Ars Technica Science

Credit: Samuel T. Fabian et al., 2026 Credit: Samuel T. Fabian et al., 2026 Male dragonflies are known to engage in mid-air "dogfights" to defend their breeding territory, using different maneuvers than those they employ when hunting prey. A new paper published in the Journal of the Royal Society Interface concluded that relatively simple rules drive that behavior, namely that male dragonflies are trying to maintain a tactical pos

Last week, just before the US started its break for the July Fourth holiday, the Nuclear Regulatory Commission (NRC) proposed a new rule that would change how it regulated exposure to radiation. The Trump administration has been pushing to restart construction of nuclear power plants in the US, and many pro-nuclear advocates have been complaining about the US's existing regulations, portraying them as the main barrier to the flourishing of the industry. So, it had seemed likely that major revisi

High above the remote Pacific Ocean, about halfway between Hawaii and the northernmost part of Australia, an air-launched rocket fired into space on Independence Day weekend to kick off a weekslong pursuit of a NASA astronomy satellite perilously close to falling out of orbit. The endeavor to rescue NASA's Swift satellite is the first mission of its kind. NASA put out a call for commercial companies less than a year ago to propose how they could rapidly build and launch a small satellite to latc

Physicist Ronald Koopman appeared at a Southern California Air District meeting in 2018 to talk about what seemed like an arcane scientific topic: hydrofluoric acid dispersion and water mitigation testing. Hydrofluoric acid, also known as hydrogen fluoride or HF, is used to manufacture a range of materials, including refrigerants, gasoline, fluorine-based pesticides and fluoropolymers like those used to make Teflon. It’s also one of the most corrosive and dangerous chemicals known. Koopman condu

Earth is the only planet we know of with buoyant, silica-rich continents. But, despite decades of research, geologists still don't agree on how they formed. "The continents started appearing around about four billion years ago—that's the oldest continental rock we know about,” said Tim Johnson, a geologist at Curtin University in Perth, Australia. “The Earth is four and a half billion years old, so why they started appearing then is unknown, as is the mechanism to make that continental crust." J

About 14 years ago, Chrissi Kelly lost her sense of smell. She had traveled to the Czech Republic to visit family and caught some virus. Months later, when she still couldn’t smell, she made the rounds to doctors, including her general practitioner and an ear, nose and throat specialist, trying to find answers. She was diagnosed with anosmia (smell loss), and like many patients with her condition, was told she’d have to learn to live with it. But for her, the loss was catastrophic. “After about

NASA’s Perseverance rover has spent five years traversing Jezero Crater looking for the chemical leftovers of whatever processes were at work on Mars billions of years ago. The rover has found organic carbon, but it has mostly been inside rocks that had to be drilled or abraded to expose it. But now, at an outcrop on the edge of an ancient river channel named Neretva Vallis, Perseverance detected complex macromolecular carbon sitting right on the rock’s surface. “To our knowledge, that’s the sha

Welcome to Edition 9.01 of the Rocket Report! Back in January, I wrote about the 20 launches and landings we were most excited about in 2026. The list included things that were, at the time, officially scheduled to occur this year. I also gave my own view of the probability of each of these events actually happening before December 31. Halfway through the year, we can only count one of the events as completed, and that was NASA's Artemis II mission in April. Many are now scheduled for next year,

Understanding the origin of life requires addressing a collection of overlapping scientific questions. We've made a lot of progress toward explaining how simple chemicals present on an early Earth built the complex molecules used by life and how some of those chemicals built the first genetic/catalytic molecules. But we're much further from understanding a key conundrum: How did membranes end up surrounding the first cells? It's relatively easy to make membranes spontaneously form in water, and

Near the end of May, the Office of Management and Budget (OMB) proposed a new rule that would govern how the federal government handles the grants it issues, including those that fund the vast majority of scientific research in the US. If formalized, the rule would make political priorities the prime determinant of what science gets funded and sideline the opinions of scientific experts. Grants could be canceled due to political whims, and new layers of bureaucracy would inhibit basic scientific

US homeowners have embraced home batteries in record-breaking numbers in early 2026, spurred on by state incentives while seeking to offset rising residential electricity costs. The trend could even unlock a more flexible energy supply for power grid operators and even AI data centers. New home battery installations reached a record 673 megawatts of energy storage in the first quarter of 2026, according to the US Energy Information Administration. That trend was driven by states with high electr

Fatemeh Rastekar, Niloofar Alaei Kakhki and Morteza Monfared discuss the safe and practical utility of superworm larvae for cleaning museum specimens. Credit: Anthony Lewis, PLOS/CC-BY 4.0 Fatemeh Rastekar, Niloofar Alaei Kakhki and Morteza Monfared discuss the safe and practical utility of superworm larvae for cleaning museum specimens. Credit: Anthony Lewis, PLOS/CC-BY 4.0 Preparing skeletal specimens for display in museums or f

It’s a regrettable reality that there is never enough time to cover all the interesting scientific stories we come across. So every month, we highlight a handful of the best stories that nearly slipped through the cracks.  June’s list includes insight into the science of soccer's scissors feint; the physics of poo's distinctive coiled shape; a boron buckyball; and the latest breakthrough in the ongoing Vesuvius challenge to decipher the Herculaneum scrolls. The science of soccer's scissors feint

A new state law limits Florida communities’ aims to offset greenhouse gas emissions that are warming the global climate and intensifying disasters such as hurricanes. Specifically, HB 1217 prohibits local governments from pursuing net-zero emissions goals. At least 10 cities and counties have implemented such policies, including Fort Lauderdale, Miami, Orlando, and Leon County, where Tallahassee, the state capital, is located. But the new law will not necessarily upend these policies, said Bradl

Antibiotic resistance has loomed over humans since the moment we started using antibiotics. In the 20th century, the drugs downgraded potentially life-threatening bacterial infections to mere inconveniences—a miracle of modern medicine, it seemed. But the drugs aren't really a human invention; we mostly swiped them from microbes, which have been locked in an arms race with each other for centuries. Microbial evolution has crafted both deadly molecules and clever tricks to dodge death as the wee

In May, the federal government announced without warning that it would take apart a network of ocean monitoring systems that it had spent over $350 million to build. No reason was given for the decision to shut down the Ocean Observatories Initiative (OOI), but suspicion immediately focused on the network's role in tracking climate change. But the OOI also provides data that's useful for weather forecasting and fisheries management, leading to widespread opposition. Today, it appears that the op

Plague swept through groups of hunter-gatherers in southeastern Siberia 5,500 years ago, leaving dozens dead in its wake—with DNA from Yersinia pestis bacteria still trapped inside their teeth. University of Oxford ancient DNA researcher Ruairidh Macleod and his colleagues recently sequenced the telltale bacterial DNA in teeth from plague victims at four ancient cemeteries in the area around Russia’s Lake Baikal. The tragedy that befell these communities is now the earliest known plague outbreak

Quantum computing news usually picks up near the end of the year, as companies try to provide evidence that they are hitting benchmarks on time. However, there have been interesting announcements as the summer starts this year, from incremental progress to attention-grabbing promises. As we did earlier this month, Ars has a rundown of some of the most significant announcements. These include a promise of useful, error-corrected quantum computing as soon as 2028, details on an updated trapped ion

Last week, we looked at a new study of the origin of complex cells, one that showed that our ancestors' genomes were pieced together from bits and pieces of multiple species. It put a spotlight on a phenomenon called horizontal gene transfer, in which a gene from one species is incorporated into the genome of a distantly related species. The frequency of horizontal gene transfer means that, in addition to the neatly branching trees that relate species by common descent, there are small threads c

The Trump administration has abandoned its effort to halt wind energy projects across the United States and dropped its challenge to the court ruling that tossed President Donald Trump’s order freezing federal permitting and leasing for wind projects. States that challenged the order hailed the development as one of the most significant legal victories against the Trump White House’s campaign against the energy transition. On Monday, the US Court of Appeals for the First Circuit dismissed the ap