Science – Page 6

Melissa set to be the strongest hurricane to ever strike Jamaica

hurricanes, jamaica, melissa, Science, Weather / Mike M. / 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 / Paul Patrick / 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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DNA analysis reveals likely pathogens that killed Napoleon’s army

Biology, DNA analysis, forensic archaeology, history, Napoleon Bonaparte, pathogens, Science / Rejus Almole / October 25, 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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Rocket Report: China tests Falcon 9 lookalike; NASA’s Moon rocket fully stacked

artemis II, blue origin, china, falcon 9, LandSpace, launch, NASA, new glenn, rocket report, Science, Space, space launch system, spacex / Tim Belzer / October 25, 2025

A South Korean rocket startup will soon make its first attempt to reach low-Earth orbit.

The Orion spacecraft for the Artemis II mission is lowered on top of the Space Launch System rocket at Kennedy Space Center, Florida.

Welcome to Edition 8.16 of the Rocket Report! The 10th anniversary of SpaceX’s first Falcon 9 rocket landing is coming up at the end of this year. We’re still waiting for a second company to bring back an orbital-class booster from space for a propulsive landing. Two companies, Jeff Bezos’ Blue Origin and China’s LandSpace, could join SpaceX’s exclusive club as soon as next month. (Bezos might claim he’s already part of the club, but there’s a distinction to be made.) Each company is in the final stages of launch preparations—Blue Origin for its second New Glenn rocket, and LandSpace for the debut flight of its Zhuque-3 rocket. Blue Origin and LandSpace will both attempt to land their first stage boosters downrange from their launch sites. They’re not exactly in a race with one another, but it will be fascinating to see how New Glenn and Zhuque-3 perform during the uphill and downhill phases of flight, and whether one or both of the new rockets stick the landing.

As always, we welcome reader submissions. If you don’t want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets, as well as a quick look ahead at the next three launches on the calendar.

The race for space-based interceptors. The Trump administration’s announcement of the Golden Dome missile defense shield has set off a race among US companies to develop and test space weapons, some of them on their own dime, Ars reports. One of these companies is a 3-year-old startup named Apex, which announced plans to test a space-based interceptor as soon as next year. Apex’s concept will utilize one of the company’s low-cost satellite platforms outfitted with an “Orbital Magazine” containing multiple interceptors, which will be supplied by an undisclosed third-party partner. The demonstration in low-Earth orbit could launch as soon as June 2026 and will test-fire two interceptors from Apex’s Project Shadow spacecraft. The prototype interceptors could pave the way for operational space-based interceptors to shoot down ballistic missiles. (submitted by biokleen)

Usual suspects … Traditional defense contractors are also getting in the game. Northrop Grumman’s CEO, Kathy Warden, said earlier this year that her company is already testing space-based interceptor components on the ground. This week, Lockheed Martin announced it is on a path to test a space-based interceptor in orbit by 2028. Neither company has discussed as much detail of their plans as Apex revealed this week.

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Lockheed Martin’s latest “New Space” investment. As interest grows in rotating detonation engines for hypersonic flight, a startup specialist in the technology says it will receive backing from Lockheed Martin’s corporate venture capital arm, Aviation Week & Space Technology reports. The strategic investment by Lockheed Martin Ventures “reflects the potential of Venus’s dual-use technology” in an era of growing defense and space spending, Venus Aerospace said in a statement. Venus said its partnership with Lockheed Martin combines the former’s startup mindset with the latter’s resources and industry expertise. The companies did not announce the value of Lockheed’s investment, but Venus said it has raised $106 million since its founding in 2020. Lockheed Martin Ventures has made similar investments in other rocket startups, including Rocket Lab in 2015.

What’s this actually for? … Houston-based Venus Aerospace completed a high-thrust test flight of its Rotating Detonation Rocket Engine (RDRE) in May from Spaceport America, New Mexico. Rotating detonation engine technology is interesting because it has the potential to significantly increase fuel efficiency in various applications, from Navy carriers to rocket engines, Ars reported earlier this year. The engine works by producing a shockwave with a flow of detonation traveling through a circular channel. The engine harnesses these supersonic detonation waves to generate thrust. “Venus has proven in flight the most efficient rocket engine technology in history,” said Sassie Duggleby, co-founder and CEO of Venus Aerospace. “With support from Lockheed Martin Ventures, we will advance our capabilities to deliver at scale and deploy the engine that will power the next 50 years of defense, space, and commercial high-speed aviation.”

South Korean startup receives permission to fly. Innospace announced on October 20 that it has received South Korea’s first private commercial launch permit from the Korea AeroSpace Administration,” the Chosun Daily reports. Accordingly, Innospace will launch its independently developed “HANBIT-Nano” launch vehicle from a Brazilian launch site as early as late this month. Innospace stated that the launch window for this mission has been set for October 28 through November 28. The launch site is the Alcântara Space Center, operated by the Brazilian Air Force.

Aiming for LEO … This will be the first flight of Innospace’s HANBIT-Nano launch vehicle, standing roughly 72 feet (22 meters) tall with a diameter of 4.6 feet (1.4 meters). The two-stage rocket is powered by hybrid propulsion, consuming a mixture of paraffin and liquid oxygen. For its debut flight, the rocket will target an orbit about 300 kilometers (186 miles) high with a batch of small satellites from customers in South Korea, Brazil, and India. According to Innospace, HANBIT-Nano can lift about 200 pounds (90 kilograms) of payload into orbit.

A new record for rocket reuse. SpaceX’s launch of a Falcon 9 rocket from Florida on October 19 set a new record for reusable rockets, Ars reports. It marked the 31st launch of the company’s most-flown Falcon 9 booster. The rocket landed on SpaceX’s recovery ship in the Atlantic Ocean to be returned to Florida for a 32nd flight. Several more rockets in SpaceX’s inventory are nearing their 30th launch. In all, SpaceX has more than 20 Falcon 9 boosters in its fleet on both the East and West Coasts. SpaceX engineers are now certifying the Falcon 9 boosters for up to 40 flights apiece.

10,000 and counting … SpaceX’s two launches last weekend weren’t just noteworthy for Falcon 9 lore. Hours after setting the new booster reuse record, SpaceX deployed a batch of 28 Starlink satellites from a different rocket after lifting off from California. This mission propelled SpaceX’s Starlink program past a notable milestone. With the satellites added to the constellation on Sunday, the company has delivered more than 10,000 mass-produced Starlink spacecraft to low-Earth orbit. The exact figure stands at 10,006 satellites, according to a tabulation by Jonathan McDowell, an astrophysicist who expertly tracks comings and goings between Earth and space. About 8,700 of these Starlink satellites are still in orbit, with SpaceX adding more every week.

China is on the cusp of something big. Launch startup LandSpace is in the final stages of preparations for the first flight of its Zhuque-3 rocket and a potentially landmark mission for China, Space News reports. LandSpace said it completed the first phase of the Zhuque-3 rocket’s inaugural launch campaign this week. The Zhuque-3 is the largest commercial rocket developed to date in China, nearly matching the size and performance of SpaceX’s Falcon 9, with nine first stage engines and a single upper stage engine. One key difference is that the Zhuque-3 burns methane fuel, while Falcon 9’s engines consume kerosene. Most notably, LandSpace will attempt to land the rocket’s first stage booster at a location downrange from the launch site, similar to the way SpaceX lands Falcon 9 boosters on drone ships at sea. Zhuque-3’s first stage will aim for a land-based site in an experiment that could pave the way for LandSpace to reuse rockets in the future.

Testing status … The recent testing at Jiuquan Satellite Launch Center in northwestern China included a propellant loading demonstration and a static fire test of the rocket’s first stage engines. Earlier this week, LandSpace integrated the payload fairing on the rocket. The company said it will return the rocket to a nearby facility “for inspection and maintenance in preparation for its upcoming orbital launch and first stage recovery.” The launch is expected to happen as soon as next month.

Uprated Ariane 6 won’t launch until next year. Arianespace has confirmed that the first flight of the more powerful, four-booster variant of the Ariane 6 rocket will not be launched until 2026, European Spaceflight reports. The first Ariane 64 rocket had been expected to launch in late 2025, carrying the first batch of Amazon’s Project Kuiper satellites. On October 16, Arianespace announced the fourth and final Ariane 6 flight of the year would carry a pair of Galileo satellites for Europe’s global satellite navigation system in December. This will follow an already-scheduled Ariane 6 launch scheduled for November 4. Both of the upcoming flights will employ the same Ariane 6 configuration used on all of the rocket’s flights to date. This version, known as Ariane 62, has two strap-on solid rocket boosters.

Kuiper soon … The Ariane 64 variant will expose the rocket to stronger forces coming from four solid rocket boosters, each producing about a million pounds (4,500 kilonewtons) of thrust. ArianeGroup, the rocket’s manufacturer, said a year ago that it completed qualification of the Ariane 6 upper stage to withstand the stronger launch loads. Arianespace didn’t offer any explanation of the Ariane 64’s delay from this year to next, but it did confirm the uprated rocket will be the company’s first flight of 2026. The mission will be the first of 18 Arianespace flights dedicated to launching Amazon’s Project Kuiper broadband satellites, adding Ariane 6 to the mix of rockets deploying the Internet network in low-Earth orbit.

Duffy losing confidence in Starship. NASA acting Administrator Sean Duffy made two television appearances on Monday morning in which he shook up the space agency’s plans to return humans to the Moon, Ars reports. Speaking on Fox News, where the secretary of transportation frequently appears in his acting role as NASA chief, Duffy said SpaceX has fallen behind in developing the Starship vehicle as a lunar lander. Duffy also indirectly acknowledged that NASA’s projected target of a 2027 crewed lunar landing is no longer achievable. Accordingly, he said he intended to expand the competition to develop a lander capable of carrying humans down to the Moon from lunar orbit and back.

The rest of the story … “They’re behind schedule, and so the President wants to make sure we beat the Chinese,” Duffy said of SpaceX. “He wants to get there in his term. So I’m in the process of opening that contract up. I think we’ll see companies like Blue [Origin] get involved, and maybe others. We’re going to have a space race in regard to American companies competing to see who can actually lead us back to the Moon first.” The timing of Duffy’s public appearances on Monday seems tailored to influence a fierce, behind-the-scenes battle to hold onto the NASA leadership position. Jared Isaacman, who Trump nominated and then withdrew for the NASA posting, is again under consideration at the White House to become the agency’s next full-time administrator. (submitted by zapman987)

Rocket fully stacked for Artemis II. “The last major hardware component before Artemis II launches early next year has been installed,” NASA’s acting Administrator Sean Duffy posted on X Monday. Over the weekend, ground teams at Kennedy Space Center in Florida hoisted the Orion spacecraft for the Artemis II mission atop its Space Launch System rocket inside the Vehicle Assembly Building. This followed the transfer of the Orion spacecraft to the VAB from a nearby processing facility last week. With Orion installed, the rocket is fully assembled to its complete height of 322 feet (98 meters) tall.

Four months away? … NASA is still officially targeting no earlier than February 5, 2026, for the launch of the Artemis II mission. This will be the first flight of astronauts to the vicinity of the Moon since 1972, and the first glimpse of human spaceflight beyond low-Earth orbit for several generations. Upcoming milestones in the Artemis II launch campaign include a countdown demonstration inside the VAB, where the mission’s four-person crew will take their seats in the Orion spacecraft to simulate what they’ll go through on launch day.

New Glenn staged for rollout. Dave Limp, Blue Origin’s CEO, posted a video this week of the company’s second New Glenn rocket undergoing launch preparations inside a hangar at Launch Complex 36 at Cape Canaveral, Florida. The rocket’s first and second stages are now mated together and installed on the transporter erector that will carry them from the hangar to the launch pad. “We will spend the next days on final checkouts and connecting the umbilicals. Stay tuned for rollout and hotfire!” Limp wrote.

“Big step toward launch” … The connection of New Glenn’s stages and integration on the transporter erector marks a “big step toward launch,” Limp wrote. A launch sometime in November is still possible if engineers can get through a smooth test-firing of the rocket’s seven main engines on the launch pad. The rocket will send two NASA spacecraft on a journey to Mars.

China launches clandestine satellite. China launched a Long March 5 rocket Thursday with a classified military satellite heading toward geosynchronous orbit, Space News reports. The satellite is named TJS-20, and the circumstances of the launch—using China’s most powerful operational rocket—suggest TJS-20 could be the next in a line of signals intelligence-gathering missions. The previous satellite of this line, TJS-11, launched in February 2024, also on a Long March 5.

Doing a lot … This launch continued China’s increasing use of the Long March 5 and its sister variant, the Long March 5B. The Long March 5 is expendable, and although we don’t know how much it costs, it can’t be cheap. It is a complex rocket powered by 10 engines on its core stage and four boosters, some burning liquid hydrogen fuel and others burning kerosene. The second stage also has two cryogenically fueled engines. The Long March 5 has now flown 16 times in nine years and seven times within the last two years. The uptick in launches is largely due to China’s use of the Long March 5 to launch satellites for the Guowang megaconstellation.

Next three launches

Oct. 25: Falcon 9 | Starlink 11-12 | Vandenberg Space Force Base, California | 14: 00 UTC

Oct. 26: H3 | HTV-X 1 | Tanegashima Space Center, Japan | 00: 00 UTC

Oct. 26: Long March 3B/E | Unknown Payload | Xichang Satellite Launch Center | 03: 50 UTC

Stephen Clark is a space reporter at Ars Technica, covering private space companies and the world’s space agencies. Stephen writes about the nexus of technology, science, policy, and business on and off the planet.

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

antibodies, Biology, DNA, electroporation, medicine, plasmid, Policy, Science / Paul Patrick / October 24, 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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Bats eat the birds they pluck from the sky while on the wing

bats, Biology, birds, Ecology, hunting, Science / Kris Guyer / 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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Dinosaurs may have flourished right up to when the asteroid hit

asteroid, Biology, dinosaurs, evolution, Impact, paleontology, Science / Kris Guyer / October 23, 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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An NIH director joins MAHA, gets replaced by JD Vance’s close friend

cancer, cellphones, fluoride, health, NIEHS, NIH, NTP, robert f kennedy jr, Science, trump administration / Paul Patrick / October 23, 2025

The director of a federal health institute that has arguably produced two of the most controversial government studies in recent years has accepted a new federal role to advance the goals of the Make America Healthy Again movement. Meanwhile, the person replacing him as director is a close friend of Vice President JD Vance and was installed in a process that experts describe as completely outside standard hiring practices.

The series of events—revealed in an email to staff last week from the National Institutes of Health Director Jay Bhattacharya—is only exacerbating the spiraling fears that science is being deeply corrupted by politics under the Trump administration.

Richard Woychik, a molecular geneticist, is the outgoing director of the NIH’s National Institute of Environmental Health Sciences (NIEHS), which is located in Research Triangle Park, North Carolina. He has been director since 2020 and was recently appointed to a second five-year term, according to Science magazine. Woychik was hired at the institute in 2010, when he joined as deputy director, and was appointed acting director in 2019.

As the director of NIEHS, Woychik was also the director of the National Toxicology Program (NTP). This is an interagency program that has produced two highly controversial scientific reports during Woychik’s time in NIEHS’s upper leadership. One, initially released in 2016, claimed that cellphone radiation causes cancer based on findings from rats, though only male rats. The final reports were published in 2018. Another controversial study, finalized this year, suggested that high levels of fluoride lower the IQ of children. Both the cellphone radiation and fluoride studies have been roundly criticized for flaws in their methodology and analysis, and the scientific community has largely dismissed them.

However, the studies align with—and bolster—the conspiracy theories and misinformation spread by the MAHA movement, which is led by ardent anti-vaccine activist and current US health secretary Robert F. Kennedy Jr. As health secretary, Kennedy has pledged to remove fluoride from municipal water, which, over decades, has proven safe and highly effective at preventing tooth decay in children. He has also, at various times, suggested 5G cell phone radiation causes cancer, a variety of other health conditions, changes to DNA, and is used as mass surveillance.

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The first people to set foot in Australia were fossil hunters

aboriginal australians, ancient people did stuff, Archaeology, australia, biological archaeology, Megafauna, megafaunal extinction, Science / Rejus Almole / October 23, 2025

I just think they’re neat

Europeans weren’t the first people to collect fossils in Australia.

Several species of short-faced kangaroos, like this one, once lived in Australia. Some stood two meters tall, while others were less than half a meter tall. Credit: By Ghedoghedo – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=8398432

Australia’s First Peoples may or may not have hunted the continent’s megafauna to extinction, but they definitely collected fossils.

A team of archaeologists examined the fossilized leg bone of an extinct kangaroo and realized that instead of evidence of butchery, cut marks on the bone reveal an ancient attempt at fossil collecting. That leaves Australia with little evidence of First Peoples hunting or butchering the continent’s extinct megafauna—and reopens the question of whether humans were responsible for the die-off of that continent’s giant Ice Age marsupials.

Fossil hunting in the Ice Age

In the unsolved case of whether humans hunted Australia’s Ice Age megafauna to extinction, the key piece of evidence so far is a tibia (one of the bones of the lower leg) from an extinct short-faced kangaroo. Instead of hopping like their modern relatives, these extinct kangaroos walked on their hind legs, probably placing all their weight on the tips of single hoofed toes. This particular kangaroo wasn’t quite fully grown when it died, which happened sometime between 44,500 and 55,200 years ago, based on uranium-series dating of the thin layer of rock covering most of the fossils in Mammoth Cave (in what’s now Western Australia).

There’s a shallow, angled chunk cut out of the bone near one end. When archaeologists first noticed the cut in 1970 after carefully chipping away the crust of calcium carbonate that had formed over the bone, it looked like evidence that Pleistocene hunters had carved up the kangaroo to eat it. But in their recent paper, University of New South Wales archaeologist Michael Archer and his colleagues say that’s probably not what happened. Instead, they have a stranger idea: “We suggest here that the purpose of this effort may have been the retrieval of the fossils from the bone-rich late-Pleistocene deposit in Mammoth Cave after its discovery by First Peoples,” they wrote in their recent paper.

a photo of a fossil bone with a shallow chunk cut out of it — This close-up image shows the cut kangaroo bone and a micro-CT image of the surfaces of the cut. Credit: Archer et al. 2025

The world used to be so much weirder

Based on the available archaeological evidence, it looks like people first set foot on Australia sometime around 65,000 years ago. At the time, the continent was home to a bizarre array of giant marsupials, as well as flightless birds even bigger and scarier than today’s emus and cassowaries. For the next 20,000 years, Australia’s First Peoples shared the landscape with short-faced kangaroos; Zygomaturus trilobus, a hulking 500-kilogram marsupial that looked a little like a rhinoceros; and Diprotodon optatum, the largest marsupial that ever lived: a 3,000-kilogram behemoth that roamed in huge herds (picture a bear about the size of a bison with a woodchuck’s face).

These species died out sometime around 45,000 or 40,000 years ago; today, they live on in ancient rock art and stories, some of which seem to describe people interacting with now-extinct species.

Since they had shared the continent with humans for at least 20,000 years at that point, it doesn’t seem that the sudden arrival of humans caused an immediate mass extinction. But it’s possible that by hunting or even setting controlled fires, people may have put just enough strain on these megafauna species to make them vulnerable enough for the next climate upheaval to finish them off.

In some parts of the world, there’s direct evidence that Pleistocene people hunted or scavenged meat from the remains of now-extinct megafauna. Elsewhere, archaeologists are still debating whether humans, the inexorable end of the last Ice Age, or some combination of the two killed off the world’s great Ice Age giants. The interaction between people and their local ecosystems looked (and still looks) different everywhere, depending on culture, environment, and a host of other factors.

The jury is still out on what killed the megafauna in Australia because the evidence we need either hasn’t survived the intervening millennia or still lies buried somewhere, waiting to be found and studied. For decades, the one clear bit of evidence has seemed to be the Mammoth Cave short-faced kangaroo tibia. But Archer and his colleagues argue that even that isn’t a smoking gun.

An man in khakis and a dark blue shirt studies a cave wall. — An archaeologist examines a fossil deposit in the wall of Mammoth Cave, in Western Australia. 50,000 years ago, one of the earliest people on the continent may also have stood here contemplating the fossils. Credit: Archer et al. 2025

Evidence of rock collecting, not butchery

For one thing, the researchers argue that the kangaroo had been dead for a very long time when the cut was made. Nine long, thin cracks run along the length of the tibia, formed when the bone dried and shrank. And in the cut section, there’s a short crack running across the width of the bone—but it stops at either end when it meets the long cracks from the bone’s drying. That suggests the bone had already dried and shrunk, leaving those long cracks before the cut was made. It may have just been a very old bone, or it may have already begun to fossilize, but the meat would have been long gone, leaving behind a bone sticking out of the cave wall.

Since there’s no mark or dent on the opposite side of the bone from the cut (which would have happened if it were lying on the ground being butchered), it was probably sticking out of the fossil bed in the cave wall when someone came along and tried to cut it free. And since a crust of calcium carbonate had time to form over the cut (it covers most of the fossils in Mammoth Cave like a rocky burial shroud), that must have happened at least 44,000 years ago.

That leaves us with an interesting mental image: a member of one of Australia’s First Peoples, 45,000 years ago, exploring a cave filled with the bones of fantastical, long-dead animals. This ancient caver finds a bone sticking out from the cave wall and tries to hack the protruding end free—twice, from different angles—before giving up and leaving it in place.

People have always collected cool rocks

We can’t know for sure why this long-ago person wanted the bone in the first place. (Did it have a religious purpose? Might it have made a good tool? Was it just a cool souvenir?) We also don’t know why they gave up their attempt. But if Archer and his colleagues are right, the bone leaves Australia without any clear evidence that ancient people hunted—or even scavenged food from the remains of—extinct Pleistocene megafauna like short-faced kangaroos.

“This is not to say that it did not happen, just that there is now no hard evidence to support that it did,” Archer and his colleagues wrote in their recent paper. We don’t yet know exactly how Australia’s First Peoples interacted with these species.

But whether Archer and his colleagues are correct in their analysis of this particular kangaroo bone or not, humans around the world have been picking up fossils for at least tens of thousands of years. There’s evidence that people in Australia have collected and traded the fossils of extinct animals for pretty much as long as people have been in Australia, including everything from trilobites to Zygomaturus teeth and the jawbones of other extinct marsupials.

“What we can conclude,” Archer and his colleagues wrote, “is that the first people in Australia who demonstrated a keen interest in and collected fossils were First Peoples, probably thousands of years before Europeans set foot on that continent.”

Royal Society Open Science, 2025. DOI: 10.1098/rsos.250078 (About DOIs).

Kiona is a freelance science journalist and resident archaeology nerd at Ars Technica.

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Google has a useful quantum algorithm that outperforms a supercomputer

Computer science, Features, Google, NMR, Physics, quantum computing, quantum mechanics, Science / Paul Patrick / October 22, 2025

An approach it calls “quantum echoes” takes 13,000 times longer on a supercomputer.

The work relied on Google’s current-generation quantum hardware, the Willow chip. Credit: Google

A few years back, Google made waves when it claimed that some of its hardware had achieved quantum supremacy, performing operations that would be effectively impossible to simulate on a classical computer. That claim didn’t hold up especially well, as mathematicians later developed methods to help classical computers catch up, leading the company to repeat the work on an improved processor.

While this back-and-forth was unfolding, the field became less focused on quantum supremacy and more on two additional measures of success. The first is quantum utility, in which a quantum computer performs computations that are useful in some practical way. The second is quantum advantage, in which a quantum system completes calculations in a fraction of the time it would take a typical computer. (IBM and a startup called Pasqual have published a useful discussion about what would be required to verifiably demonstrate a quantum advantage.)

Today, Google and a large collection of academic collaborators are publishing a paper describing a computational approach that demonstrates a quantum advantage compared to current algorithms—and may actually help us achieve something useful.

Out of time

Google’s latest effort centers on something it’s calling “quantum echoes.” The approach could be described as a series of operations on the hardware qubits that make up its machine. These qubits hold a single bit of quantum information in a superposition between two values, with probabilities of finding the qubit in one value or the other when it’s measured. Each qubit is entangled with its neighbors, allowing its probability to influence those of all the qubits around it. The operations that allow computation, called gates, are ways of manipulating these probabilities. Most current hardware, including Google’s, perform manipulations on one or two qubits at a time (termed one- and two-qubit gates, respectively.

For quantum echoes, the operations involved performing a set of two-qubit gates, altering the state of the system, and later performing the reverse set of gates. On its own, this would return the system to its original state. But for quantum echoes, Google inserts single-qubit gates performed with a randomized parameter. This alters the state of the system before the reverse operations take place, ensuring that the system won’t return to exactly where it started. That explains the “echoes” portion of the name: You’re sending an imperfect copy back toward where things began, much like an echo involves the imperfect reversal of sound waves.

That’s what the process looks like in terms of operations performed on the quantum hardware. But it’s probably more informative to think of it in terms of a quantum system’s behavior. As Google’s Tim O’Brien explained, “You evolve the system forward in time, then you apply a small butterfly perturbation, and then you evolve the system backward in time.” The forward evolution is the first set of two qubit gates, the small perturbation is the randomized one qubit gate, and the second set of two qubit gates is the equivalent of sending the system backward in time.

Because this is a quantum system, however, strange things happen. “On a quantum computer, these forward and backward evolutions, they interfere with each other,” O’Brien said. One way to think about that interference is in terms of probabilities. The system has multiple paths between its start point and the point of reflection—where it goes from evolving forward in time to evolving backward—and from that reflection point back to a final state. Each of those paths has a probability associated with it. And since we’re talking about quantum mechanics, those paths can interfere with each other, increasing some probabilities at the expense of others. That interference ultimately determines where the system ends up.

(Technically, these are termed “out of time order correlations,” or OTOCs. If you read the Nature paper describing this work, prepare to see that term a lot.)

Demonstrating advantage

So how do you turn quantum echoes into an algorithm? On its own, a single “echo” can’t tell you much about the system—the probabilities ensure that any two runs might show different behaviors. But if you repeat the operations multiple times, you can begin to understand the details of this quantum interference. And performing the operations on a quantum computer ensures that it’s easy to simply rerun the operations with different random one-qubit gates and get many instances of the initial and final states—and thus a sense of the probability distributions involved.

This is also where Google’s quantum advantage comes from. Everyone involved agrees that the precise behavior of a quantum echo of moderate complexity can be modeled using any leading supercomputer. But doing so is very time-consuming, so repeating those simulations a few times becomes unrealistic. The paper estimates that a measurement that took its quantum computer 2.1 hours to perform would take the Frontier supercomputer approximately 3.2 years. Unless someone devises a far better classical algorithm than what we have today, this represents a pretty solid quantum advantage.

But is it a useful algorithm? The repeated sampling can act a bit like the Monte Carlo sampling done to explore the behavior of a wide variety of physical systems. Typically, however, we don’t view algorithms as modeling the behavior of the underlying hardware they’re being run on; instead, they’re meant to model some other physical system we’re interested in. That’s where Google’s announcement stands apart from its earlier work—the company believes it has identified an interesting real-world physical system with behaviors that the quantum echoes can help us understand.

That system is a small molecule in a Nuclear Magnetic Resonance (NMR) machine. In a second draft paper being published on the arXiv later today, Google has collaborated with a large collection of NMR experts to explore that use.

From computers to molecules

NMR is based on the fact that the nucleus of every atom has a quantum property called spin. When nuclei are held near to each other, such as when they’re in the same molecule, these spins can influence one another. NMR uses magnetic fields and photons to manipulate these spins and can be used to infer structural details, like how far apart two given atoms are. But as molecules get larger, these spin networks can extend for greater distances and become increasingly complicated to model. So NMR has been limited to focusing on the interactions of relatively nearby spins.

For this work, though, the researchers figured out how to use an NMR machine to create the physical equivalent of a quantum echo in a molecule. The work involved synthesizing the molecule with a specific isotope of carbon (carbon-13) in a known location in the molecule. That isotope could be used as the source of a signal that propagates through the network of spins formed by the molecule’s atoms.

“The OTOC experiment is based on a many-body echo, in which polarization initially localized on a target spin migrates through the spin network, before a Hamiltonian-engineered time-reversal refocuses to the initial state,” the team wrote. “This refocusing is sensitive to perturbations on distant butterfly spins, which allows one to measure the extent of polarization propagation through the spin network.”

Naturally, something this complicated needed a catchy nickname. The team came up with TARDIS, or Time-Accurate Reversal of Dipolar InteractionS. While that name captures the “out of time order” aspect of OTOC, it’s simply a set of control pulses sent to the NMR sample that starts a perturbation of the molecule’s network of nuclear spins. A second set of pulses then reflects an echo back to the source.

The reflections that return are imperfect, with noise coming from two sources. The first is simply imperfections in the control sequence, a limitation of the NMR hardware. But the second is the influence of fluctuations happening in distant atoms along the spin network. These happen at a certain frequency at random, or the researchers could insert a fluctuation by targeting a specific part of the molecule with randomized control signals.

The influence of what’s going on in these distant spins could allow us to use quantum echoes to tease out structural information at greater distances than we currently do with NMR. But to do so, we need an accurate model of how the echoes will propagate through the molecule. And again, that’s difficult to do with classical computations. But it’s very much within the capabilities of quantum computing, which the paper demonstrates.

Where things stand

For now, the team stuck to demonstrations on very simple molecules, making this work mostly a proof of concept. But the researchers are optimistic that there are many ways the system could be used to extract structural information from molecules at distances that are currently unobtainable using NMR. They list a lot of potential upsides that should be explored in the discussion of the paper, and there are plenty of smart people who would love to find new ways of using their NMR machines, so the field is likely to figure out pretty quickly which of these approaches turns out to be practically useful.

The fact that the demonstrations were done with small molecules, however, means that the modeling run on the quantum computer could also have been done on classical hardware (it only required 15 hardware qubits). So Google is claiming both quantum advantage and quantum utility, but not at the same time. The sorts of complex, long-distance interactions that would be out of range of classical simulation are still a bit beyond the reach of the current quantum hardware. O’Brien estimated that the hardware’s fidelity would have to improve by a factor of three or four to model molecules that are beyond classical simulation.

The quantum advantage issue should also be seen as a work in progress. Google has collaborated with enough researchers at enough institutions that there’s unlikely to be a major improvement in algorithms that could allow classical computers to catch up. Until the community as a whole has some time to digest the announcement, though, we shouldn’t take that as a given.

The other issue is verifiability. Some quantum algorithms will produce results that can be easily verified on classical hardware—situations where it’s hard to calculate the right result but easy to confirm a correct answer. Quantum echoes isn’t one of those, so we’ll need another quantum computer to verify the behavior Google has described.

But Google told Ars nothing is up to the task yet. “No other quantum processor currently matches both the error rates and number of qubits of our system, so our quantum computer is the only one capable of doing this at present,” the company said. (For context, Google says that the algorithm was run on up to 65 qubits, but the chip has 105 qubits total.)

There’s a good chance that other companies would disagree with that contention, but it hasn’t been possible to ask them ahead of the paper’s release.

In any case, even if this claim proves controversial, Google’s Michel Devoret, a recent Nobel winner, hinted that we shouldn’t have long to wait for additional ones. “We have other algorithms in the pipeline, so we will hopefully see other interesting quantum algorithms,” Devoret said.

Nature, 2025. DOI: 10.1038/s41586-025-09526-6 (About DOIs).

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“Butt breathing” might soon be a real medical treatment

human physiology, Ig Nobel Prizes, medicine, physiology, Science / Paul Patrick / October 21, 2025

And Oxycyte was ideal for the group’s 2021 Ig Nobel-winning efforts. The experiments involved intra-anally administering oxygen gas or a liquid oxygenated perfluorocarbon to the unfortunate rodents and porcines. Yes, they gave the animals enemas. They then induced respiratory failure and evaluated the effectiveness of the intra-anal treatment. The result: Both treatments were pretty darned effective at staving off respiratory failure with no major complications.

Visual abstract shows highlights of first human clinical trial to evaluate the safety of enteral ventilation concept — Credit: Cincinnati Children’s/Med

So far, so good. The next logical step was to determine if EVA could work in human patients, too. “Patients with severe respiratory failure often need mechanical ventilation to survive, but these therapies can cause further lung injury,” the authors wrote in this latest paper. EVA “could give the lungs a chance to rest and heal.”

The team recruited 27 healthy adult men in Japan, each of whom received a dose of non-oxygenated perfluorodecalin via the anus. They were asked to retain the liquid for a full hour as the dosage slowly increased from 25 to 1,500 mL. Twenty of the men successfully completed the experiment. Apart from mild temporary abdominal bloating and discomfort—which proved to be dosage dependent and resolved with no need for medical attention—they experienced no adverse effects.

“This is the first human data and the results are limited solely to demonstrating the safety of the procedure and not its effectiveness,” said co-author Takanori Takebe of Cincinnati Children’s Hospital and the University of Osaka in Japan. “But now that we have established tolerance, the next step will be to evaluate how effective the process is for delivering oxygen to the bloodstream.”

Med, 2025. DOI: 10.1016/j.medj.2025.100887 (About DOIs).

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Breaking down rare earth element magnets for recycling

chemistry, rare earth elements, recycling, Science / Mike M. / October 20, 2025

All the world’s discarded phones, bricked laptops, and other trashed electronics are collectively a treasure trove of rare earth elements (REEs). But separating out and recovering these increasingly sought-after materials is no easy task.

However, a team of researchers says it has developed a way of separating REEs from waste—magnets, in this case—that is relatively easy, uses less energy, and isn’t nearly as emissions and pollution intensive as current methods. The team published a paper describing this method in the Proceedings of the National Academy of Sciences.

In short, this process involves using an electric current to heat waste magnets to very high temperatures very fast, and using chlorine gas to react with the non-REEs in the mix, keeping them in the vapor phase. James Tour, one of the authors and a professor of materials science and nanoengineering at Rice University, says that the research can help the United States meet its growing need for these elements.

“The country’s scurrying to try to see how we can get these [REEs],” he says. “And, in our argument, it’s all in our waste… We have it right here, just pull it right back out of the waste.”

Getting hot in here

In 2018, Tour and his colleagues discovered that this rapid heating process, called flash joule heating, can turn any carbon source—including coal, biochar, and mixed plastic—into graphene, a very thin, strong, and conductive material.

Building on this, in 2023, they developed a method that uses flash joule heating and chlorine. In this work, they identified the Gibbs free energy, the reactivity of a material, for the oxide form of all 17 REEs and nine common oxides found in REE waste.

Ground-up waste magnets are put on a platform made of carbon and surrounded by a glass chamber. A current runs through the platform, rapidly producing immense heat, thousands of degrees celsius in a matter of seconds. Chlorine gas is then released into the chamber, creating chlorides of unwanted elements like iron and lowering their boiling points.

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