James Dewey Watson, who helped reveal DNA’s double-helix structure, kicked off the Human Genome Project, and became infamous for his racist, sexist, and otherwise offensive statements, has died. He was 97.

His death was confirmed to The New York Times by his son Duncan, who said Watson died on Thursday in a hospice in East Northport, New York, on Long Island. He had previously been hospitalized with an infection. Cold Spring Harbor Laboratory also confirmed his passing.

Watson was born in Chicago in 1928 and attained scientific fame in 1953 at 25 years old for solving the molecular structure of DNA—the genetic blueprints for life—with his colleague Francis Crick at England’s Cavendish laboratory. Their discovery heavily relied on the work of chemist and crystallographer Rosalind Franklin at King’s College in London, whose X-ray images of DNA provided critical clues to the molecule’s twisted-ladderlike architecture. One image in particular from Franklin’s lab, Photo 51, made Watson and Crick’s discovery possible. But, she was not fully credited for her contribution. The image was given to Watson and Crick without Franklin’s knowledge or consent by Maurice Wilkins, a biophysicist and colleague of Franklin.

Watson, Crick, and Wilkins were awarded the Nobel Prize in Physiology or Medicine in 1962 for the discovery of DNA’s structure. By that time, Franklin had died (she died in 1958 at the age of 37 from ovarian cancer), and Nobels are not given posthumously. But Watson and Crick’s treatment of Franklin and her research has generated lasting scorn within the scientific community. Throughout his career and in his memoir, Watson disparaged Franklin’s intelligence and appearance.

https://arstechnica.com/health/2025/11/james-watson-who-helped-unravel-dnas-double-helix-has-died/

The federal government shutdown, now in its 38th day, prompted the Federal Aviation Administration to issue a temporary emergency order Thursday prohibiting commercial rocket launches from occurring during “peak hours” of air traffic.

The FAA also directed commercial airlines to reduce domestic flights from 40 “high impact airports” across the country in a phased approach beginning Friday. The agency said the order from the FAA’s administrator, Bryan Bedford, is aimed at addressing “safety risks and delays presented by air traffic controller staffing constraints caused by the continued lapse in appropriations.”

The government considers air traffic controllers essential workers, so they remain on the job without pay until Congress passes a federal budget and President Donald Trump signs it into law. The shutdown’s effects, which affected federal workers most severely at first, are now rippling across the broader economy.

Sharing the airspace

Vehicles traveling to and from space share the skies with aircraft, requiring close coordination with air traffic controllers to clear airspace for rocket launches and reentries. The FAA said its order restricting commercial air traffic, launches, and reentries is intended to “ensure the safety of aircraft and the efficiency of the [National Airspace System].”

In a statement explaining the order, the FAA said the air traffic control system is “stressed” due to the shutdown.

“With continued delays and unpredictable staffing shortages, which are driving fatigue, risk is further increasing, and the FAA is concerned with the system’s ability to maintain the current volume of operations,” the regulator said. “Accordingly, the FAA has determined additional mitigation is necessary.”

Beginning Monday, the FAA said commercial space launches will only be permitted between 10 pm and 6 am local time, when the national airspace is most calm. The order restricts commercial reentries to the same overnight timeframe. The FAA licenses all commercial launches and reentries.

https://arstechnica.com/space/2025/11/faa-says-commercial-rockets-must-launch-at-night-citing-government-shutdown/

“This site reveals an extraordinary story of cultural continuity,” said Braun in a recent press release.

When the going gets tough, the tough make tools

Nomorotukunan’s layers of stone tools span the transition from the Pliocene to the Pleistocene, during which Earth’s climate turned gradually cooler and drier after a 2 to 3 million-year warm spell. Pollen and other microscopic traces of plants in the sediment at Nomorotukunan tell the tale: the lakeshore marsh gradually dried up, giving way to arid grassland dotted with shrubs. On a shorter timescale, hominins at Nomorotukunan faced wildfires (based on microcharcoal in the sediments), droughts, and rivers drying up or changing course.

“As vegetation shifted, the toolmaking remained steady,” said National University of Kenya archaeologist Rahab N. Kinyanjui in a recent press release. “This is resilience.”

Making sharp stone tools may have helped generations of hominins survive their changing, drying world. In the warm, humid Pliocene, finding food would have been relatively easy, but as conditions got tougher, hominins probably had to scavenge or dig for their meals. At least one animal bone at Nomorotukunan bears cut marks where long-ago hominins carved up the carcass for meat—something our lineage isn’t really equipped to do with its bare hands and teeth. Tools also would have enabled early hominins to dig up and cut tubers or roots.

It’s fair to assume that sharpened wood sticks probably also played a role in that particular work, but wood doesn’t tend to last as long as stone in the archaeological record, so we can’t say for sure. What is certain are the stone tools and cut bones, which hint at what Utrecht University archaeologist Dan Rolier, a coauthor of the paper, calls “one of our oldest habits: using technology to steady ourselves against change.”

A tale as old as time

Nomorotukunan may hint that Oldowan technology is even older than the earliest tools archaeologists have unearthed so far. The oldest tools unearthed from the deepest layer at Nomorotukunan are the work of skilled flint-knappers who understood where to strike a stone, and at exactly which angle, to flake off the right shape. They also clearly knew how to select the right stones for the job (fine-grained chalcedony for the win, in this case). In other words, these tools weren’t the work of a bunch of hominins who were just figuring out, for the first time, how to bang the rocks together.

https://arstechnica.com/science/2025/11/10000-generations-of-hominins-used-the-same-stone-tools-to-weather-a-changing-world/

Doubling cadence … This was the fourth flight of Europe’s new Ariane 6 rocket, and its third operational launch. Arianespace plans one more Ariane 62 launch to close out the year with a pair of Galileo navigation satellites. The company aims to double its Ariane 6 launch cadence in 2026, with between six and eight missions planned, according to David Cavaillès, Arianespace’s CEO. The European launch provider will open its 2026 manifest with the first flight of the more powerful four-booster variant of the rocket. If the company does manage eight Ariane 6 flights in 2026, it will already be close to reaching the stated maximum launch cadence of between nine and 10 flights per year.

India sets its own record for payload mass. The Indian Space Research Organization on Sunday successfully launched the Indian Navy’s advanced communication satellite GSAT-7R, or CMS-03, on an LVM3 rocket from the Satish Dhawan Space Center, The Hindu reports. The indigenously designed and developed satellite, weighing approximately 4.4 metric tons (9,700 pounds), is the heaviest satellite ever launched by an Indian rocket and marks a major milestone in strengthening the Navy’s space-based communications and maritime domain awareness.

Going heavy … The launch Sunday was India’s fourth of 2025, a decline from the country’s high-water mark of eight orbital launches in a year in 2023. The failure in May of India’s most-flown rocket, the PSLV, has contributed to this year’s slower launch cadence. India’s larger rockets, the GSLV and LVM3, have been more active while officials grounded the PSLV for an investigation into the launch failure. (submitted by EllPeaTea)

Blue Origin preps for second flight of New Glenn. The road to the second flight of Blue Origin’s heavy-lifting New Glenn rocket got a lot clearer this week. The company confirmed it is targeting Sunday, November 9, for the launch of New Glenn from Cape Canaveral Space Force Station, Florida. This follows a successful test-firing of the rocket’s seven BE-4 main engines last week, Ars reports. Blue Origin, the space company owned by billionaire Jeff Bezos, said the engines operated at full power for 22 seconds, generating nearly 3.9 million pounds of thrust on the launch pad.

https://arstechnica.com/space/2025/11/rocket-report-canada-invests-in-sovereign-launch-india-flexes-rocket-muscles/

Right now, we probably don’t have the ability to detect these small changes in phenomena. However, that may change, as a next-generation version of the Event Horizon Telescope is being considered, along with a space-based telescope that would operate on similar principles. So the team (four researchers based in Shanghai and CERN) decided to repeat an analysis they did shortly before the Event Horizon Telescope went operational, and consider whether the next-gen hardware might be able to pick up features of the environment around the black hole that might discriminate among different theorized versions of gravity.

Theorists have been busy, and there are a lot of potential replacements for general relativity out there. So, rather than working their way through the list, they used a model of gravity (the parametric Konoplya–Rezzolla–Zhidenko metric) that allows that isn’t specific to any given hypothesis. Instead, it allows some of its parameters to be changed, thus allowing the team to vary the behavior of gravity within some limits. To get a sense of the sort of differences that might be present, the researchers swapped two different parameters between zero and one, giving them four different options. Those results were compared to the Kerr metric, which is the standard general relativity version of the event horizon.

Small but clear differences

Using those five versions of gravity, they model the three-dimensional environment near the event horizon using hydrodynamic simulations, including infalling matter, the magnetic fields it produces, and the jets of matter that those magnetic fields power.

The results resemble the sorts of images that the Event Horizon Telescope produced. These include a bright ring with substantial asymmetry, where one side is significantly brighter due to the rotation of the black hole. And, while the differences are subtle between all the variations of gravity, they’re there. One extreme version produced the smallest but brightest ring; another had a reduced contrast between the bright and dim side of the ring. There were also differences between the width of the jets produced in these models.

https://arstechnica.com/science/2025/11/imaging-black-holes-may-help-us-rule-out-some-models-of-gravity/

Even in its simplified form, however, it’s still a model of a quantum system, with all the computational complexity that comes with that. So the Quantinuum team modeled a few systems that classical computers struggle with. One was simply looking at a larger grid of atoms than most classical simulations have done; another expanded the grid in an additional dimension, modeling layers of a material. Perhaps the most complicated simulation involved what happens when a laser pulse of the right wavelength hits a superconductor at room temperature, an event that briefly induces a superconducting state.

And the system produced results, even without error correction. “It’s maybe a technical point, but I think it’s very important technical point, which is [that] the circuits that we ran, they all had errors,” Dreyer told Ars. “Maybe on the average of three or so errors, and for some reason, that is not very fully understood for this application, it doesn’t matter. You still get almost the perfect result in some of these cases.”

That said, he also indicated that having higher-fidelity hardware would help the team do a better job of putting the system in a ground state or running the simulation for longer. But those will have to wait for future hardware.

What’s next

If you look at Quantinuum’s roadmap for that future hardware, Helios would appear to be the last of its kind. It and earlier versions of the processors have loops and large straight stretches; everything in the future features a grid of squares. But both Strabley and Hayes said that Helios has several key transitional features. “Those ions are moving through that junction many, many times over the course of a circuit,” Strabley told Ars. “And so it’s really enabled us to work on the reliability of the junction, and that will translate into the large-scale systems.”

https://arstechnica.com/science/2025/11/new-quantum-computing-hardware-sorts-ions-for-computation/

It was probably always when, not if, Google would add its name to the list of companies intrigued by the potential of orbiting data centers.

Google announced Tuesday a new initiative, named Project Suncatcher, to examine the feasibility of bringing artificial intelligence to space. The idea is to deploy swarms of satellites in low-Earth orbit, each carrying Google’s AI accelerator chips designed for training, content generation, synthetic speech and vision, and predictive modeling. Google calls these chips Tensor Processing Units, or TPUs.

“Project Suncatcher is a moonshot exploring a new frontier: equipping solar-powered satellite constellations with TPUs and free-space optical links to one day scale machine learning compute in space,” Google wrote in a blog post.

“Like any moonshot, it’s going to require us to solve a lot of complex engineering challenges,” Google’s CEO, Sundar Pichai, wrote on X. Pichai noted that Google’s early tests show the company’s TPUs can withstand the intense radiation they will encounter in space. “However, significant challenges still remain like thermal management and on-orbit system reliability.”

The why and how

Ars reported on Google’s announcement on Tuesday, and Google published a research paper outlining the motivation for such a moonshot project. One of the authors, Travis Beals, spoke with Ars about Project Suncatcher and offered his thoughts on why it just might work.

“We’re just seeing so much demand from people for AI,” said Beals, senior director of Paradigms of Intelligence, a research team within Google. “So, we wanted to figure out a solution for compute that could work no matter how large demand might grow.”

Higher demand will lead to bigger data centers consuming colossal amounts of electricity. According to the MIT Technology Review, AI alone could consume as much electricity annually as 22 percent of all US households by 2028. Cooling is also a problem, often requiring access to vast water resources, raising important questions about environmental sustainability.

https://arstechnica.com/space/2025/11/if-you-want-to-satiate-ais-hunger-for-power-google-suggests-going-to-space/

Many insect species hear using tympanal organs, membranes roughly resembling our eardrums but located on their legs. Grasshoppers, mantises, and moths all have them, and for decades, we thought that female stinkbugs of the Dinidoridae family have them, too, although located a bit unusually on their hind rather than front legs.

Suspecting that they use their hind leg tympanal organs to listen to male courtship songs, a team of Japanese researchers took a closer look at the organs in Megymenum gracilicorne, a Dinidoridae stinkbug species native to Japan. They discovered that these “tympanal organs” were not what they seemed. They’re actually mobile fungal nurseries of a kind we’ve never seen before.

Portable gardens

Dinidoridae is a small stinkbug family that lives exclusively in Asia. The bug did attract some scientific attention, but not nearly as much as its larger relatives like Pentatomidae. Prior work looking specifically into organs growing on the hind legs of Dinidoridae females was thus somewhat limited. “Most research relied on taxonomic and morphological approaches. Some taxonomists did describe that female Dinidoridae stinkbugs have an enlarged part on the hind legs that looks like the tympanal organ you can find, for example, in crickets,” said Takema Fukatsu, an evolutionary biologist at the National Institute of Advanced Industrial Science and Technology in Tokyo.

Based on that appearance, these parts were classified as tympanal organs—the case was closed, and it stayed closed until Fukatsu’s team started examining them more closely. Most insects have tympanal organs on their front legs, not hind legs, or on abdominal segments. The initial goal of Fukatsu’s study was to figure out what impact this unusual position has on Dinidoridae females’ ability to hear sounds.

Early on in the study, it turned out that whatever Dinidoridae females have on their hind legs, they are not tympanal organs. “We found no tympanal membrane and no sensory neurons, so the enlarged parts on the hind legs had nothing to do with hearing,” Fukatsu explained. Instead, the organ had thousands of small pores filled with benign filamentous fungi. The pores were connected to secretory cells that released substances that Fukatsu’s team hypothesized were nutrients enabling the fungi to grow.

https://arstechnica.com/science/2025/11/some-stinkbugs-legs-carry-a-mobile-fungal-garden/

President Donald Trump alongside Office of Management and Budget Director Russell Vought.

Credit: Brendan Smialowski/AFP via Getty Images

However, the full impact of the shutdown and the Trump administration’s broader assaults on science to US international competitiveness, economic security, and electoral politics could take years to materialize.

In parallel, the dramatic drop in international student enrollment, the financial squeeze facing research institutions, and research security measures to curb foreign interference spell an uncertain future for American higher education.

With neither the White House nor Congress showing signs of reaching a budget deal, Trump continues to test the limits of executive authority, reinterpreting the law—or simply ignoring it.

Earlier in October, Trump redirected unspent research funding to pay furloughed service members before they missed their Oct. 15 paycheck. Changing appropriated funds directly challenges the power vested in Congress—not the president—to control federal spending.

The White House’s promise to fire an additional 10,000 civil servants during the shutdown, its threat to withhold back pay from furloughed workers, and its push to end any programs with lapsed funding “not consistent with the President’s priorities” similarly move to broaden presidential power.

Here, the damage to science could snowball. If Trump and Vought chip enough authority away from Congress by making funding decisions or shuttering statutory agencies, the next three years will see an untold amount of impounded, rescinded, or repurposed research funds.

The government shutdown has emptied many laboratories staffed by federal scientists. Combined with other actions by the Trump administration, more scientists could continue to lose funding.

Credit: Monty Rakusen/DigitalVision via Getty Images

Science, democracy, and global competition

While technology has long served as a core pillar of national and economic security, science has only recently reemerged as a key driver of greater geopolitical and cultural change.

China’s extraordinary rise in science over the past three decades and its arrival as the United States’ chief technological competitor has upended conventional wisdom that innovation can thrive only in liberal democracies.

The White House’s efforts to centralize federal grantmaking, restrict free speech, erase public data, and expand surveillance mirror China’s successful playbook for building scientific capacity while suppressing dissent.

As the shape of the Trump administration’s vision for American science has come into focus, what remains unclear is whether, after the shutdown, it can outcompete China by following its lead.

Kenneth M. Evans is a Fellow in Science, Technology, and Innovation Policy at the Baker Institute for Public Policy, Rice University.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

https://arstechnica.com/science/2025/11/disruption-to-science-will-last-longer-than-the-us-government-shutdown/

You’ll often hear plastic pollution referred to as a problem. But the reality is that it’s multiple problems. Depending on the properties we need, we form plastics out of different polymers, each of which is held together by a distinct type of chemical bond. So the method we use to break down one type of polymer may be incompatible with the chemistry of another.

That problem is why, even though we’ve had success finding enzymes that break down common plastics like polyesters and PET, they’re only partial solutions to plastic waste. However, researchers aren’t sitting back and basking in the triumph of partial solutions, and they’ve now got very sophisticated protein design tools to help them out.

That’s the story behind a completely new enzyme that researchers developed to break down polyurethane, the polymer commonly used to make foam cushioning, among other things. The new enzyme is compatible with an industrial-style recycling process that breaks the polymer down into its basic building blocks, which can be used to form fresh polyurethane.

Breaking down polyurethane

The new paper that describes the development of this enzyme lays out the scale of the problem: In 2024, we made 22 million metric tons of polyurethane. The urethane bond that defines these involves a nitrogen bonded to a carbon that in turn is bonded to two oxygens, one of which links into the rest of the polymer. The rest of the polymer, linked by these bonds, can be fairly complex and often contains ringed structures related to benzene.

Digesting polyurethanes is challenging. Individual polymer chains are often extensively cross-linked, and the bulky structures can make it difficult for enzymes to get at the bonds they can digest. A chemical called diethylene glycol can partially break these molecules down, but only at elevated temperatures. And it leaves behind a complicated mess of chemicals that can’t be fed back into any useful reactions. Instead, it’s typically incinerated as hazardous waste.

https://arstechnica.com/science/2025/10/polyurethane-is-the-latest-polymer-broken-down-by-designer-enzymes/