Science – Page 4

A quirky guide to myths and lore based in actual science

books, culture, Folklore, geomythology, history, Mythopedia, natural history, Science / Tim Belzer / December 29, 2025

Folklorist/historian Adrienne Mayor on her new book Mythopedia: A Brief Compendium of Natural History Lore

Credit: Princeton University Press

Earthquakes, volcanic eruption, eclipses, meteor showers, and many other natural phenomena have always been part of life on Earth. In ancient cultures that predated science, such events were often memorialized in myths and legends. There is a growing body of research that strives to connect those ancient stories with the real natural events that inspired them. Folklorist and historian Adrienne Mayor has put together a fascinating short compendium of such insights with Mythopedia: A Brief Compendium of Natural History Lore, from dry quicksand and rains of frogs to burning lakes, paleoburrows, and Scandinavian “endless winters.”

Mayor’s work has long straddled multiple disciplines, but one of her specialities is best described as geomythology, a term coined in 1968 by Indiana University geologist Dorothy Vitaliano, who was interested in classical legends about Atlantis and other civilizations that were lost due to natural disasters. Her interest resulted in Vitaliano’s 1973 book Legends of the Earth: Their Geologic Origins.

Mayor herself became interested in the field when she came across Greek and Roman descriptions of fossils, and that interest expanded over the years to incorporate other examples of “folk science” in cultures around the world. Her books include The Poison King: The Life and Legend of Mithradates, Rome’s Deadliest Enemy (2009), as well as Greek Fire, Poison Arrows, & the Scorpion Bombs (2022), exploring the origins of biological and chemical warfare. Her 2018 book, Gods and Robots: Myths, Machines, and Ancient Dreams of Technology, explored ancient myths and folklore about creating automation, artificial life, and AI, connecting them to the robots and other ingenious mechanical devices actually designed and built during that era.

When her editor at Princeton University Press approached her about writing a book on geomythology, she opted for an encyclopedia format, which fit perfectly into an existing Princeton series of little encyclopedias about nature. “In this case, I wasn’t going to be working with just Greek and Roman antiquity,” Mayor told Ars. “I had collected very rich files on geomyths around the world. There are even a few modern geomyths in there. You can dip into whatever you’re interested in and skip the rest. Or maybe later you’ll read the ones that didn’t seem like they would be of interest to you but they’re absolutely fascinating.”

Mythopedia is also a true family affair, in that illustrator Michelle Angel is Mayor’s sister. “She does figures and maps for a lot of scholarly books, including mine,” said Mayor. “She’s very talented at making whimsical illustrations that are also very scientifically accurate. She really added information not only to the essays but to the illustrations for Mythopedia.

As she said, Mayor even includes a few modern geomyths in her compendium, as well as imagining in her preface what kind of geomyths might be told thousands of years from today about the origins of climate change for example, or the connection between earthquakes and fracking. “How will people try to explain the perplexing evidence that they’ll find on the planet Earth and maybe on other planets?” she said. “How will those stories be told?”

Ars caught up with Mayor to learn more.

book opened to a particular page, lying on a moss covered rock — Credit: Princeton University Press

Ars Technica: Tell us a little about the field of geomythology.

Adrienne Mayor: It’s a relatively new field of study but it took off around 2000. Really, it’s a storytelling that has existed since the first humans started talking to one another and investigating their landscape. I think geomyths are attempts to explain perplexing evidence in nature—on the Earth or in the sky. So geomyth is a bit of a misnomer since it can also cover celestial happenings. But people have been trying to explain bizarre things, or unnatural looking things, or inexplicable things in their landscape and their surroundings since they could first speak.

These kind of stories were probably first told around the first fires that human beings made as soon as they had language. So geomyths are attempts to explain, as I say, but they also contain memories that are preserved in oral traditions. These are cultures that are trying to understand earthshaking events like volcanoes or massive floods, tsunamis, earthquakes, avalanches—things that really change the landscape and have an impact on their culture. Geomyths are often expressed in metaphors and poetic, even supernatural language, and that’s why they’ve been ignored for a long time because people thought they were just storytelling or fiction.

But the ones that are about nature, about natural disasters, are based on very keen observations and repeated observations of the landscape. They also can contain details that are recognizable to scientists who study earthquakes or volcanoes. The scientists then realized that there had to be, in some cases, eyewitness accounts of these geomyths. Geomythology is actually enhancing our scientific understanding of the history of Earth over time. It can help people who study climate change figure out how far back certain climate changes have been happening. They can shed light on how and when great geological upheavals actually occurred and how humans responded to them.

Ars Technica: How long can an oral tradition about a natural disaster really persist?

Adrienne Mayor: That was one of the provocative questions. Can it really persist over centuries, thousands of years, millennia? For a long time people thought that oral traditions could not persist for that long. But it turns out that with detailed studies of geomyths that can be related to datable events like volcanoes or earthquakes or tsunamis from geophysical evidence, we now know that the myths can last thousands of years.

For instance, the one that is told by the Klamath Indians about the creation of Crater Lake in Oregon that happened about 7,000 years ago—the details in their myth show that there were eyewitness accounts. Archaeologists have found a particular kind of woven sandal that was used by indigenous peoples 9,000 to 5,000 years ago. They found those sandals both above and below the ash from the volcano that exploded. So we have two ways of dating that. In Australia, people who study the geomyths of the Aborigines can relate their stories to events that happened 20,000 years ago.

Ars Technica: You mentioned that your interest in geomythology grew out of Greek and Roman interpretations of certain fossils that they found.

Adrienne Mayor: That really did trigger it, because it occurred to me that oral traditions and legends—rather than myths about gods and heroes—the ones that are about nature seem to have kernels of truth because it could be reaffirmed and confirmed and supported by evidence that people see over generations. I was in Greece and saw some fossils that had been plowed up by farmers on the island of Samos, thigh-bones from a mastodon or a mammoth or a giant rhinoceros. The museum curator said, “Yes, farmers bring us these all the time.” And I thought, why hasn’t it occurred to anyone that they were doing this in antiquity as well?

I read through about 30 different Greek and Roman authors from the time of Homer up through Augustine, and found more than a hundred incidents of finding remarkable bones of strange shape, gigantic bones that were inexplicable. How did they try to explain them? That’s really what got me going. These stories had all been dismissed as travelers’ tales or superstition. But I talked with paleontologists and found that if I superimposed a map of all the Greek and Roman finds of remarkable remains of giants or monsters, it actually matched the paleontological map of deposits of megafauna—not dinosaurs, but megafauna like mastodons and mammoths.

Also, I grew up in South Dakota where there were a lot of fossils, so I had always wondered what Native Americans had thought about dinosaur fossils. It turns out no one had asked them either. So my second book was Fossil Legends of the First Americans. In that case, I knew the geography of all the deposits of dinosaur fossils. I just had to drive about 6,000 miles around to reservations, talking to storytellers and elders and ordinary people to try and excavate the folklore. So I sometimes would read a scientific report in the media and think, “here’s got to be oral traditions about this,” and then I find them. And sometimes I find the myth and seek the historical or scientific kernels embedded in it.

Ars Technica: What were your criteria for narrowing your list down to just 53 myths?

Adrienne Mayor: I had to do something for every letter; that was a challenge. A few other authors in the series actually skipped the hard letters. I started out with the hard letters like Q, W, X, Z, Y. My husband says I almost got mugged by the letter Q because I got so obsessed with quicksand. I started talking about writing a book about quicksand because I was so obsessed with sand. There are singing sand dunes.

Ars Technica: There’s been a lot of research on the physics of singing sand dunes.

Adrienne Mayor: Yes. Isn’t that amazing? There are even some humorous stories. One of my favorites is that Muslim pilgrims in the medieval period would travel to special singing sand dunes between Afghanistan and Iran. When pilgrims would feel the need to relieve themselves, they would try to find some privacy, yet urinating and defecating on the sand dune caused a very loud drum roll sound.

Ars Technica: Your work necessarily spans multiple disciplines in both the sciences and the humanities. Has that been a challenge?

Adrienne Mayor: I’ve built my career since my first book in 2000 on trying to write not only to other disciplines, but to ordinary educated readers. Some people think it feels like walking a tight rope, but not to me because I don’t have a canonical academic career. I’m an autodidact, I’m not really an academic. So I have absolutely no problem trespassing in all kinds of disciplines. And I depend on the generosity of all these experts.

Some are from the classics and humanities, but an awful lot of them are from scientific disciplines. I think there’s a big tendency to want to collaborate. It’s just that in academia it’s been difficult because people are siloed. So I feel like I have worked as a bridge between the two. Scientists seem very excited to find out that there are epic poems discussing exactly what they’re studying. Paleontologists were thrilled to discover that people were noticing fossils more than 2000 years ago. So the impulse and the desire to collaborate is there.

Jennifer is a senior writer at Ars Technica with a particular focus on where science meets culture, covering everything from physics and related interdisciplinary topics to her favorite films and TV series. Jennifer lives in Baltimore with her spouse, physicist Sean M. Carroll, and their two cats, Ariel and Caliban.

A quirky guide to myths and lore based in actual science Read More »

Embark on a visual voyage of art inspired by black holes

art and science, black holes, books, culture, Science, science history / Paul Patrick / December 26, 2025

Gamwell sees echoes of Mitchell’s dark stars, for instance, in Edgar Allan Poe’s short story, “A Descent Into the Maelstrom,” particularly the evocative 1919 illustration by Harry Clarke. “This seemed to have been an early analogy to a black hole for many people when the concept was first proposed,” said Gamwell. “It’s a mathematical construct at that point and it’s very difficult to imagine a mathematical construct. Poe actually envisioned a dark star [elsewhere in his writings].”

The featured art spans nearly every medium: charcoal sketches, pen-and-ink drawings, oil or acrylic paintings, murals, sculptures, traditional and digital photography, and immersive room-sized multimedia installations, such as a 2021-2022 piece called Gravitational Arena by Chinese artist Xu Bing. “Xu Bing does most of his work about language,” said Gamwell. For Gravitational Arena, “He takes a quote about language from Wittgenstein and translates it into his own script, the English alphabet written to resemble Chinese characters. Then he applies gravity to it and makes a singularity. [The installation] is several stories high and he covered the gallery floor with a mirror. So you walk upstairs and you see it’s like a wormhole, which he turns into an analogy for translation.”

“Anything in the vicinity of a black hole is violently torn apart owing to its extreme gravity—the strongest in the universe,” Gamwell writes about the enduring appeal of black holes as artistic inspiration. “We see this violence in the works of artists like Cai Guo- Qiang and Takashi Murakami, who have used black holes to symbolize the brutality unleashed by the atomic bomb. The inescapable pull of a black hole is also a ready metaphor for depression in the work of artists such as Moonassi. Thus, on the one hand, the black hole provides artists with a symbol to express the devastations and anxieties of the modern world. On the other hand, however, a black hole’s extreme gravity is the source of stupendous energy, and artists such as Yambe Tam invite viewers to embrace darkness as a path to transformation, awe, and wonder.”

One of the earliest scientific images of a black hole, 1979. Ink on paper, reversed photographically. Jean-Pierre Luminet/Astronomy and Astrophysics 1979

Embark on a visual voyage of art inspired by black holes Read More »

Being Santa Claus is a year-round calling

psychology, santa claus, Science / Kris Guyer / December 24, 2025

Not just a seasonal gig

Frankly, what’s most interesting about the paper isn’t those three fundamental categories, but the personalized glimpses it gives of the people who choose to become professional Santas. While a few Santas might make six figures, most do not, and may even lose money being Santa—they do it anyway for the sheer love of it. Professional Santas usually don’t see the role as seasonal; many build their identities around it, whether they fit the stereotypical Kris Kringle image or not. “My feeling is, if you’re Santa all the time, you have to live as Santa and give up whoever you are,” said one subject. “I’m just striving to be a better person.”

They’ll wear red and green all year round, for instance, or maintain a full white beard. One Santa trained himself to make “Ho, ho, ho!” his natural laugh. Another redecorated his house as “Santa’s house,” complete with Christmas trees and Santa figurines.

Sometimes it’s viewed as a role: a gay professional Santa, for instance, deliberately suppresses his sexual orientation when playing Santa, complete with partnering with a Mrs. Claus for public appearances. However, a female Santa who goes by Lynx (professional Santas typically take on pseudonyms) who is also a church leader, likens the job to a divine calling: “I can connect with people and remind them they’re loved,” she said. (She also binds her breasts when in costume because “Santa doesn’t have them double-Ds.”)

Perhaps that sense of a higher calling is why even non-prototypical Santas like Lynx persevere in the fact of occasional rejection. One Black Santa recalled being denied the position at a big box store once the interviewer found out his ethnicity, telling him the store didn’t hire Black or Hispanic Santas. “That hurt my heart so much,” he said. A disabled Santa who uses a scooter during parades recalled being criticized by other professional Santas for doing so—but stuck with it.

And while Bad Santa (2003) might be a fun holiday watch, actual “bad Santas” caught smoking, drinking, swearing, or otherwise behaving inappropriately are not popular figures within their community. “You’re never off,” one subject opined. “You lose a little bit of your identity because you can’t let your hair down and be yourself. You don’t know who’s watching you.”

“You’re Santa Claus 24 hours a day, seven days a week, 52 weeks a year,” another Santa said. “If you act out, you risk shattering the magic.”

DOI: Academy of Management Journal, 2025. 10.5465/amj.2023.1161 (About DOIs).

Being Santa Claus is a year-round calling Read More »

China just carried out its second reusable launch attempt in three weeks

Science, Space / Paul Patrick / December 23, 2025

For the second time this month, a Chinese rocket designed for reuse successfully soared into low-Earth orbit on its first flight Monday, defying the questionable odds that burden the debuts of new launch vehicles.

The first Long March 12A rocket, roughly the same height and diameter of SpaceX’s workhorse Falcon 9, lifted off from the Jiuquan Satellite Launch Center at 9: 00 pm EST Monday (02: 00 UTC Tuesday).

Less than 10 minutes later, rocket’s methane-fueled first stage booster hurtled through the atmosphere at supersonic speed, impacting in a remote region about 200 miles downrange from the Jiuquan spaceport in northwestern China. The booster failed to complete a braking burn to slow down for landing at a prepared location near the edge of the Gobi Desert.

The Long March 12A’s upper stage performed as intended, successfully reaching the mission’s “predetermined orbit,” said the China Aerospace Science and Technology Corporation (CASC), the state-owned enterprise that leads the country’s space industry.

“The first stage failed to be successfully recovered,” the corporation said in a statement. “The specific reasons are currently under further analysis and investigation.”

A stable of reusable rockets

This outcome resembles the results from the first flight of another medium-class Chinese rocket, the Zhuque-3, on December 2. The Zhuque-3 rocket was developed by a privately-funded startup named LandSpace. Similar in size and performance to the Long March 12A, the Zhuque-3 also reached orbit on its first launch, and its recoverable booster stage crashed during a downrange landing attempt. The Zhuque-3’s first stage came down next to its landing zone, while the Long March 12A appears to have missed by at least a couple of miles.

“Although this mission did not achieve the planned recovery of the rocket’s first stage, it obtained critical engineering data under the rocket’s actual flight conditions, laying an important foundation for subsequent launches and reliable recovery of the stages,” CASC said. “The research and development team will promptly conduct a comprehensive review and technical analysis of this test process, fully investigate the cause of the failure, continuously optimize the recovery plan, and continue to advance reusable technology verification.”

China just carried out its second reusable launch attempt in three weeks Read More »

When clouds flock together

atmospheric science, clouds, global climate change, Science, syndication / Tim Belzer / December 23, 2025

Scientists discover that clumping clouds supercharge storms in surprising ways.

Caroline Muller looks at clouds differently than most people. Where others may see puffy marshmallows, wispy cotton candy or thunderous gray objects storming overhead, Muller sees fluids flowing through the sky. She visualizes how air rises and falls, warms and cools, and spirals and swirls to form clouds and create storms.

But the urgency with which Muller, a climate scientist at the Institute of Science and Technology Austria in Klosterneuburg, considers such atmospheric puzzles has surged in recent years. As our planet swelters with global warming, storms are becoming more intense, sometimes dumping two or even three times more rain than expected. Such was the case in Bahía Blanca, Argentina, in March 2025: Almost half the city’s yearly average rainfall fell in less than 12 hours, causing deadly floods.

Atmospheric scientists have long used computer simulations to track how the dynamics of air and moisture might produce varieties of storms. But existing models hadn’t fully explained the emergence of these fiercer storms. A roughly 200-year-old theory describes how warmer air holds more moisture than cooler air: an extra 7 percent for every degree Celsius of warming. But in models and weather observations, climate scientists have seen rainfall events far exceeding this expected increase. And those storms can lead to severe flooding when heavy rain falls on already saturated soils or follows humid heatwaves.

Clouds, and the way that they cluster, could help explain what’s going on.

A growing body of research, set in motion by Muller over a decade ago, is revealing several small-scale processes that climate models had previously overlooked. These processes influence how clouds form, congregate, and persist in ways that may amplify heavy downpours and fuel larger, long-lasting storms. Clouds have an “internal life,” Muller says, “that can strengthen them or may help them stay alive longer.”

Other scientists need more convincing, because the computer simulations researchers use to study clouds reduce planet Earth to its simplest and smoothest form, retaining its essential physics but otherwise barely resembling the real world.

Now, though, a deeper understanding beckons. Higher-resolution global climate models can finally simulate clouds and the destructive storms they form on a planetary scale — giving scientists a more realistic picture. By better understanding clouds, researchers hope to improve their predictions of extreme rainfall, especially in the tropics where some of the most ferocious thunderstorms hit and where future rainfall projections are the most uncertain.

First clues to clumping clouds

All clouds form in moist, rising air. A mountain can propel air upward; so, too, can a cold front. Clouds can also form through a process known as convection: the overturning of air in the atmosphere that starts when sunlight, warm land or balmy water heats air from below. As warm air rises, it cools, condensing the water vapor it carried upwards into raindrops. This condensation process also releases heat, which fuels churning storms.

But clouds remain one of the weakest links in climate models. That’s because the global climate models scientists use to simulate scenarios of future warming are far too coarse to capture the updrafts that give rise to clouds or to describe how they swirl in a storm—let alone to explain the microphysical processes controlling how much rain falls from them to Earth.

To try to resolve this problem, Muller and other like-minded scientists turned to simpler simulations of Earth’s climate that are able to model convection. In these artificial worlds, each the shape of a shallow box typically a few hundred kilometers across and tens of kilometers deep, the researchers tinkered with replica atmospheres to see if they could figure out how clouds behaved under different conditions.

The top frame of this computer simulation shows an atmosphere where the movements of air are somewhat disorganized, leading to clouds popping up in random locations. At the bottom is a simulation of an atmosphere where patterns of convection have become organized, and clouds spontaneously clump together into one large region—forming a storm.

Intriguingly, when researchers ran these models, the clouds spontaneously clumped together, even though the models had none of the features that usually push clouds together—no mountains, no wind, no Earthly spin or seasonal variations in sunlight. “Nobody knew why this was happening,” says Daniel Hernández Deckers, an atmospheric scientist at the National University of Colombia in Bogotá.

In 2012, Muller discovered a first clue: a process known as radiative cooling. The Sun’s heat that bounces off Earth’s surface radiates back into space, and where there are few clouds, more of that radiation escapes—cooling the air. The cool spots set up atmospheric flows that drive air toward cloudier regions—trapping more heat and forming more clouds. A follow-up study in 2018 showed that in these simulations, radiative cooling accelerated the formation of tropical cyclones. “That made us realize that to understand clouds, you have to look at the neighborhood as well—outside clouds,” Muller says.

Once scientists started looking not just outside clouds, but also underneath them and at their edges, they found other small-scale processes that help to explain why clouds flock together. The various processes, described by Muller and colleagues in the Annual Review of Fluid Mechanics, all bring or hold together pockets of warm, moist air so more clouds form in already-cloudy regions. These small-scale processes hadn’t been understood much before because they are often obscured by larger weather patterns.

Hernández Deckers has been studying one of the processes, called entrainment—the turbulent mixing of air at the edges of clouds. Most climate models represent clouds as a steady plume of rising air, but in reality “clouds are like a cauliflower,” he says. “You have a lot of turbulence, and you have these bubbles [of air] inside the clouds.” This mixing at the edges affects how clouds evolve and thunderstorms develop; it can weaken or strengthen storms in various ways, but, like radiative cooling, it encourages more clouds to form as a clump in regions that are already moist.

Such processes are likely to be most important in storms in Earth’s tropical regions, where there’s the most uncertainty about future rainfall. (That’s why Hernández Deckers, Muller, and others tend to focus their studies there.) The tropics lack the cold fronts, jet streams, and spiraling high- and low-pressure systems that dominate air flows at higher latitudes.

Supercharging heavy rains

There are other microscopic processes happening inside clouds that affect extreme rainfall, especially on shorter timescales. Moisture matters: Condensed droplets falling through moist, cloudy air don’t evaporate as much on their descent, so more water falls to the ground. Temperature matters too: When clouds form in warmer atmospheres, they produce less snow and more rain. Since raindrops fall faster than snowflakes, they evaporate less on their descent—producing, once again, more rain.

These factors also help explain why more rain can get squeezed from a cloud than the 7 percent rise per degree of warming predicted by the 200-year-old theory. “Essentially you get an extra kick … in our simulations, it was almost a doubling,” says Martin Singh, a climate scientist at Monash University in Melbourne, Australia.

Cloud clustering adds to this effect by holding warm, moist air together, so more rain droplets fall. One study by Muller and her collaborators found that clumping clouds intensify short-duration rainfall extremes by 30 to 70 percent, largely because raindrops evaporate less inside sodden clouds.

Other research, including a study led by Jiawei Bao, a postdoctoral researcher in Muller’s group, has likewise found that the microphysical processes going on inside clouds have a strong influence over fast, heavy downpours. These sudden downpours are intensifying much faster with climate change than protracted deluges, and often cause flash flooding.

The future of extreme rainfall

Scientists who study the clumping of clouds want to know how that behavior will change as the planet heats up—and what that will mean for incidences of heavy rainfall and flooding.

Some models suggest that clouds (and the convection that gives rise to them) will clump together more with global warming — and produce more rainfall extremes that often far exceed what theory predicts. But other simulations suggest that clouds will congregate less. “There seems to be still possibly a range of answers,” says Allison Wing, a climate scientist at Florida State University in Tallahassee who has compared various models.

Scientists are beginning to try to reconcile some of these inconsistencies using powerful types of computer simulations called global storm-resolving models. These can capture the fine structures of clouds, thunderstorms, and cyclones while also simulating the global climate. They bring a 50-fold leap in realism beyond the global climate models scientists generally use—but demand 30,000 times more computational power.

Using one such model in a paper published in 2024, Bao, Muller, and their collaborators found that clouds in the tropics congregated more as temperatures increased—leading to less frequent storms but ones that were larger, lasted longer, and, over the course of a day, dumped more rain than expected from theory.

But that work relied on just one model and simulated conditions from around one future time point—the year 2070. Scientists need to run longer simulations using more storm-resolving models, Bao says, but very few research teams can afford to run them. They are so computationally intensive that they are typically run at large centralized hubs, and scientists occasionally host “hackathons” to crunch through and share data.

Researchers also need more real-world observations to get at some of the biggest unknowns about clouds. Although a flurry of recent studies using satellite data linked the clustering of clouds to heavier rainfall in the tropics, there are large data gaps in many tropical regions. This weakens climate projections and leaves many countries ill-prepared. In June of 2025, floods and landslides in Venezuela and Colombia swept away buildings and killed at least a dozen people, but scientists don’t know what factors worsened these storms because the data are so paltry. “Nobody really knows, still, what triggered this,” Hernández Deckers says.

New, granular data are on their way. Wing is analyzing rainfall measurements from a German research vessel that traversed the tropical Atlantic Ocean for six weeks in 2024. The ship’s radar mapped clusters of convection associated with the storms it passed through, so the work should help researchers see how clouds organize over vast tracts of the ocean.

And an even more global view is on the horizon. The European Space Agency plans to launch two satellites in 2029 that will measure, among other things, near-surface winds that ruffle Earth’s oceans and skim mountaintops. Perhaps, scientists hope, the data these satellites beam back will finally provide a better grasp of clumping clouds and the heaviest rains that fall from them.

Research and interviews for this article were partly supported through a journalism residency funded by the Institute of Science & Technology Austria (ISTA). ISTA had no input into the story. This story originally appeared on Knowable Magazine.

Knowable Magazine explores the real-world significance of scholarly work through a journalistic lens.

When clouds flock together Read More »

In a surprise announcement, Tory Bruno is out as CEO of United Launch Alliance

atlas v, Boeing, launch, Lockheed Martin, Science, Space, tory bruno, united launch alliance, vulcan / Tim Belzer / December 22, 2025

The retirement of the Atlas V and Delta IV led to a period of downsizing for United Launch Alliance, with layoffs and facility closures in Florida, California, Alabama, Colorado, and Texas. In a further sign of ULA’s troubles, SpaceX won a majority of US military launch contracts for the first time last year.

Bruno, 64, served as a genial public face for ULA amid the company’s difficult times. He routinely engaged with space enthusiasts on social media, fielded questions from reporters, and even started a podcast. Bruno’s friendly and accessible demeanor was unusual among industry leaders, especially those with ties to large legacy defense contractors.

ULA is a 50-50 joint venture between Boeing and Lockheed Martin, which merged their rocket divisions in 2006. Bruno’s plans did not always enjoy full support from ULA’s corporate owners. For example, Boeing and Lockheed initially only approved tranches of funding for developing the new Vulcan rocket on a quarterly basis. Beginning before Bruno’s arrival and extending into his tenure as CEO, ULA’s owners slow-walked development of an advanced upper stage that might have become a useful centerpiece for an innovative in-space transport and refueling infrastructure.

There were also rumors in recent years of an impending sale of ULA by Boeing and Lockheed Martin, but nothing has materialized so far.

The third flight of the Vulcan rocket lifted off from Cape Canaveral Space Force Station, Florida, on August 12, 2025. Credit: United Launch Alliance

A statement from the co-chairs of ULA’s board, Robert Lightfoot of Lockheed Martin and Kay Sears of Boeing, did not identify a reason for Bruno’s resignation, other than saying he is stepping down “to pursue another opportunity.”

“We are grateful for Tory’s service to ULA and the country, and we thank him for his leadership,” the board chairs said in a statement.

John Elbon, ULA’s chief operating officer, will take over as interim CEO effective immediately, the company said.

“We have the greatest confidence in John to continue strengthening ULA’s momentum while the board proceeds with finding the next leader of ULA,” the company said. “Together with Mark Peller, the new COO, John’s career in aerospace and his launch expertise is an asset for ULA and its customers, especially for achieving key upcoming Vulcan milestones.”

In a post on X, Bruno thanked ULA’s owners for the opportunity to lead the company. “It has been a great privilege to lead ULA through its transformation and to bring Vulcan into service,” he wrote. “My work here is now complete and I will be cheering ULA on.”

In a surprise announcement, Tory Bruno is out as CEO of United Launch Alliance Read More »

US blocks all offshore wind construction, says reason is classified

Department of Defense, department of Interior, green, offshore wind, Policy, renewable energy, Science, Trump, Wind / Rejus Almole / December 22, 2025

On Monday, the US Department of the Interior announced that it was pausing the leases on all five offshore wind sites currently under construction in the US. The move comes despite the fact that these projects already have installed significant hardware in the water and on land; one of them is nearly complete. In what appears to be an attempt to avoid legal scrutiny, the Interior is blaming the decisions on a classified report from the Department of Defense.

The second Trump administration announced its animosity toward offshore wind power literally on day one, issuing an executive order on inauguration day that called for a temporary halt to issuing permits for new projects pending a re-evaluation. Earlier this month, however, a judge vacated that executive order, noting that the government has shown no indication that it was even attempting to start the re-evaluation it said was needed.

But a number of projects have gone through the entire permitting process, and construction has started. Before today, the administration had attempted to stop these in an erratic, halting manner. Empire Wind, an 800 MW farm being built off New York, was stopped by the Department of the Interior, which alleged that it had been rushed through permitting. That hold was lifted following lobbying and negotiations by New York and the project developer Orsted, and the Department of the Interior never revealed why it changed its mind. When the Interior Department blocked a second Orsted project, Revolution Wind offshore of southern New England, the company took the government to court and won a ruling that let it continue construction.

US blocks all offshore wind construction, says reason is classified Read More »

Rocket Report: Russia pledges quick fix for Soyuz launch pad; Ariane 6 aims high

ariane 6, Arianespace, atlas v, china, falcon 9, launch, rocket lab, rocket report, Science, Space, spacex, starship, united launch alliance / Mike M. / December 20, 2025

South Korean rocket startup Innospace is poised to debut a new nano-launcher.

The fifth Ariane 6 rocket climbs away from Kourou, French Guiana, with two European Galileo navigation satellites. Credit: ESA-CNES-Arianespace

Welcome to Edition 8.23 of the Rocket Report! Several new rockets made their first flights this year. Blue Origin’s New Glenn was the most notable debut, with a successful inaugural launch in January followed by an impressive second flight in November, culminating in the booster’s first landing on an offshore platform. Second on the list is China’s Zhuque-3, a partially reusable methane-fueled rocket developed by the quasi-commercial launch company LandSpace. The medium-lift Zhuque-3 successfully reached orbit on its first flight earlier this month, and its booster narrowly missed landing downrange. We could add China’s Long March 12A to the list if it flies before the end of the year. This will be the final Rocket Report of 2025, but we’ll be back in January with all the news that’s fit to lift.

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.

Rocket Lab delivers for Space Force and NASA. Four small satellites rode a Rocket Lab Electron launch vehicle into orbit from Virginia early Thursday, beginning a government-funded technology demonstration mission to test the performance of a new spacecraft design, Ars reports. The satellites were nestled inside a cylindrical dispenser on top of the 59-foot-tall (18-meter) Electron rocket when it lifted off from NASA’s Wallops Flight Facility. A little more than an hour later, the rocket’s upper stage released the satellites one at a time at an altitude of about 340 miles (550 kilometers). The launch was the starting gun for a proof-of-concept mission to test the viability of a new kind of satellite called DiskSats, designed by the Aerospace Corporation.

Stack ’em high… “DiskSat is a lightweight, compact, flat disc-shaped satellite designed for optimizing future rideshare launches,” the Aerospace Corporation said in a statement. The DiskSats are 39 inches (1 meter) wide, about twice the diameter of a New York-style pizza, and measure just 1 inch (2.5 centimeters) thick. Made of composite carbon fiber, each satellite carries solar cells, control avionics, reaction wheels, and an electric thruster to change and maintain altitude. The flat design allows DiskSats to be stacked one on top of the other for launch. The format also has significantly more surface area than other small satellites with comparable mass, making room for more solar cells for high-power missions or large-aperture payloads like radar imaging instruments or high-bandwidth antennas. NASA and the US Space Force cofunded the development and launch of the DiskSat demo mission.

The easiest way to keep up with Eric Berger’s and Stephen Clark’s reporting on all things space is to sign up for our newsletter. We’ll collect their stories and deliver them straight to your inbox.

Sign Me Up!

SpaceX warns of dangerous Chinese launch. China’s recent deployment of nine satellites occurred dangerously close to a Starlink satellite, SpaceX’s vice president of Starlink engineering said. Michael Nicolls wrote in a December 12 social media post that there was a 200-meter close approach between a satellite launched December 10 on a Chinese Kinetica-1 rocket and SpaceX’s Starlink-6079 spacecraft at 560 kilometers (348 miles) altitude, Aviation Week and Space Technology reports. “Most of the risk of operating in space comes from the lack of coordination between satellite operators—this needs to change,” Nicolls wrote.

Blaming the customer... The company in charge of the Kinetica-1 rocket, CAS Space, responded to Nicolls’ post on X saying it would “work on identifying the exact details and provide assistance.” In a follow-up post on December 13, CAS Space said the close call, if confirmed, occurred nearly 48 hours after the satellite separated from the Kinetica-1 rocket, by which time the launch mission had long concluded. “CAS Space will coordinate with satellite operators to proceed.”

A South Korean startup is ready to fly. Innospace, a South Korean space startup, will launch its independently developed commercial rocket, Hanbit-Nano, as soon as Friday, the Maeil Business Newspaper reports. The rocket will lift off from the Alcântara Space Center in Brazil. The small launcher will attempt to deliver eight small payloads, including five deployable satellites, into low-Earth orbit. The launch was delayed two days to allow time for technicians to replace components of the first stage oxidizer supply cooling system.

Hybrid propulsion… This will be the first launch of Innospace’s Hanbit-Nano rocket. The launcher has two stages and stands 71 feet (21.7 meters) tall with a diameter of 4.6 feet (1.4 meters). Hanbit-Nano is a true micro-launcher, capable of placing up to 200 pounds (90 kilograms) of payload mass into Sun-synchronous orbit. It has a unique design, with hybrid engines consuming a mix of paraffin as the fuel and liquid oxygen as the oxidizer.

Ten years since a milestone in rocketry. On December 21, 2015, SpaceX launched the Orbcomm-2 mission on an upgraded version of its Falcon 9 rocket. That night, just days before Christmas, the company successfully landed the first stage for the first time. Ars has reprinted a slightly condensed chapter from the book Reentry, authored by Senior Space Editor Eric Berger and published in 2024. The chapter begins in June 2015 with the failure of a Falcon 9 rocket during launch of a resupply mission to the International Space Station and ends with a vivid behind-the-scenes recounting of the historic first landing of a Falcon 9 booster to close out the year.

First-person account… I have my own memory of SpaceX’s first rocket landing. I was there, covering the mission for another publication, as the Falcon 9 lifted off from Cape Canaveral, Florida. In an abundance of caution, Air Force officials in charge of the Cape Canaveral spaceport closed large swaths of the base for the Falcon 9’s return to land. The decision shunted VIPs and media representatives to viewing locations outside the spaceport’s fence, so I joined SpaceX’s official press room at the top of a seven-floor tower near the Port Canaveral cruise terminals. The view was tremendous. We all knew to expect a sonic boom as the rocket came back to Florida, but its arrival was a jolt. The next morning, I joined SpaceX and a handful of reporters and photographers on a chartered boat to get a closer look at the Falcon 9 standing proudly after returning from space.

Roscosmos targets quick fix to Soyuz launch pad. Russian space agency Roscosmos says it expects a damaged launch pad critical to International Space Station operations to be fixed by the end of February, Aviation Week and Space Technology reports. “Launch readiness: end of February 2026,” Roscosmos said in a statement Tuesday. Russia had been scrambling to assess the extent of repairs needed to Pad 31 at the Baikonur Cosmodrome in Kazakhstan after the November 27 flight of a Soyuz-2.1a rocket damaged key elements of the infrastructure. The pad is the only one capable of supporting Russian launches to the ISS.

Best-case scenario… A quick repair to the launch pad would be the best-case scenario for Roscosmos. A service structure underneath the rocket was unsecured during the launch of a three-man crew to the ISS last month. The structure fell into the launch pad’s flame trench, leaving the complex without the service cabin technicians use to work on the Soyuz rocket before liftoff. Roscosmos said a “complete service cabin replacement kit” has arrived at the Baikonur Cosmodrome, and more than 130 staff are working in two shifts to implement the repairs. A fix by the end of February would allow Russia to resume cargo flights to the ISS in March.

Atlas V closes out an up-and-down year for ULA. United Launch Alliance aced its final launch of 2025, a predawn flight of an Atlas V rocket Tuesday carrying 27 satellites for Amazon’s recently rebranded Leo broadband Internet service, Spaceflight Now reports. The rocket flew northeast from Cape Canaveral to place the Amazon Leo satellites into low-Earth orbit. This was ULA’s fourth launch for Amazon’s satellite broadband venture, previously known as Project Kuiper. ULA closes out 2025 with six launches, one more than the company achieved last year. But ULA’s new Vulcan rocket launched just once this year, disappointingly short of the company’s goal to fly Vulcan up to 10 times.

Taking stock of Amazon Leo… This year marked the start of the deployment of Amazon’s operational satellites. There are now 180 Amazon Leo satellites in orbit after Tuesday’s launch, well short of the FCC’s requirement for Amazon to deploy half of its planned 3,232 satellites by July 31, 2026. Amazon won’t meet the deadline, and it’s likely the retail giant will ask government regulators for a waiver or extension to the deadline. Amazon’s factory is hitting its stride producing and delivering Amazon Leo satellites. The real question is launch capacity. Amazon has contracts to launch satellites on ULA’s Atlas V and Vulcan rockets, Europe’s Ariane 6, and Blue Origin’s New Glenn. Early next year, a batch of 32 Amazon Leo satellites will launch on the first flight of Europe’s uprated Ariane 64 rocket from Kourou, French Guiana. (submitted by EllPeaTea)

A good year for Ariane 6. Europe’s Ariane 6 rocket launched four times this year after a debut test flight in 2024. The four successful missions deployed payloads for the French military, Europe’s weather satellite agency, the European Union’s Copernicus environmental monitoring network, and finally, on Wednesday, the European Galileo navigation satellite fleet, Space News reports. This is a strong showing for a new rocket flying from a new launch pad and a faster ramp-up of launch cadence than any medium- or heavy-lift rocket in recent memory. All five Ariane 6 launches to date have used the Ariane 62 configuration with two strap-on solid rocket boosters. The more powerful Ariane 64 rocket, with four strap-on motors, will make its first flight early next year.

Aiming high… This was the first launch using the Ariane 6 rocket’s ability to fly long-duration missions lasting several hours. The rocket’s cryogenic upper stage, with a restartable Vinci engine, took nearly four hours to inject two Galileo navigation satellites into an orbit more than 14,000 miles (nearly 23,000 kilometers) above the Earth. The flight profile put more stress on the Ariane 6 upper stage than any of the rocket’s previous missions, but the rocket released its payloads into an on-target orbit. (submitted by EllPeaTea)

ESA wants to do more with Ariane 6’s kick stage. The European Space Agency plans to adapt a contract awarded to ArianeGroup in 2021 for an Ariane 6 kick stage to cover its evolution into an orbital transfer vehicle, European Spaceflight reports. The original contract was for the development of the Ariane 6’s Astris kick stage, an optional addition for Ariane 6 missions to deploy payloads into multiple orbits or directly inject satellites into geostationary orbit. Last month, ESA’s member states committed approximately 100 million euros ($117 million) to refocus the Astris kick stage into a more capable Orbital Transfer Vehicle (OTV).

Strong support from Germany… ESA’s director of space transportation, Toni Tolker-Nielsen, said the performance of the Ariane 6 OTV will be “well beyond” that of the originally conceived Astris kick stage. The funding commitment obtained during last month’s ESA ministerial council meeting includes strong support from Germany, Tolker-Nielsen said. Under the new timeline, a protoflight mode of the OTV is expected to be ready for ground qualification by the end of 2028, with an inaugural flight following in 2029. (submitted EllPeaTea)

Another Starship clone in China. Every other week, it seems, a new Chinese launch company pops up with a rocket design and a plan to reach orbit within a few years. For a long time, the majority of these companies revealed designs that looked a lot like SpaceX’s Falcon 9 rocket. Now, Chinese companies are starting to introduce designs that appear quite similar to SpaceX’s newer, larger Starship rocket, Ars reports. The newest entry comes from a company called “Beijing Leading Rocket Technology.” This outfit took things a step further by naming its vehicle “Starship-1,” adding that the new rocket will have enhancements from AI and is billed as being a “fully reusable AI rocket.”

Starship prime… China has a long history of copying SpaceX. The country’s first class of reusable rockets, which began flying earlier this month, show strong similarities to the Falcon 9 rocket. Now, it’s Starship. The trend began with the Chinese government. In November 2024, the government announced a significant shift in the design of its super-heavy lift rocket, the Long March 9. Instead of the previous design, a fully expendable rocket with three stages and solid rocket boosters strapped to the sides, the country’s state-owned rocket maker revealed a vehicle that mimicked SpaceX’s fully reusable Starship. At least two more companies have announced plans for Starship-like rockets using SpaceX’s chopstick-style method for booster recovery. Many of these launch startups will not grow past the PowerPoint phase, of course.

Next three launches

Dec. 19: Hanbit-Nano | Spaceward | Alcântara Launch Center, Brazil | 18: 45 UTC

Dec. 20: Long March 5 | Unknown Payload | Wenchang Space Launch Site, China | 12: 30 UTC

Dec. 20: New Shepard | NS-37 crew mission | Launch Site One, Texas | 14: 00 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.

Rocket Report: Russia pledges quick fix for Soyuz launch pad; Ariane 6 aims high Read More »

These are the flying discs the government wants you to know about

aerospace, DiskSat, electron rocket, rocket lab, Science, Space / Kris Guyer / December 20, 2025

DiskSat’s design offers “a power-to-weight ratio unmatched by traditional aluminum satellites.”

An artist’s illustration of DiskSats deploying from a rocket in low-Earth orbit. Credit: NASA

Four small satellites rode a Rocket Lab Electron launch vehicle into orbit from Virginia early Thursday, beginning a government-funded technology demonstration mission to test the performance of a new spacecraft design.

The satellites were nestled inside a cylindrical dispenser on top of the 59-foot-tall (18-meter) Electron rocket when it lifted off from NASA’s Wallops Flight Facility at 12: 03 am EST (05: 03 UTC). A little more than an hour later, the rocket’s upper stage released the satellites one at a time at an altitude of about 340 miles (550 kilometers).

The launch was the starting gun for a proof-of-concept mission to test the viability of a new kind of satellite called DiskSats. These satellites were designed by the Aerospace Corporation, a nonprofit federally funded research and development center. The project is jointly financed by NASA and the US Space Force, which paid for DiskSat’s development and launch, respectively.

“DiskSat is a lightweight, compact, flat disc-shaped satellite designed for optimizing future rideshare launches,” the Aerospace Corporation says in a statement.

The DiskSats are 39 inches (1 meter) wide, about twice the diameter of a New York-style pizza, and measure just 1 inch (2.5 centimeters) thick. Made of composite carbon fiber, each satellite carries solar cells, control avionics, reaction wheels, and an electric thruster to change and maintain altitude.

“The launch went perfectly, and the DiskSat dispenser worked exactly as designed,” said Darren Rowen, the project’s chief engineer, in a statement. “We’re pleased to have established contact with all four of the DiskSats, and we’re looking forward to the rest of the demonstration mission.”

An engineer prepares Aerospace Corporation’s DiskSats for launch at NASA’s Wallops Flight Facility in Virginia. Credit: Aerospace Corporation

A new form factor

The Aerospace Corporation has a long history of supporting the US military and NASA since its founding in 1960. A few years ago, engineers at the center developed the DiskSat concept after surveying the government’s emerging needs in spaceflight.

CubeSats have been a ubiquitous part of the satellite industry for nearly a quarter-century. They are based on a cube-shaped design, measuring about 10 centimeters per side, but can be scaled from a single cube “unit” to three, six, 12, or more, depending on mission requirements. The CubeSat standard has become a popular choice for commercial companies, the military, NASA, and universities looking to build small satellites on a tight budget.

By one measure, nearly 3,000 CubeSats have launched since the first one soared into orbit in 2003. After originally being confined to low-Earth orbit, they have now flown to high-altitude orbits, to the Moon, and to Mars.

While CubeSats are now prolific, engineers at the Aerospace Corporation saw an opportunity to improve on the concept. Debra Emmons, Aerospace’s chief technology officer, said the idea originated from Rich Welle, a scientist recently retired from the center’s Experiments Lab, or xLab, division.

“They were asking questions,” Emmons told Ars. “They were looking at CubeSat studies and looking at some alternatives. The typical CubeSat is, in fact, a cube. So, the idea was could you look at some different types of form factors that might be able to generate more power … and offer up benefit for certain mission applications?”

Aerospace’s research team arrived at the DiskSat design. Emmons said the stackable flat-panel format is easier to pack for launch than a CubeSat. The concept is similar to SpaceX’s pioneering approach to launching stackable Starlink Internet satellites, but DiskSats are significantly smaller, lighter, and adaptable to different kinds of missions.

A batch of Starlink satellites prior to launch — A stack of Starlink satellites prior to launch. Credit: SpaceX

DiskSats have several advantages over CubeSats, according to the Aerospace Corporation. Each of the four DiskSats launched Thursday has a mass of about 35 pounds (16 kilograms), less than that of a typical 12U CubeSat. But a DiskSat has more than 13 times the surface area on a single side, providing valuable real estate for developers to load up the satellite with power-generating solar arrays, sensors, antennas, or other payloads that simply won’t fit on a CubeSat.

SpaceX’s current generation of mass-produced Starlink V2 satellites, by comparison, each has a mass of more than 1,100 pounds, or 500 kilograms.

DiskSat’s design offers “a power-to-weight ratio unmatched by traditional aluminum satellites,” the Aerospace Corporation says. In a research paper published earlier this year, engineers from the Aerospace Corporation claimed DiskSat can generate five to 10 times more power than a CubeSat.

A disruptive solution?

What kinds of missions might DiskSat be useful for? One idea involves placing a large radar antenna—too big to fit on any other low-mass satellite—on the broadside of a DiskSat to collect all-weather surveillance imagery. Similarly-sized antennas on other DiskSats could support high-bandwidth communications.

With this demo mission, the Aerospace Corporation will test the performance of the DiskSat platform in space for the first time. Engineers will initially look at how the satellites function at 340 miles, then use their electric thrusters to gradually step down to lower altitudes, where another aspect of DiskSat’s design will shine.

Flying edge-on, the satellite’s pancake shape will minimize aerodynamic drag as the DiskSats encounter thicker air below 250 miles. Continual pulsing from the satellites’ electric thrusters will allow the DiskSats to maintain altitude as they glide through the uppermost layers of the atmosphere.

“The primary mission is to demonstrate and to understand the performance, functionality, and maneuverability of the DiskSat buses on orbit, particularly in low-Earth orbit, or LEO, and very low-Earth orbit, or VLEO,” said Catherine Venturini, DiskSat’s principal investigator.

“In theory, I think you could operate down to 200 kilometers (124 miles) with electric propulsion,” Emmons said. That is two to three times closer to Earth than most commercial radar imaging satellites. Other satellite operators are also assessing the viability of flying remote sensing missions in VLEO.

Flying closer to the ground delivers higher-resolution imagery, bringing cities, ships, airports, and military bases into sharper view. So it’s easy to see why the Space Force is interested in the DiskSat concept.

DiskSat’s engineers acknowledge there are drawbacks to the format. With such a large surface area, it’s more difficult to manage the temperature extremes of low-Earth orbit than it is with a conventional cube-shaped satellite. While DiskSats carry a lot of oomph to change altitude, their shape makes them somewhat clunky and hard to turn, and engineers say they aren’t well-suited for missions requiring agile pointing.

Rocket Lab’s Electron launcher lifts off to begin the DiskSat demo mission, a program co-funded by NASA and the US military’s Space Test Program. Credit: Austin DeSisto/Rocket Lab

The Aerospace Corporation is a research center, not a commercial satellite manufacturer. Officials at the nonprofit are looking to hand over the DiskSat design to industry through a technology transfer agreement. “The plan is to release or license the technology to partners once it is flight-proven,” the Aerospace Corporation says on its website.

“We think this new technology will be disruptive to the small spacecraft enterprise and ecosystem,” said Eric Breckheimer, DiskSat’s program manager.

DiskSat’s stackable design makes it possible to launch a fleet of high-power, low-mass satellites in one go, according to Emmons.

Following the trend toward bigger CubeSats, the DiskSat format could also grow larger to take advantage of heavier rockets. “There’s a key scalability aspect, and with that in mind, you could bring an entire constellation of DiskSats with you in a single launch,” Breckheimer said.

These are the flying discs the government wants you to know about Read More »

Parasites plagued Roman soldiers at Hadrian’s Wall

Archaeology, archaeoparasitology, Hadrian's Wall, paleoparasitology, parasitology, Science / Mike M. / December 20, 2025

It probably sucked to be a Roman soldier guarding Hadrian’s Wall circa the third century CE. W.H. Auden imagined the likely harsh conditions in his poem “Roman Wall Blues,” in which a soldier laments enduring wet wind and rain with “lice in my tunic and a cold in my nose.” We can now add chronic nausea and bouts of diarrhea to his list of likely woes, thanks to parasitic infections, according to a new paper published in the journal Parasitology.

As previously reported, archaeologists can learn a great deal by studying the remains of intestinal parasites in ancient feces. For instance, in 2022, we reported on an analysis of soil samples collected from a stone toilet found within the ruins of a swanky 7th-century BCE villa just outside Jerusalem. That analysis revealed the presence of parasitic eggs from four different species: whipworm, beef/pork tapeworm, roundworm, and pinworm. (It’s the earliest record of roundworm and pinworm in ancient Israel.)

Later that same year, researchers from the University of Cambridge and the University of British Columbia analyzed the residue on an ancient Roman ceramic pot excavated at the site of a 5th-century CE Roman villa at Gerace, a rural district in Sicily. They identified the eggs of intestinal parasitic worms commonly found in feces—strong evidence that the 1,500-year-old pot in question was most likely used as a chamber pot.

Other prior studies have compared fecal parasites found in hunter-gatherer and farming communities, revealing dramatic dietary changes, as well as shifts in settlement patterns and social organization coinciding with the rise of agriculture. This latest paper analyzes sediment collected from sewer drains at the Roman fort at Vindolanda, located just south of the defense fortification known as Hadrian’s Wall.

An antiquarian named William Camden recorded the existence of the ruins in a 1586 treatise. Over the next 200 years, many people visited the site, discovering a military bathhouse in 1702 and an altar in 1715. Another altar found in 1914 confirmed that the fort had been called Vindolanda. Serious archaeological excavation at the site began in the 1930s. The site is most famous for the so-called Vindolanda tablets, among the oldest surviving handwritten documents in the UK—and for the 2023 discovery of what appeared to be an ancient Roman dildo, although others argued the phallus-shaped artifact was more likely to be a drop spindle used for spinning yarn.

Parasites plagued Roman soldiers at Hadrian’s Wall Read More »

The evolution of expendability: Why some ants traded armor for numbers

ants, Biology, evolution, Science / Tim Belzer / December 19, 2025

“Ants reduce per-worker investment in one of the most nutritionally expensive tissues for the good of the collective,” Matte explains. “They’re shifting from self-investment toward a distributed workforce.”

Power of the collective

The researchers think the pattern they observed in ants reflects a more universal trend in the evolution of societal complexity. The transition from solitary life to complex societies echoes the transition from single-celled organisms to multicellular ones.

In a single-celled organism, a cell must be a “jack-of-all-trades,” performing every function necessary for survival. In a multicellular animal, however, individual cells often become simpler and more specialized, relying on the collective for protection and resources.

“It’s a pattern that echoes the evolution of multicellularity, where cooperative units can be individually simpler than a solitary cell, yet collectively capable of far greater complexity,” says Matte. Still, the question of whether underinvesting in individuals to boost the collective makes sense for creatures other than ants remains open, and it most likely isn’t as much about nutritional economics as it is about sex.

Expendable servants

The study focused on ants that already have a reproductive division of labor, one where workers do not reproduce. This social structure is likely the key prerequisite for the cheap worker strategy. For the team, this is the reason we haven’t, at least so far, found similar evolutionary patterns in more complex social organisms like wolves, which live in packs—or humans with their amazingly complex societies. Wolves and people are both social, but maintain a high degree of individual self-interest regarding reproduction. Ant workers could be made expendable because they don’t pass their own genes—they are essentially extensions of the queen’s reproductive strategy.

Before looking for signs of ant-like approaches to quality versus quantity dilemmas in other species, the team wants to take an even closer look at ants. Economo, Matte, and their colleagues seek to expand their analysis to other ant tissues, such as the nervous system and muscles, to see if the cheapening of individuals extends beyond the exoskeleton. They are also looking at ant genomes to see what genetic innovations allowed for the shift from quality to quantity. “We still need a lot of work to understand ants’ evolution,” Matte says.

Science Advances. 2025. DOI: 10.1126/sciadv.adx8068

The evolution of expendability: Why some ants traded armor for numbers Read More »

Trump’s energy secretary orders a Washington state coal plant to remain open

Science / Rejus Almole / December 19, 2025

The year-end emergency that does exist in Washington state has been caused by record-setting rainfall and widespread flooding. (President Donald Trump has declared a federal emergency and authorized disaster assistance.) Thousands of people have been displaced and damage to major highways will take months to repair.

“It is so ironic, when we have a real emergency, that they picked this time to fabricate an energy emergency,” said KC Golden, a member of the Northwest Power and Conservation Council, an interstate agency created by Congress to ensure reliable power while protecting the environment.

While there is no emergency electricity shortfall in the Pacific Northwest, the region, like much of the United States, does have a serious and worsening long-term electricity supply problem.

Washington and Oregon are home to about 100 data centers. Oregon is second only to Virginia in data center capacity, and the centers consume 11 percent of Oregon’s power supply, nearly three times the national average, according to the Sightline Institute, a Seattle think tank.

Energy use is rising along with the region’s booming high-tech economy, its outsized appetite for electric cars (The Seattle Times reported that 26 percent of new cars registered in Washington in October were EVs) and the climate-change-driven growth of home air-conditioning. The Northwest could face a 9-gigawatt shortfall of power by 2030, according to a recent utility-funded report by the energy consulting group E3. Nine gigawatts is roughly the electricity load of Oregon.

“We are facing a real energy supply challenge and we have been slow to take up that challenge,” said Golden, who represents Washington state on the Northwest power council.

The Pacific Northwest gets more of its power from hydroelectric dams than any other part of the country (60 percent in Washington), and the region has long been blessed with cheap electricity rates. But drought and changing weather patterns (less snow, more rain) have hammered the reliability of the system, which draws most of its power from big federal dams on the Columbia River, North America’s largest hydroelectric resource.

Trump’s energy secretary orders a Washington state coal plant to remain open Read More »