, and some experts caution they could rise further if supplies are constrained. “The writing is on the wall,” says Pol Lezcano, director of energy and renewables at the CBRE real estate group.

Supporters of renewable electricity argue that the US is missing out on a revolution in cleaner, cheaper technology sweeping the world, with some likening it to the aging cars on Cuba’s roads.

But the relationship between renewable generation and consumer energy bills is complicated. The free energy from the sun or the wind means that the wholesale price of renewable-generated power is lower, but developers still need to make a return on their investment, and grid operators may need to step in to ensure continuity of supply when the wind and the sun are low.

“Even as the cost of producing electricity from renewables falls, consumers may not see immediate or proportional reductions in their bills, raising questions over the impact of renewables on power affordability,” the IEA said in its latest report.

More broadly, the US’s focus on fossil fuels and pullback of support for clean energy further cedes influence over the future global energy system to China.

The US is trying to tie its trading partners into fossil fuels, pressing the EU to buy $750 billion of American oil, natural gas, and nuclear technologies during his presidency as part of a trade deal, scuppering an initiative to begin decarbonizing world shipping and pressuring others to reduce their reliance on Chinese technology.

But the collapsing cost of solar panels in particular has spoken for itself in many parts of the world. Experts caution that the US’s attacks on renewables could cause lasting damage to its competitiveness against China, even if an administration more favorable to renewables were to follow Trump’s.

“China has run far away in terms of competitiveness,” says Antonio Cammisecra, chief executive of ContourGlobal, an independent power producer.

“The US is capable of rebuilding, but it will take time.”

Additional reporting by Ahmed Al Omran and David Pilling. Data visualization by Jana Tauschinski.

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The chemistry behind that pricey cup of civet coffee

chemistry, coffee, Food science, kopi luwak, Science / DJ Henderson / October 29, 2025

A sampling of scat

Kopi luwak is quite popular, with well-established markets in several South and East Asian countries. Its popularity has risen in Europe and the US as well, and India has recently become an emerging new market. Since there haven’t been similar studies of the chemical properties of kopi luwak from the Indian subcontinent, the authors of this latest study decided to fill that scientific gap. They focused on civet coffee produced in Kodagu, which produces nearly 36 percent of India’s total coffee production.

The authors collected 68 fresh civet scat samples from five different sites in Kodagu during peak fruit harvesting in January of this year. Collectors wore gloves to avoid contamination of the samples. For comparative analysis, they also harvested several bunches of ripened Robusta coffee berries. They washed the scat samples to remove the feces and also removed any palm seeds or other elements to ensure only Robusta beans remained.

For the manually harvested berries, the authors removed the pulp after a natural fermentation process and then sun-dried the beans for seven days. They then removed the hulls of both scat-derived and manually harvested berries and dried the beans in an oven for two hours. None of the bean samples were roasted, since roasting might significantly alter the acidity and chemical composition of the samples. For the chemical analysis, 10 distinct samples (five from each site where berries were collected) were ground into powder and subjected to various tests.

The civet beans had higher fat levels, particularly those compounds known to influence aroma and flavor, such as caprylic acid and methyl esters—contributing to kopi luwak’s distinctive aroma and flavor—but lower levels of caffeine, protein, and acidity, which would reduce the bitterness. The lower acidity is likely due to the coffee berries being naturally fermented in the civets’ digestive tracts, and there is more to learn about the role the gut microbiome plays in all of this. There were also several volatile organic compounds, common to standard coffee, that were extremely low or absent entirely in the civet samples.

In short, the comparative analysis “further supports the notion that civet coffee is chemically different from conventionally produced coffee of similar types, mainly due to fermentation,” the authors concluded. They recommend further research using roasted samples, along with studying other coffee varieties, samples from a more diverse selection of farms, and the influence of certain ecological conditions, such as canopy cover and the presence of wild trees.

Scientific Reports, 2025. DOI: 10.1038/s41598-025-21545-x (About DOIs).

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NASA races to keep Artemis II on schedule, even when workers aren’t being paid

artemis, artemis II, human spaceflight, Lockheed Martin, NASA, nasa budget, Science, Space / Kelly Newman / October 29, 2025

“The Office of Procurement has sent letters to contractors doing excepted work (including all the Artemis II contractors) indicating that work is authorized during the lapse in funding,” the official said. “Most workers have indicated a willingness to continue the work in the event of contract funding running out prior to the government reopening.”

Working on borrowed time

Several months of work remain ahead for the Artemis II team to finish testing the SLS rocket and Orion spacecraft, complete training of the astronauts and flight control teams, and then transfer the entire 322-foot-tall (98-meter) launch vehicle out to Launch Complex 39B for a fueling demonstration and launch countdown.

Thousands of workers across the country, primarily in Florida, Texas, and Alabama, are still reporting for duty to keep Artemis II’s launch date early next year. In many cases, they’re not getting their paychecks.

Even while work continues, the government shutdown is creating inefficiencies that, if left unchecked, will inevitably impact the Artemis II schedule. Just look at what’s happening with air traffic controllers across the United States as many of them are forced to take second jobs due to missed paychecks. The funding stalemate has contributed to widespread air traffic controller shortages and flight delays.

NASA astronaut and Artemis II pilot Victor Glover speaks to the press during an Artemis media event in the Vehicle Assembly Building at Kennedy Space Center, Florida, on December 16, 2024. Credit: Miguel J. Rodriguez Carrillo / AFP via Getty Images

Kirk Shireman, vice president and program manager for Orion at Lockheed Martin, said Tuesday that the shutdown initially created a “nuisance” for teams working on the Artemis II mission. But it won’t be just a nuisance forever.

“I do think we’re rapidly approaching the point where it will be a significant impact, and it’s more to do with overall infrastructure,” Shireman said in response to a question from Ars at the von Braun Space Exploration Symposium in Huntsville, Alabama.

“Some of you flew here,” he said. “I suspect if you weren’t delayed coming here, you’re probably going to be delayed going home, even in the airport going through TSA. Everything that affects people’s lives is affected by the government, and when it’s shut down, it’s going to have its toll, and it’s probably going to be these secondary impacts that ultimately do it.”

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Westinghouse is claiming a nuclear deal would see $80B of new reactors

Energy, nuclear energy, nuclear power, reactors, Science, Westinghouse / DJ Henderson / October 29, 2025

On Tuesday, Westinghouse announced that it had reached an agreement with the Trump administration that would purportedly see $80 billion of new nuclear reactors built in the US. And the government indicated that it had finalized plans for a collaboration of GE Vernova and Hitachi to build additional reactors. Unfortunately, there are roughly zero details about the deal at the moment.

The agreements were apparently negotiated during President Trump’s trip to Japan. An announcement of those agreements indicates that “Japan and various Japanese companies” would invest “up to” $332 billion for energy infrastructure. This specifically mentioned Westinghouse, GE Vernova, and Hitachi. This promises the construction of both large AP1000 reactors and small modular nuclear reactors. The announcement then goes on to indicate that many other companies would also get a slice of that “up to $332 billion,” many for basic grid infrastructure.

So the total amount devoted to nuclear reactors is not specified in the announcement or anywhere else. As of the publication time, the Department of Energy has no information on the deal; Hitachi, GE Vernova, and the Hitachi/GE Vernova collaboration websites are also silent on it.

Meanwhile, Westinghouse claims that it will be involved in the construction of “at least $80 billion of new reactors,” a mix of AP1000 and AP300 (each named for the MW of capacity of the reactor/generator combination). The company claims that doing so will “reinvigorate the nuclear power industrial base.”

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Melissa strikes Jamaica, tied as most powerful Atlantic storm to come ashore

hurricane, jamaica, melissa, Science / Beth Washington / October 28, 2025

Hurricane Melissa made landfall in southwestern Jamaica, near New Hope, on Tuesday at 1 pm ET with staggeringly powerful sustained winds of 185 mph.

In the National Hurricane Center update noting the precise landfall time and location, specialist Larry Kelly characterized Melissa as an “extremely dangerous and life-threatening” hurricane. Melissa is bringing very heavy rainfall, damaging surge, and destructive winds to the small Caribbean island that is home to about 3 million people.

The effects on the island are sure to be catastrophic and prolonged.

A record-breaking hurricane by any measure

By any measure Melissa is an extraordinary and catastrophic storm.

By strengthening overnight, and then maintaining its incredible intensity of 185 mph, Melissa has tied the Labor Day Hurricane of 1935 as the most powerful hurricane to strike a landmass in the Atlantic Basin, which includes the United States, Mexico, Central America, and the Caribbean islands.

Melissa also tied the Labor Day storm, which struck the Florida Keys, as the most intense storm at landfall as measured by central pressure, 892 millibars.

Overall Melissa is tied for the second strongest hurricane, measured by winds, ever observed in the Atlantic basin, behind only Hurricane Allen and its 190 mph winds in 1980. Only Hurricane Wilma (882 millibars) and Gilbert (888 millibars) have recorded lower pressures at sea.

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Why imperfection could be key to Turing patterns in nature

animals, Biology, Science, Turing mechanism, Turing patterns / 9u50fv / October 27, 2025

In essence, it’s a type of symmetry breaking. Any two processes that act as activator and inhibitor will produce periodic patterns and can be modeled using Turing’s diffusion function. The challenge is moving from Turing’s admittedly simplified model to pinpointing the precise mechanisms serving in the activator and inhibitor roles.

This is especially challenging in biology. Per the authors of this latest paper, the classical approach to a Turing mechanism balances reaction and diffusion using a single length scale, but biological patterns often incorporate multiscale structures, grain-like textures, or certain inherent imperfections. And the resulting patterns are often much blurrier than those found in nature.

Can you say “diffusiopherosis”?

Simulated hexagon and stripe patterns obtained by diffusiophoretic assembly of two types of cells on top of the chemical patterns. Credit: Siamak Mirfendereski and Ankur Gupta/CU Boulder

In 2023, UCB biochemical engineers Ankur Gupta and Benjamin Alessio developed a new model that added diffusiopherosis into the mix. It’s a process by which colloids are transported via differences in solute concentration gradients—the same process by which soap diffuses out of laundry in water, dragging particles of dirt out of the fabric. Gupta and Alessio successfully used their new model to simulate the distinctive hexagon pattern (alternating purple and black) on the ornate boxfish, native to Australia, achieving much sharper outlines than the model originally proposed by Turing.

The problem was that the simulations produced patterns that were too perfect: hexagons that were all the same size and shape and an identical distance apart. Animal patterns in nature, by contrast, are never perfectly uniform. So Gupta and his UCB co-author on this latest paper, Siamak Mirfendereski, figured out how to tweak the model to get the pattern outputs they desired. All they had to do was define specific sizes for individual cells. For instance, larger cells create thicker outlines, and when they cluster, they produce broader patterns. And sometimes the cells jam up and break up a stripe. Their revised simulations produced patterns and textures very similar to those found in nature.

“Imperfections are everywhere in nature,” said Gupta. “We proposed a simple idea that can explain how cells assemble to create these variations. We are drawing inspiration from the imperfect beauty of [a] natural system and hope to harness these imperfections for new kinds of functionality in the future.” Possible future applications include “smart” camouflage fabrics that can change color to better blend with the surrounding environment, or more effective targeted drug delivery systems.

Matter, 2025. DOI: 10.1016/j.matt.2025.102513 (About DOIs).

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Melissa set to be the strongest hurricane to ever strike Jamaica

hurricanes, jamaica, melissa, Science, Weather / Shannon Garcia / October 27, 2025

The sole bright spot is that, as of Monday, the core of the storm’s strongest winds remains fairly small. Based on recent data, its hurricane-force winds only extend about 25 miles from the center. Unfortunately, Melissa will make a direct hit on Jamaica, with the island’s capital city of Kingston to the right of the center, where winds and surge will be greatest.

Beyond Jamaica, Melissa will likely be one of the strongest hurricanes on record to hit Cuba. Melissa will impact the eastern half of the island on Tuesday night, bringing the trifecta of heavy rainfall, damaging winds, and storm surge. The storm also poses lesser threats to Hispaniola, the Bahamas, and potentially Bermuda down the line. There will be no impacts in the United States.

A sneakily strong season

Most US coastal residents will consider this Atlantic season, which officially ends in a little more than a month, to be fairly quiet. There have been relatively few direct impacts to the United States from named storms.

One can see the signatures of Erin, Humberto, and Melissa in this chart of Accumulated Cyclone Energy for 2025. Credit: CyclonicWx.com

But this season has been sneakily strong. Melissa is just the 45th storm since 1851 to reach Category 5 status, as defined as having sustained winds of 157 mph or greater. Already this year, Erin and Humberto reached Category 5 status, and now Melissa is the third such hurricane. Fortunately, the former two storms posed minimal threat to land.

Before this year, there had only ever been one season with three Category 5 hurricanes on record: 2005, which featured three storms that all impacted US Gulf states and had their names retired, Katrina, Rita, and Wilma.

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Whale and dolphin migrations are being disrupted by climate change

dolphins, marine environment, marine life, Migration Assistant, Science, syndication, whales / 9u50fv / October 25, 2025

Marine mammals are being forced into new and more dangerous waters, scientists warn.

Credit: Martin van Aswegen/NOAA

For millennia, some of the world’s largest filter-feeding whales, including humpbacks, fin whales, and blue whales, have undertaken some of the longest migrations on earth to travel between their warm breeding grounds in the tropics to nutrient-rich feeding destinations in the poles each year.

“Nature has finely tuned these journeys, guided by memory and environmental cues that tell whales when to move and where to go,” said Trisha Atwood, an ecologist and associate professor at Utah State University’s Quinney College of Agriculture and Natural Resources. But, she said, climate change is “scrambling these signals,” forcing the marine mammals to veer off course. And they’re not alone.

Earlier this year, Atwood joined more than 70 other scientists to discuss the global impacts of climate change on migratory species in a workshop convened by the United Nations Convention on the Conservation of Migratory Species of Wild Animals. The organization monitors and protects more than 1,000 species that cross borders in search of food, mates, and favorable conditions to nurture their offspring.

More than 20 percent of these species are on the brink of extinction. It was the first time the convention had gathered for such a purpose, and their findings, published this month in a report, were alarming.

“Almost no migratory species is untouched by climate change,” Atwood said in an email to Inside Climate News.

From whales and dolphins, to arctic shorebirds and elephants, all are affected by rising temperatures, extreme weather, and shifting ecosystems, which are disrupting migratory routes and reshaping critical habitats across the planet.

Asian elephants, for instance, are being driven to higher ground and closer to human settlements as they search for food and water amidst intensifying droughts, fueling more frequent human-elephant conflicts, the report found. Shorebirds are reaching their Arctic breeding grounds out of sync with the insect blooms their chicks depend on to survive.

The seagrass meadows that migrating sea turtles and dugongs feed on are disappearing due to warmer waters, cyclones, and sea level rise, according to the report. To date, around 30 percent of the world’s known seagrass beds have been lost, threatening not only the animals that depend on them, but also humans. These vital ecosystems store around 20 percent of the world’s oceanic carbon, in addition to supporting fisheries and protecting coastlines.

Together, these examples reveal how climate change is tipping the delicate balance migratory species have long relied on to survive.

“Climate change is disrupting this balance by altering when and where resources appear, how abundant they are, the environmental conditions species must endure, and the other organisms they interact with, reshaping entire networks of predators and competitors,” Atwood said.

Especially among marine life.

On the United States’ West Coast, for instance, Atwood said, warming waters are pushing juvenile great white sharks out of their traditional southern habitats. This shift has led to a sharp rise in sea otter deaths in Monterey Bay, California, where they are increasingly getting bitten by the sharks.

Whales and dolphins are particularly vulnerable species as rising temperatures threaten both their prey and their habitat, according to the report.

Heatwaves in the Mediterranean are projected to reduce suitable habitat for endangered fin whales by up to 70 percent by mid-century as their prey dwindles or moves due to rising temperatures. In some places, such as the Northern Adriatic Sea, hotter temperatures may eventually prove intolerable for bottlenose dolphins. “Rising water temperatures could exceed the species’ physiological tolerance,” the report says, which also acknowledges that this is already happening in other parts of the world, such as the Amazon River.

In 2023, more than 200 river dolphins, which migrate seasonally between tributaries and lagoons in the Amazon, died due to record-high temperatures, along with much of their prey. In some areas, their shallow aquatic habitats exceeded 100 degrees Fahrenheit. “The river systems were unusually empty and dry and the animals got isolated,” said Mark Simmonds, scientific councilor for marine pollution for the U.N. convention, who led some of the discussions around climate change impacts on cetaceans at the workshop in February. “They lost the water that they would have been living in.”

Loss of prey in traditional habitats is of particular concern for migrating marine mammals that are forced to follow their prey into new, and sometimes more perilous, waters.

This is particularly evident in the case of critically endangered North Atlantic Right whales, which the report says are especially prone to ship strikes and entanglement in fishing gear as they pursue their prey—tiny crustaceans called copepods—which are moving toward cooler waters. There are fewer than 400 of the whales left.

The North Pacific humpback whales that feed off the coast of California are also at risk.

According to the report, these whales have experienced significant changes in their migratory routes due to climate-driven shifts, which has resulted in many getting entangled in dungeness crab fishing gear.

While it is not completely clear what is driving these shifts, Ari Friedlaender, an ecologist and professor at the University of California, Santa Cruz, who monitors whale migrations and did not attend the convention’s workshop, said it could be that changing ocean conditions may be pushing the whales’ prey closer to shore.

“The timing of when these animals migrate now puts them in overlap with that fishery, whereas [previously] they would have migrated through that same area, but at a different time of year,” he said.

In some places, such as the Southern Ocean, Freidlaender said he is especially concerned about the overall availability of prey needed to sustain the whales that feed there. “The food is limited in Antarctica.”

Ideally, migrating whales arrive at their polar feeding grounds right around the same time that krill, their preferred prey, are swarming in massive aggregations in response to phytoplankton blooms, which the little creatures feed on. This synchronicity allows the whales to gorge for several months while building the fat reserves they need to survive long stretches of time that they will go without food as they migrate back to their breeding grounds to mate and calve. But warmer temperatures and melting sea ice are disrupting these cycles.

Krill blooms in polar regions are weakening, peaking earlier, or failing to materialize altogether, Atwood said.“Increasingly, whales reach their feeding grounds to find krill stocks depleted.” This, in turn, forces the whales to travel even greater distances in search of sustenance. But it doesn’t always mean they find it.

“There may not even be an opportunity to go to a place where there is more food,” said Friedlaender.

Krill thrive in icy environments. They graze on algae growing on the underbelly of sea ice, which also provides a nursery-like environment for krill larvae to grow safely without being preyed upon. But as this sea ice disappears, some krill are leaving their traditional habitats and moving towards colder waters. Others are vanishing altogether. In some years, where there’s less sea ice, Friedlaender said, “There’s just not enough food around.”

As a result, it’s becoming more common to see some of the world’s largest whales, including humpbacks, showing up in tropical breeding grounds “looking very skinny,” Simmonds said.

This can have significant repercussions on their health, Friedlaender said, including their ability to reproduce. “It could have those sort of cascading impacts of really changing the dynamics of how that population grows.”

To conserve whales and other migratory marine life, Friedlaender said, static protections such as implementing marine protected areas are not enough. Instead, he said, dynamic management strategies must be created and implemented that help protect the animals as they move, such as real-time monitoring of whale movements, shifting shipping lanes or requiring vessel speed limits when whales are present, as well as stricter fishing regulations in key habitats. Ongoing research into how climate change is reshaping animal migrations around the world is also critical, Atwood said, not only to safeguard the species themselves but to protect the ecosystems they help sustain.

“Because these animals are so uniquely adapted to move across huge swaths of land and oceans, oblivious to political borders, the solutions must be just as dynamic, far-reaching, and borderless,” she said. “Effective responses therefore require an integrated understanding of projected climatic and habitat changes, species’ ecologies and behavioral responses, and mechanisms for fostering international cooperation.”

This article originally appeared on Inside Climate News, a nonprofit, non-partisan news organization that covers climate, energy, and the environment. Sign up for their newsletter here.

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Clinical trial of a technique that could give everyone the best antibodies

antibodies, Biology, DNA, electroporation, medicine, plasmid, Policy, Science / DJ Henderson / October 25, 2025

If we ID the DNA for a great antibody, anyone can now make it.

One of the things that emerging diseases, including the COVID and Zika pandemics, have taught us is that it’s tough to keep up with infectious diseases in the modern world. Things like air travel can allow a virus to spread faster than our ability to develop therapies. But that doesn’t mean biotech has stood still; companies have been developing technologies that could allow us to rapidly respond to future threats.

There are a lot of ideas out there. But this week saw some early clinical trial results of one technique that could be useful for a range of infectious diseases. We’ll go over the results as a way to illustrate the sort of thinking that’s going on, along with the technologies we have available to pursue the resulting ideas.

The best antibodies

Any emerging disease leaves a mass of antibodies in its wake—those made by people in response to infections and vaccines, those made by lab animals we use to study the infectious agent, and so on. Some of these only have a weak affinity for the disease-causing agent, but some of them turn out to be what are called “broadly neutralizing.” These stick with high affinity not only to the original pathogen, but most or all of its variants, and possibly some related viruses.

Once an antibody latches on to a pathogen, broadly neutralizing antibodies inactivate it (as their name implies). This is typically because these antibodies bind to a site that’s necessary for a protein’s function. For example, broadly neutralizing antibodies to HIV bind to the proteins that help this virus enter immune cells.

Unfortunately, not everyone develops broadly neutralizing antibodies, and certainly doesn’t do so in time to prevent infections. And we haven’t figured out a way of designing vaccinations that ensure their generation. So we’re often found ourselves stuck with knowing what antibodies we’d like to see people making while having no way of ensuring that they do.

One of the options we’ve developed is to just mass-produce broadly neutralizing antibodies and inject them into people. This has been approved for use against Ebola and provided an early treatment during the COVID pandemic. This approach has some practical limitations, though. For starters, the antibodies have a finite life span in the bloodstream, so injections may need to be repeated. In addition, making and purifying enough antibodies in bulk isn’t the easiest thing in the world, and they generally need to be kept refrigerated during the distribution, limiting the areas where they can be used.

So, a number of companies have been looking at an alternative: getting people to make their own. This could potentially lead to longer-lived protection, even ensuring the antibodies are present to block future infections if the DNA survives long enough.

Genes and volts

Once you identify cells that produce broadly neutralizing antibodies, it’s relatively simple to clone those genes and put them into a chunk of DNA that will ensure that they’ll be produced by any human cell. If we could get that DNA into a person’s cells, broadly neutralizing antibodies are the result. And a number of approaches have been tried to handle that “if.” Most of them have inserted the genes needed to make the antibodies into a harmless, non-infectious virus, and then injected that virus into volunteers. Unfortunately, these viruses have tended to set off a separate immune response, which causes more significant side effects and may limit how often this approach can be used.

This brings us to the technique being used here. In this case, the researchers placed the antibody genes in a circular loop of DNA called a plasmid. This is enough to ensure that the DNA doesn’t get digested immediately and to get the antibody genes made into proteins. But it does nothing to help get the DNA inside of cells.

The research team, a mixture of people from a biotech company and academic labs, used a commercial injection setup that mixes the injection of the DNA with short pulses of electricity. The electricity disrupts the cell membrane, allowing the plasmid DNA to make it inside cells. Based on animal testing, doing this in muscle cells is enough to turn the muscles into factories producing lots of broadly neutralizing antibodies.

The new study was meant to test the safety of doing that in humans. The team recruited 44 participants, testing various doses of two antibody-producing plasmids and injection schedules. All but four of the subjects completed the study; three of those who dropped out had all been testing a routine with the electric pulses happening very quickly, which turned out to be unpleasant. Fortunately, it didn’t seem to make any difference to the production of antibodies.

While there were a lot of adverse reactions, most of these were associated with the injection itself: muscle pain at the site, a scab forming afterward, and a reddening of the skin. The worst problem appeared to be a single case of moderate muscle pain that persisted for a couple of days.

In all but one volunteer, the injection resulted in stable production of the two antibodies for at least 72 weeks following the injection; the single exception only made one of the two. That’s “at least” 72 weeks because that’s when they stopped testing—there was no indication that levels were dropping at this point. Injecting more DNA led to more variability in the amount of antibody produced, but that amount quickly maxed out. More total injections also boosted the level of antibody production. But even the minimal procedure—two injections of the lowest concentration tested—resulted in significant and stable antibodies.

And, as expected, these antibodies blocked the virus they were directed against: SARS-CoV-2.

The caveats

This approach seems to work—we can seemingly get anybody to make broadly neutralizing antibodies for months at a time. What’s the hitch? For starters, this isn’t necessarily great for a rapidly emerging pandemic. It takes a while to identify broadly neutralizing antibodies after a pathogen is identified. And, while it’s simple to ship DNA around the world to where it will be needed, injection setups that also produce the small electric pulses are not exactly standard equipment even in industrialized countries, much less the Global South.

Then there’s the issue of whether this really is a longer-term fix. Widespread use of broadly neutralizing antibodies will create a strong selective pressure for the evolution of variants that the antibody can no longer bind to. That may not always be a problem—broadly neutralizing antibodies generally bind to parts of proteins that are absolutely essential for the proteins’ function, and so it may not be possible to change those while maintaining the function. But that’s unlikely to always be the case.

In the end, however, social acceptance may end up being the biggest problem. People had an utter freakout over unfounded conspiracies that the RNA of COVID vaccines would somehow lead to permanent genetic changes. Presumably, having DNA that’s stable for months would be even harder for some segments of the public to swallow.

Nature Medicine, 2025. DOI: 10.1038/s41591-025-03969-0 (About DOIs).

John is Ars Technica’s science editor. He has a Bachelor of Arts in Biochemistry from Columbia University, and a Ph.D. in Molecular and Cell Biology from the University of California, Berkeley. When physically separated from his keyboard, he tends to seek out a bicycle, or a scenic location for communing with his hiking boots.

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Dinosaurs may have flourished right up to when the asteroid hit

asteroid, Biology, dinosaurs, evolution, Impact, paleontology, Science / Mike M. / October 25, 2025

That seemingly changes as of now, with new argon dating of strata from the Naashoibito Member in the San Juan Basin of present-day New Mexico. Many dinosaur fossils have been obtained from this region, and we know the site differs from the sort of ecosystem found at Hell Creek. But it was previously thought to date back closer to a million years before the mass extinction. The new dates, plus the alignment of magnetic field reversals, tell us that the ecosystem was a contemporary of the one in Hell Creek, and dates to the last few hundred thousand years prior to the mass extinction.

Diverse ecosystems

The fossils at Naashoibito have revealed an ecosystem we now label the “Alamo Wash local fauna.” And they’re fairly distinct from the ones found in Wyoming, despite being just 1,500 kilometers further south. Analyzing the species present using ecological measures, the researchers found that dinosaurs formed two “bioprovinces” in the late Cretaceous—essentially, there were distinct ecosystems present in the northern and southern areas.

This doesn’t seem to be an artifact of the sites, as mammalian fossils seem to reflect a single community across both areas near the mass extinction, but had distinct ecologies both earlier and after. The researchers propose that temperature differences were the key drivers of the distinction, something that may have had less of an impact on mammals, which are generally better at controlling their own temperatures.

Overall, the researchers conclude that, rather than being dominated by a small number of major species, “dinosaurs were thriving in New Mexico until the end of the Cretaceous.”

While this speaks directly to the idea that limited diversity may have primed the dinosaurs for extinction, it also may have implications for the impact of the contemporaneous eruptions in the Deccan Traps. If these were having a major global impact, then it’s a bit unlikely that dinosaurs would be thriving anywhere.

Even with the new data, however, our picture is still limited to the ecosystems present on the North American continent. We do have fossils from elsewhere, but they’re not exactly dated. There are some indications of dinosaurs in the late Cretaceous in Europe and South America, but we don’t have a clear picture of the ecosystems in which they were found. So, while these findings help clarify the diversity of dinosaurs in the time leading up to their extinction, there’s still a lot left to learn.

Science, 2025. DOI: 10.1126/science.adw3282 (About DOIs).

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Bats eat the birds they pluck from the sky while on the wing

bats, Biology, birds, Ecology, hunting, Science / Kelly Newman / October 24, 2025

There are three species of bats that eat birds. We know that because we have found feathers and other avian remains in their feces. What we didn’t know was how exactly they hunt birds, which are quite a bit heavier, faster, and stronger than the insects bats usually dine on.

To find out, Elena Tena, a biologist at Doñana Biological Station in Seville, Spain, and her colleagues attached ultra-light sensors to Nyctalus Iasiopterus, the largest bats in Europe. What they found was jaw-droppingly brutal.

Inconspicuous interceptors

Nyctalus Iasiopterus, otherwise known as greater noctule bats, have a wingspan of about 45 centimeters. They have reddish-brown or chestnut fur with a slightly paler underside, and usually weigh around 40 to 60 grams. Despite that minimal weight, they are the largest of the three bat species known to eat birds, so the key challenge in getting a glimpse into the way they hunt was finding sensors light enough to not impede the bats’ flight.

Cameras, which are the usual go-to sensor, were out of the question. “Bats hunt at night, so you’d need night vision cameras, which together with batteries are too heavy for a bat to carry. Our sensors had to weigh below 10 percent of the weight of the bat—four to six grams,” Tena explained.

Tena and her team explored several alternative approaches throughout the last decade, including watching the bats from the ground or using military-grade radars. But even then, catching the hunting bats red-handed remained impossible.

In recent years, the technology and miniaturization finally caught up with Tena’s needs, and the team found the right sensors for the job and attached them to 14 greater noctule bats over the course of two years. The tags used in the study weighed around four grams, could run for several hours, and registered sound, altitude, and acceleration. This gave Tena and her colleagues a detailed picture of the bats’ behavior in the night sky. The recordings included both ambient environmental sounds and the ultra-frequency bursts bats use for echolocation. Combining altitude with accelerometer readouts enabled scientists to trace the bats’ movements through all their fast-paced turns, dives, and maneuvers.

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DNA analysis reveals likely pathogens that killed Napoleon’s army

Biology, DNA analysis, forensic archaeology, history, Napoleon Bonaparte, pathogens, Science / DJ Henderson / October 24, 2025

State-of-the-art methodologies

Rascovan and his co-authors note in their paper that the 2006 study relied upon outdated PCR-based technologies for its DNA analysis. As for the virus family detected in the Kalingrad dental pulp, they argue that those viruses are both ubiquitous and usually asymptomatic in humans—and thus are unlikely to be the primary culprits for the diseases that wiped out the French army. So Rascovan’s team decided to use current state-of-the-art DNA methodologies to re-analyze a different set of remains of Napoleonic soldiers who died in Vilnius.

“In most ancient human remains, pathogen DNA is extremely fragmented and only present in very low quantities, which makes it very difficult to obtain whole genomes,” said Rascovan. “So we need methods capable of unambiguously identifying infectious agents from these weak signals, and sometimes even pinpointing lineages, to explore the pathogenic diversity of the past.”

An 1812 report from one of Napoleon’s physicians, J.R.L. de Kirckhoff, specifically noted typhus, dysentery, and diarrhea after the soldiers arrived in Vilnius, which he attributed to large barrels of salted beets the starving troops consumed, “greatly upsetting us and strongly irritating the intestinal tract.” Rascovan et al. note that such symptoms could accompany any number of conditions or diseases common to 19th-century Europe. “Even today, two centuries later, it would still be impossible to perform a differential diagnosis between typhus, typhoid, or paratyphoid fever based solely on the symptoms or the testimonies of survivors,” the authors wrote.

Imperial Guard button discovered during excavation. Credit: UMR 6578 Aix-Marseille Université, CNRS, EFS

Over 3,200 individual remains, almost all men between the ages of 20 and 50, were excavated from the mass grave at Vilnius. Rascovan et al. focused on 13 teeth from 13 different individuals. To compensate for the degraded nature of the 200-year-old genome fragments, co-authors at the University of Tartu in Estonia helped develop a multistep authentication method to more accurately identify pathogens in the samples. In some cases, they were even able to identify a specific lineage.

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