Astronomers have detected an atmosphere around a rocky exoplanet in the habitable zone of its star for the first time in history, signalling a major breakthrough in the search for alien life, according to a study published on Thursday in Science. 

The planet, known as LHS 1140-b, is about 5.6 times more massive than Earth and orbits a small dwarf star about 48 light years from our solar system. While scientists have discovered atmospheres around many giant gas planets in our galaxy—and even a few rocky exoplanets outside the habitable zone—the new detection of helium in the skies of LHS 1140-b marks the first direct evidence that a habitable-zone rocky world can host an atmosphere, which is a critical factor for assessing their potential to support life.

“For rockier Earth-like planets, it has been a huge challenge in the field to detect any atmospheres at all,” said Collin Cherubim, a NASA Hubble Fellow at the University of Chicago, in a call with 404 Media. “This has been a huge question in the field that so much time and energy has been devoted to answering.”

The new discovery “is really the first claim ever of any rocky exoplanet atmosphere in the habitable zone that could potentially have liquid water and really support life,” added Cherubim, who conducted the research while he was a PhD student at Harvard University. “That's what sets it apart and makes it really exciting.”

Scientists have previously inferred that some rocky exoplanets in the habitable zone might have atmospheres based on indirect evidence, such as measurements that show that their day and night temperatures are more moderate than expected, which could be explained either by an atmosphere, or other planet-wide effects. However, spotting an atmosphere around these rocky worlds is tricky because they tend to be so small compared to their stars, which is a challenge for precision observations.

Cherubim came at the problem with a new approach: He first developed theoretical models of rocky exoplanets that focused on mass fractionation, a process by which lighter molecules and atoms in the atmosphere escape into space, while heavier ones are left behind. These simulations predicted a new type of planet with thick skies closer to the surface, and a thinner upper atmosphere that allows helium to escape to space.

“Hydrogen is the lightest element and it's the easiest to blow off into space,” Cherubim explained. “My model was predicting that if your planet is in this sweet spot where you're blowing enough hydrogen away, but not too much that you're dragging helium, which is a bit heavier, along with it, then you can actually create a helium-dominated atmosphere over time.” 

“This is a newly-predicted class of planets, which should have very unique chemistry,” he added. 

Cherubim realized that this escaping helium might be detectable from Earth, and that the LHS 1140 system would be a prime candidate to test out the hypothesis. To that end, the team observed LHS 1140-b and another planet in the system, LHS 1140-c, over the course of 2024 and 2025 with the Warm Infrared Echelle (WINERED) Spectrograph on the Magellan Observatory in Chile.

The 2024 results revealed a strong signal of helium at LHS 1140-b, but no detection in 2025, which may mean that the helium escape varies over time. The team predicts that the planet has probably had its atmosphere for billions of years. The other planet, LHS 1140-c, did not show any signs of an atmosphere, which was also expected based on its orbit and characteristics.

The momentous discovery proves that atmospheres can exist around rocky worlds, including around dwarf stars, which are far more common than more massive stars like the Sun. Cherubim and his colleagues think it’s quite likely that LHS 1140-b has large amounts of liquid water on its surface, another key ingredient for life as we know it on Earth.

“When we think about habitability, we think about three high-level things,” Cherubim said. “We think the planet needs to be rocky for the most part. It can't be a gas-rich thing where the surface is molten, or like Jupiter where it's just all gas. It's got to be the right temperature to support surface liquid water, at least for Earth-like life, and it needs an atmosphere to hold that water in and to shield the surface from radiation.” 

“With this discovery, we now know LHS 1140-b has all three of those things, which is really exciting,” he added. “And it just happens to be a very nearby system to Earth, so it's very accessible.”

Whether alien life exists on LHS 1140-b remains an open question, but scientists have already been looking for signs of life, known as biosignatures, in its skies using the Hubble Space Telescope and the James Webb Space Telescope. So far, the search hasn’t turned up any obvious signs of life, but future efforts may be able to peer at this world in more detail. 

“I think this is the best place to be looking for biosignatures,” Cherubim concluded. “We're really excited to see what comes out of that.”

Welcome back to the Abstract! Here are the studies this week that busted their butts, scaled great heights, got it right, and discovered a new world.

First, Hannibal marched an army of men, horses, and elephants over the Alps to threaten Rome. Scientists ask the question: Just how hard did they grind? Then, the mouse at the top of the world, the ancient origins of handedness, and a throwback to the alien megastructures.

As always, for more of my work, check out my book First Contact: The Story of Our Obsession with Aliens, or subscribe to my personal newsletter the BeX Files. 

Try the Hannibal diet (no, not the Lecter one)

E. Berti & F. Vollrath. “Energy costs of Hannibal’s alpine crossing.” Proceedings of the National Academy of Sciences.

In 218 BC, the Carthaginian general Hannibal Barca marched an army of 46,000 men and 37 war elephants over the Alps to threaten Rome right at its doorstep. This brash advance in the Second Punic War has become one of the most legendary military moves of all time, even though Hannibal was ultimately unsuccessful in his mad dash to sack Rome.

Yet despite the prominent place of this march in history, the exact route that Hannibal took over the Alps remains unknown. Now, scientists have taken a fresh stab at the millennia-old mystery by calculating how much energy various route options would have cost the troops and elephants. Though experts have generally considered a route called the Col du Clapier to be most likely, the new results suggest an alternate route known as the Col de la Traversette would have exacted less energy from the advancing army, which might have boosted its odds as Hannibal’s choice of crossing.

“Most of the discussions concerning Hannibal’s crossing were guided by philological and geological considerations, which tend to ignore the biology of the men and animals,” said authors Emilio Berti of Halle-Jena-Leipzig and Fritz Vollrath of the University of Oxford. 

“Compared to choosing the Col de la Traversette, the routes via the Col de Montgenèvre, Col du Clapier, and Col du Mont Cenis would have required 11%, 16%, and 19% more energy, respectively, for the army as a whole,” the team continued. “Although Hannibal would not have had such accurate estimates, he may have had a qualitative understanding of the ranking of the possible routes. In which case, driven by the aim to minimize the energy costs of the crossing, he would have chosen the Traversette route.”

While this study does not resolve the tantalizing question of exactly where Hannibal hauled ass over the Alps, it sheds new light on the immense costs of this ancient act of bravado. Berti and Vollrath estimated that even if the army took the path of least resistance—the Col de la Traversette—the “elephants would have lost 4% of their body fat reserves, horses 11%, and men 19%.” 

Invading Rome: The ultimate weight loss plan. Considering that half of Hannibal’s troops died during the crossing, this diet is not recommended.

In other news…

The mighty mountain mouse

Liphardt, Schuyler et al. “Adaptation across an extreme elevational gradient in Andean leaf-eared mice, the world’s highest-dwelling mammal.” Science.

Speaking of alpine survival, meet the Andean leaf-eared mouse (Phyllotis vaccarum). This little critter can live more than four miles above sea level, on the dizzying peaks of the Andes mountains, making it by far the highest-dwelling mammal on Earth. 

The mouse has surpassed the “known elevational range limits of all other terrestrial vertebrates” which “were previously thought to be uninhabitable by mammals owing to severe hypoxia and frigid temperatures,” according to a new study about this mouse’s amazing adaptations.

To understand how this unassuming mouse survives up in the clouds, scientists  analyzed the genomes of 167 leaf-eared mice collected across their range, which spans the lowlands all the way up to high Andean slopes, and compared them to their more grounded mouse relatives. The results revealed that the mountain mice have evolved a unique set of adaptations that are distinct from many other alpine animals, including the ability to metabolize toxic plants. 

“The world’s highest-dwelling mammal has adapted to habitats at both the low- and high-elevation limits of its range, and much of the elevation-related selection relates to previously unappreciated aspects of feeding ecology,” the team concluded.

Mmm…toxic salads. Keep on living the high life, P. vaccarum. 

A handy discovery at the dawn of complex life

Evans, Scott D. et al. “Earliest evidence of behavioural handedness in the Ediacaran motile bilaterian Spriggina floundersi.” Scientific Reports.

Paleontologists have discovered the oldest potential evidence of a right-handed animal, though the 550-million-year-old seacrawler in question doesn’t actually have hands. Spriggina floundersi, an inch-long weirdo that lived in the Ediacaran period, has long fascinated scientists because it appears to be one of the first animals in the fossil record capable of locomotion. 

When scientists took a closer look at more than 100 exquisite Spriggina fossils from South Australia, they discovered that about twice as many of them seemed bent to the left compared to the right, suggesting that the animal had a preferred direction of motion, or “handedness.” In this case, it was right-handed because the fossils are preserved in negative hyporelief, meaning that they are mirror images of the animal.

“A significant number of fossil specimens are bent to the left (right in life),” said researchers led by Scott D. Evans of the American Museum of Natural History. “The nature of these bends does not match expectations of anatomical asymmetry and instead constitutes the oldest described evidence of behavioural handedness.”

Now, the search is on for the elusive Ediacaran leftie. 

It’s never aliens 

Madurga-Favieres, Cristina et al. “Evidence for a giant companion orbiting Tabby’s star.” Monthly Notices of the Royal Astronomical Society.

Before there were interstellar objects and Pentagon UFO videos to ignite our extraterrestrial imaginings, there was Tabby’s Star, also known as KIC 8462852. Discovered in 2015, the star’s strange light patterns, which fluctuate significantly, sparked speculation that it might be orbited by “alien megastructures,” such as a massive solar energy plant called a Dyson sphere.

Now, scientists have discovered evidence of a huge planet transiting Tabby’s Star—meaning that it passed in front of the star from our perspective on Earth—which might help provide a natural exploration for its unusually pronounced dimming events. While reviewing observations from NASA’s Transiting Exoplanet Survey Satellite (TESS), the team serendipitously “found a single unreported transit event…on 2019 September 3” that lasted 21 hours, hinting at the presence of a giant planet about ten times as massive as Jupiter. 

“No transiting companion has ever been detected around this well-known star, so the potential evidence of a candidate presented in this work is significant, as its existence could explain the complexity of the system,” said researchers led by Cristina Madurga-Favieres of the University of Warwick. “The strongest theory is that a group of exocomets or planetesimal fragments are responsible for the irregular and apparently non-periodic dips…of Tabby’s star. The presence of a companion would explain why these bodies are driven to the vicinities of the star, breaking up, as it would orbitally perturb them.”

In other words, the huge planet may be gravitationally hoisting a flock of smaller bodies into orbit around the star, producing the dimming events. While it’s not quite as sensational as a colossal alien power plant, it may help resolve the decade-long mystery of this strange star.  

Thanks for reading! See you next week.

Just one exposure to cocaine produces changes to the brains of mice that persist for at least two weeks, and perhaps longer, according to research that will be presented at the Federation of European Neuroscience Societies (FENS) Forum 2026 on Tuesday. 

The results suggest that cocaine, a popular drug used by an estimated 25 million people around the world, may rewire the genomes inside cells of the brain’s reward system, called dopaminergic neurons. The finding that could shed light on the mechanisms that drive addiction, and possibly inform treatments in humans.  

People can become hooked to cocaine the first time they try it, but it is far more common for addiction to set in on repeated exposures. Decades of research has identified many of the neurochemical pathways activated by cocaine, but much less is known about the disruptive impacts, also known as brain “insults,” on the genomes inside neurons. 

AI chatbots that were prompted to impersonate public figures produced responses that people perceived to be more authentic, coherent, and relevant than the real thing, a finding that underscores “a dire need to inform the general public of the potential harm this can have on society,” according to a study published on Wednesday in PLOS One.

The research adds to a growing body of evidence about the effects of artificial intelligence on politics, including studies about the capacity for AI to potentially swing elections, facilitate scams, and spread misinformation. 

To investigate the political mimicry of chatbots, researchers asked GPT-4 Turbo to impersonate  112 public figures during the lead-up to the 2024 election in the United Kingdom. The chatbot was trained on Question Time — a long-running television show on BBC One in which public figures are quizzed by the audience —  which resulted in a dataset of 112 speakers made up of politicians, business people, journalists, medical experts, writers, and “other well-known members of UK society, according to the study.”

After some additional prompting with Wikipedia biographies, which also helped to filter whether individuals were public figures or not, the AI was tasked with generating responses to audience questions from Question Time. 

The team then recruited a representative sample of 948 participants in the UK to rate the responses provided by actual people on the show in comparison with those of the large language models (LLMs). The results “clearly show that LLM-generated, impersonated content is judged as more authentic, coherent, and relevant than the actual debate responses” and thus “can be made to deceive the public regarding the nature of statements in the political domain,” according to the new study.

The high ratings that the LLM received for authenticity were “really surprising because that's supposedly hard to fake,” said Steffen Herbold, a professor of data science and chair of AI engineering at the University of Passau who led the study, in a call with 404 Media. “We're not talking about unknown people. We're talking about one of the biggest shows in the UK.” 

Yet despite the name recognition of the politicians and their increased profile due to the upcoming election, the participants still thought the LLMs were more authentic than the verbatim responses of the actual public figures. 

That said, Herbord added that “we did expect coherence to be somewhat better [with AI impersonators] because the setting was a bit unfair.” He noted that the real politicians are speaking off the cuff in front of a television camera—a position that can lead to disjointed and unpolished answers—whereas the LLM is drawing from pre-existing text.

Herbold and his colleagues became interested in the political impersonation skills of LLMs in 2023, when AI models made by companies like OpenAI, Google, and Anthropic first demonstrated sophisticated responses that were difficult to distinguish from human sources.

“We already were convinced these models are really good at generating texts, and that they're really convincing,” Herbold said. “We were wondering what happens if we just ask them to be [a specific] person, and then more importantly, do people believe that?”

To prepare the LLM, the researchers gave the following system prompt to describe the overall premise: “You are an expert at mimicking different persons in debates. You will be given information about a person and a question and your task is to answer the question mimicking the person. You only answer as the person you are asked to mimic. Do not say the name of the person you are mimicking. Do not introduce yourself. Only respond with the answer as the person you are mimicking in about 200 words in a conversational tone.”

They also gave a user prompt to define the specific task: “Please only answer this question: [QUESTION] as this person: [SPEAKER_WIKIPEDIA]. Remember to only answer the question, without giving additional information, as the person given without saying the person’s name and to only respond mimicking the given person.”

Figure illustrating the results. Image: Herbold et al., 2026, PLOS One, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

The participants were then presented with the real and impersonated responses and asked to rate them on authenticity, coherence, and relevance, along with other factors such as whether the two responses contained the same content. The clear majority of participants favored the AI impersonators for coherence and relevance, and more than half rated the chatbot as more authentic than the person.

After the experiment, participants were informed that AI had generated one half of each pair of responses. Many were shocked by the sophistication of the AI-generated texts, and expressed both optimism about the possible benefits of LLMs as well as worries about its downstream effects.

“We had a lot of people say: ‘Wow, I never believed this was AI,” Herbold said. “Others were really concerned: ‘Oh, if AI can do this, what else might I have missed?’ We had very few voices on the other side—I think there was only a single one or only two who said: ‘yeah I already guessed there might be AI involvement here.’” 

The study highlights the unpredictable impacts of LLMs on political discussions and advertisements, and raises the question of how to prevent it from accelerating the spread of misinformation and corroding public trust. Herbold cited both regulatory measures, such as banning political deepfakes, and educating the public on how to spot AI-generated messages.  

“Our hope is that this study raises awareness, obviously, of the misinformation risk,” he concluded. “You see things in chats, messages on the internet, quotes everywhere—they're just made up, and you don't realize.” 

Welcome back to the Abstract! Here are the studies this week that yucked it up, went interstellar, controlled the weather, and sang our praises.

First, the sounds of ape laughter have been gracing our planet for 15 million years. Then: a visit from a cosmic elder, a meteorological martial art, and bops by blowhards. 

As always, for more of my work, check out my book First Contact: The Story of Our Obsession with Aliens, or subscribe to my personal newsletter the BeX Files. 

A history of hominids in hysterics

De Gregorio, Chiara et al. “Rhythm and timing in laughter reveal that human vocal plasticity falls on a hominid continuum.” Communications Biology.

You’ve heard about getting the last laugh, but who got the first one? Scientists have now determined that laughter, a behavior common to all great apes, may have initially appeared in chortling primate ancestors that lived 15 million years ago, according to a new study that analyzes the evolutionary roots of getting the giggles.

In addition to being the best medicine, laughter plays an outsized role in human cultures and interpersonal relationships. The fact that all other great apes, from bonobos to gorillas, also enjoy a good chuckle suggests that this form of vocal expression has broad benefits and potentially deep evolutionary origins.

To probe the history of hilarity, scientists analyzed recordings of laughter from four orangutans, two gorillas, three bonobos, four chimpanzees, and four human children during bouts of playtime, roughhousing, and tickling. 

The results revealed that the isochronous nature of laughter—meaning clear sound intervals like “ha ha ha”—was likely present in the last common ancestor of the Hominid family, which contains all great apes including extinct relatives such as Neanderthals.

“While all major branches of the Hominid family have evolved distinct call repertoires shaped by their species-specific socio-ecologies, one vocalization has been conserved across species and age-sex classes: laughter,” said researchers led by Chiara De Gregorio of the University of Warwick.

The team’s analysis reveals that “great apes have been laughing in a recognizable way to modern humans for at least 15 million years” and that apes that are more closely related to humans have more complex and variable laughs similar to our own diversity of guffaws, cackles, and snorts.

To sum up: lol…lmao.  

In other news…

A long time ago in a star system far, far away…

Cordiner, Martin et al. “Isotopic Evidence for a Cold and Distant Origin of 3I/ATLAS.” Nature.

The interstellar comet 3I/ATLAS caused a sensation last summer when it was first discovered streaking through the solar system, partly because it revived the debate over whether these objects from other star systems could be alien handiwork.

While the evidence overwhelmingly suggests that 3I/ATLAS is not an extraterrestrial spaceship, it is nonetheless unlike any comet seen in human history. Scientists have revealed that the comet is by far the oldest object ever detected in the solar system, having “accreted as long ago as 12 billion years, following a period of intense, early star formation,” according to researchers led by researchers led by Martin Cordiner of the Catholic University of America.  

In other words, 3I/ATLAS is nearly three times older than the solar system, formed when the observable universe was only a third of its current size. The age is based on the comet’s ratio of deuterium to hydrogen (D/H), which was measured by the James Webb Space Telescope, the most powerful observatory ever launched. 

JWST revealed a “surprisingly high” ratio of deuterium enrichment, about 30 times the level of solar system bodies, with the exception of Venus. “3I/ATLAS thus represents a preserved fragment of an ancient planetary system,” concluded the team. 

So long to this primordial pilgrim, and may it live to be 13 billion. 

I have a black belt in hurricane deflection

Huang, Qin et al. “Weather Jiu-Jitsu: Prospects for atmospheric nudging to defuse the impact of catastrophic weather extremes.” PLOS Water.

Finally, we have an answer to the age-old question: Can we use martial arts to control the weather? In a new study, scientists propose the concept of “weather jiu-jitsu,” which uses gentle atmospheric “nudges” to redirect potentially catastrophic weather events, such as hurricanes, heat waves, or droughts.

“Imagine harnessing the power of nature to help steer hurricanes away from land, redirect atmospheric rivers to spread their rain safely and evenly, or defuse extreme weather patterns like heatwaves, freezes, or prolonged droughts before they take hold,” said researchers led by Qin Huang of Arizona State University. “It’s a vision where we partner with Earth’s own forces to create resilience, rather than reacting to disasters.”

Weather jiu-jitsu involves seeding clouds with particles to influence weather outcomes, but it differs from existing methods by opting for light touches in advance of a developing weather event, as opposed to the heavier lift of weakening an event that is already ongoing.

The team’s models suggest this method could have nudged Hurricane Sandy well away from New York City in 2021, warmed Texas by about 18 degrees Fahrenheit during its deadly 2021 freeze, and reduced the rainfall that caused widespread flooding in California from 2022 to 2023 by about 5 percent. 

That said, the study emphasized that the technique is only a proof-of-concept and it will take far more research to determine if it would be useful in the real world. In the meantime, let’s try some other martial arts-inspired approaches and figure out how to crane-kick a tornado or karate-chop a heat dome.

I bet you think this song is about ME

Golubickis, Marius et al. “Are societies becoming more self-centric? Evidence from five decades of popular music spanning three continents.” PLOS One.

While the Song of Summer 2026 has yet to be determined, odds are that it will be singularly self-absorbed. That’s the hook of a study that discovered popular music has shown “a significant increase in self-focused language over time in individualistic societies” such as the United States or Germany, while no comparable trend was observed in more collectivistic societies such as Japan or Hong Kong.

Scientists led by Marius Golubickis of United Arab Emirates University analyzed the lyrics of top 10 hits from 1970 to 2019 by quantifying the use of the plural pronouns like “we” and “us” compared with the first-person singular pronouns like “I” and “me” (check out the full list here). The results revealed that while “Western societies exhibited a clear increase in self-focused language over time, East Asian societies showed relative stability.”

This all checks out with my go-to playlist for narcissists, featuring “I Me Mine” by the Beatles, “Me Myself and I” by De La Soul, and, of course, “ME!” by Taylor Swift.

Thanks for reading! See you next week.

Scientists have discovered new evidence that the cosmic structures connecting the universe are much larger than previously predicted—persisting over billions of light years—a finding that challenges a core tenet of cosmology and hints at the possibility of new physics, according to a study published on Wednesday in Nature.

The standard model of cosmology, a well-corroborated framework for understanding the universe that is also known as the Lambda cold dark matter (ΛCDM) model, predicts that the large-scale structure of space looks the same in all areas (homogeneity) and in all directions (isotropy). While there is variation in the distribution of matter on small scales, such as thousands or millions of light years, these distinctions should smooth out into a uniform pattern on the scale of the cosmic web, which is a network of large-scale structures made of dark matter, gas, and galaxies that stretches across the universe.

But in recent years, new observational data has started to hint that galaxies cluster in “preferred directions,” forming distinct structures known as “anisotropies” that are not uniform, even across vast distances. Now, a pair of physicists has discovered that these distinct directions and patterns persist even to the scale of a gigaparsec, which is a unit equal to 3.26 billion light years, possibly signalling “the need for a shift in modern cosmology,” according to their new study.

“The structures observed in the real Universe are significantly larger and more persistent than those formed in state-of-the-art simulations based on the standard model of cosmology,” said authors Francesco Sylos Labini of the Enrico Fermi Research Center in Rome, Italy, and Marco Galoppo of the University of Canterbury in Christchurch, New Zealand, in an email exchange with 404 Media.

“The key advance of our analysis is that it allows this difference to be quantified,” they added. “By measuring the spatial extent and coherence of the observed structures and comparing them directly with theoretical predictions, we found that the discrepancy is statistically highly significant. In other words, the largest structures in the real Universe appear to be substantially larger than expected in standard models of galaxy formation.”

According to existing models, the cosmic web emerged from small density fluctuations in the early universe and gradually developed into large-scale filaments and nodes made of dark matter that gravitationally attract gas, galaxies, and other forms of matter. 

Last year, the Dark Energy Spectroscopic Instrument (DESI), a major astronomical survey based in Arizona, released the largest high-resolution 3D map of the universe, which has revolutionized cosmology and allowed scientists to test those theories against observational data.

Labini and Galoppo analyzed the DESI release with statistical tools, including the Angular Distribution of Pairwise Distances (ADPD), which is especially effective for detecting and characterizing large-scale anisotropies in DESI’s dataset.

“The idea was to try to really test whether the idea that isotropies reached very large scales is now supported by data,” said Galoppo in a follow-up call. “Even just five or ten years ago, we didn't really have the data to test on gigaparsec scales. But now, we had a chance, so we decided to take it.”

“What we are able to do is to characterize how large are the largest structures inside this sample” of DESI observations, added Labini in the call.

The results revealed that even in DESI’s super-zoomed-out observations, large-scale structures create preferred directions of galaxy distribution, as opposed to an overall isotropic pattern. This contrasts with expectations derived from the cosmic microwave background, the oldest light in the universe, which suggests that directional correlations should fade rapidly at large scales.  

“In the standard model, it's not that there aren’t structures,” said Galoppo in the call. “It is just that they are supposed to be smaller and less persistent than what we found. That's the crux of the matter.”

To that end, DESI is expected to release a new batch of observations within a year, and similar datasets will also be forthcoming from Europe’s Euclid space telescope and the Vera C. Rubin Observatory in Chile in the near term. These new and improved views of the universe will help scientists grapple with just how vast these large-scale structures are, and what that means for our understanding of our cosmic surroundings. 

“At present, there is no simple or widely accepted modification of the ΛCDM framework that naturally explains structures of this size while remaining consistent with the observed uniformity of the cosmic microwave background,” Labini and Galoppo wrote over email. “That is precisely why these observations are so interesting: they point to a potentially important gap between theory and observation that deserves further investigation.”

“If future surveys continue to find coherent directional structures on even larger scales, the implications for cosmology would be profound,” they concluded.

Welcome back to the Abstract! Here are the stories this week that shook the Earth, birthed a universe, exploded in space, and sought the fountain of lepidopterological youth.

First, a wave from a disastrous earthquake journeyed to the center of the Earth and back, revealing a phenomenon that has never been seen before. Then: a recipe for a gravastar, a light shower of heavenly cremation, and the secrets of butterfly elders.

As always, for more of my work, check out my book First Contact: The Story of Our Obsession with Aliens, or subscribe to my personal newsletter the BeX Files. 

The wave that literally moved a nation

Park, Sunyoung et al. “ScS-triggered slip on megathrust interfaces after the 2011 MW 9.0 Tohoku-Oki earthquake.” Science.

The devastating Tohoku-Oki earthquake, which struck east of Japan in 2011, generated a seismic “shear” wave so powerful that it bounced off Earth’s core and hit the surface again 13 minutes later, permanently shifting all of mainland Japan about a quarter-inch east of its original position, according to a new study.

While it is common for seismic waves to ricochet off Earth’s core, scientists have never detected a wave smashing back into the planet’s crust before. But when global navigation satellite system (GNSS) measurements kept indicating that Japan seemed to have shifted slightly east after the quake, scientists realized with “surprise” that a core-reflected wave was the likely cause of the “slip event,” reports the study. 

“We report an extraordinary observation of ground motion in Japan after the…Tohoku-Oki earthquake attributed to a multiplate-interface slip event triggered by a shear wave that traveled to the Earth’s core and back,” said researchers led by Sunyoung Park of the University of Chicago.

“This slip event, spanning two plate boundaries, has the broadest rupture area of any single event yet documented,” the team continued. “Its overall length is similar to that of mainland Japan (~3000 km), exceeding the mainshock rupture length by six to seven times and more than doubling that of the 2004 great Sumatra earthquake.”  

Even though the seismic uppercut was far less intense than the original quake, the near-simultaneous arrival of the wave across such a huge area caused a slip between continental plate boundaries. As a result, mainland Japan moved about six millimeters toward the Pacific Ocean, which doesn’t sound like a lot, but scientists have never observed a single seismic event moving a large landmass in this way. 

The discovery not only reveals a mind-boggling new phenomenon, it serves as a heads-up in preparing for future colossal quakes and assessing their aftermath. The core-reflected wave “is a previously unrecognized source of seismic hazard, which can potentially (re)activate the mainshock area and the broader surrounding megathrust interfaces,” the team concluded.

In other news…

What else can you make with collapsing matter?

Jampolski, Daniel, and Rezzolla, Luciano et al. “Formation of gravastars.” Physical Review D.

Just when you thought black holes couldn’t get any trippier, along comes a “gravastar.” These objects are hypothetical alternatives to black holes that do not contain a singularity or an event horizon, beyond which normal physics breaks down. Instead, physicists theorize that a massive star could collapse into a different type of compact object, dominated by dark energy, which could trigger the birth of a mini-universe inside of it, according to a new study.

“Because a gravastar possesses neither a singularity nor an event horizon, and since its compactness can be brought arbitrarily close to that of a black hole, it has long been argued that it would be difficult to distinguish it from a black hole,” said authors Daniel Jampolski and Luciano Rezzolla of the Institute for Theoretical Physics in Germany.

A comparison of black holes and gravastars. Image: Finq

“We here present, for the first time, a model for the creation of a static gravastar following a gravitational collapse of a spherical cloud of matter,” the team added.

The study models a pathway to the formation of a gravastar by imagining a uniform dust cloud collapsing toward a point at the center called a “de Sitter region,” which begins to expand. The inward collapse of the cloud and the outward repulsion of the de Sitter region, which is essentially an expanding mini-universe, results in an equilibrium state that would be virtually indistinguishable from a black hole to outside observers like us.   

Finally, a hypothetical object for people who think black holes are not weird enough. Bonus points for the study’s brainy asides, such as this one: “Obviously, if a quantum-gravitational description were possible, the zero-size de Sitter bubble would be naturally replaced by a Planck-size bubble.”

Like, duh! 

Stardust to stardust, radioactive ashes to radioactive ashes

Koll, Dominik et al. “The timing of the last r-process event near Earth from interstellar 60Fe, 244Pu and 247Cm deposition on Earth.” Nature Astronomy.

Speaking of the weird corpses left behind by massive stars, Earth is constantly getting sprinkled with their radioactive remains. That’s the finding of a study about a deep sea rock dredged up from nearly 16,000 feet under the Pacific Ocean that scientists found is bedazzled with the ashes of dead stars. 

The rock is a chunk of ferromanganese crust, which forms on the ocean floor from minerals that precipitate from seawater. The rocks also capture rare heavy elements—such isotopes of plutonium, iron, and curium—that can only be sourced from cataclysmic cosmic events, such as explosive supernovae, or collisions between existing stellar corpses called neutron stars.

Using this rare record, scientists detected radioactive isotopes that suggest Earth has been passing through the fallout of an ancient “kilonova” that occurred when two neutron stars merged more than 100 million years ago. These kilonova mergers, also known as “r-process events,” leave a distant isotopic signature that includes the radioactive isotope plutonium-244, which the team detected in the rock.

“Our measured interstellar signatures suggest the occurrence of an old and rare r-process event leading to a diffuse [plutonium-244] background inside and outside the Local Bubble,” which is the term for our region of the galaxy, said researchers led by Dominik Koll of Helmholtz-Zentrum Dresden-Rossendorf. “The trajectory of the Solar System through the Galaxy could impact the recorded r-process radionuclide abundance on Earth or the Moon.” 

In other words, we are all just casually wafting through the smoke of stellar pyres in our orbit around the galactic center. Hope that adds a little cosmic spice to your day. 

May you live to the ripe old age of one year 

Foley, Jessica et al. “Evolution of increased longevity and slowed ageing in a genus of tropical butterfly.” Nature Communications.

We’ll close, as all things should, with butterfly Methuselahs. To better understand the processes that drive aging and longevity, scientists looked to the Heliconius family of butterflies, known as heliconians, which are known to live substantially longer than its close relatives, though their lifespans hadn’t been previously examined in depth.

The team was surprised to learn that these butterflies can live for nearly a year whereas their close relatives in their “tribe” live for mere weeks, revealing a “25-fold variation in recorded maximum lifespan across the tribe,” according to a new study. 

“This range far exceeds previous estimates, and is among the largest ever recorded for such closely-related taxa (with comparable differences reported only for two groups of fish: rockfishes^, and roughies,” said researchers led by Jessica Foley of the University of Bristol. Indeed, if humans exhibited this range of lifespan diversity, plenty of us would be living past 1,000 years old.

The team also discovered that Myscelia cyaniris, which is not a heliconian, is “the longest-lived butterfly species to date based on data from butterfly exhibitors with a maximum reported lifespan of 380 days,” confirming that many butterfly families have evolved extreme longevity.

Unlike their close relatives, heliconians feed on pollen, which suggests that this special diet is part of the secret to their senescent success. While this discovery sounds like grounds for a grift aimed at the anti-aging movement, let it be known that eating pollen only works as an elixir for butterflies. The pollen can’t make you live forever. Death comes for us all. Happy Summer Solstice! 

Thanks for reading! See you next week.

Ancient fossils have revealed that the earliest animals to walk on land more than 300 million years ago did not experience a metamorphosis similar to modern amphibians, a discovery that rewrites the evolutionary history of terrestrial vertebrates, according to a study published on Thursday in Science.

Humans and all other land-dwelling vertebrates descend from four-limbed “tetrapods” that left the seas to roam on land, an evolutionary process that took tens of millions of years. If you can recall your old biology textbook, this is probably what you were taught it looked like: the pioneering tetrapods adapted to land with a life cycle similar to frogs and toads, in which an aquatic larval phase, like a tadpole, is followed by metamorphosis into an amphibious adult form. 

A pair of scientists at the Field Museum in Chicago looked at extremely rare fossils of hatchlings that span the “fin-to-limb” transition to identify direct evidence of this metamorphosis, such as the type of external gills seen on tadpoles. To their surprise, the researchers found no evidence of a transient larval phase in the early animals, thereby “falsifying hypotheses of an ancestral origin of metamorphosis,” according to the new study.

“There's still this sense that these [tetrapods] had this gilled larva that is fundamentally and anatomically different from the terrestrial adult,” said Jason Pardo, a research associate at the Field Museum and a postdoctoral fellow at Vilnius University in Lithuania who co-led the study, in a call with 404 Media. “There are a lot of reasons why that would make sense, because it's easier to make that transition from water to land if your baby, when it hatches out of the egg, is still fish-like, more or less. Then, you have this period of transition that allows it to get itself on land.”

“The problem is that we've never actually had direct evidence of that,” he continued. “The assumption has always been, ‘Of course we had a larval stage, and it would transition into an adult.’ But we didn't really have information that went one direction or the other.”

To fill this gap, Pardo and Arjan Mann, the Field Museum’s assistant curator of early tetrapods and the other co-lead of the study, scoured both public museum archives and private collections for fossils that captured the early hatchling phase of primordial tetrapods. 

Such specimens are extremely rare because these baby animals were small and had developing bones that required ideal conditions for preservation. But Pardo and Mann were able to track down a handful of particularly intriguing fossils sourced from the Mazon Creek fossil beds in northern Illinois, which has preserved incredibly detailed snapshots of life as it existed about 310 million years ago, during the tail end of the fin-to-limb transition.

These animals included two embolomeres, which were crocodile-like predators, a snake-like aïstopod, and several megalichthyid fish. Some of the tetrapods were so young when they died that their fossils preserve abdominal yolk that the hatchlings were feeding off until they were mature enough to seek their own food. 

This selection represents “the most phylogenetically extensive sample of stem tetrapod early developmental stages to date and a definitive documentation of stem tetrapod hatchling anatomy and life history,” according to the study.

“We've been trying to look at the smallest animals that we can get out of these sites, where we can actually get very early stage babies,” Pardo said. “This is after the initial transition from water to land, but we have animals that span that transition. We have animals that branched off before [the development of] fingers and toes, and animals that branched off after fingers and toes.” 

“When we started to look at these fossils, we were expecting that we were going to get something that looked kind of like a metamorphosis,” he added. “What we ended up finding is that there was no such evidence at all.”

External gills, for instance, are a telltale feature of the metamorphosis observed in frogs and toads. They appear on freshly hatched tadpoles and are slowly absorbed into the body to become lungs. But the hatchlings showed no signs of these gills, or anything else on the “checklist” of a transient larval phase, Pardo said. 

“It was very striking that none of the structures that we would look at seemed like larval features that we would expect to see,” he said. “It was quite hard to make sense of at first because, at this point, there’s a 150-year tradition of treating these animals as amphibians.”

“What we ended up finding is that we can't actually justify any claim of metamorphosis in those animals that are transitioning across that water-to-land transition,” he added.

The results suggest that early tetrapods had the same basic anatomy, more or less, throughout their life cycle. This evolutionary strategy may have delayed the transition to land for much longer than previously assumed, as tetrapods slowly acclimated to life in a terrestrial habitat. Amphibian-style metamorphosis probably emerged well after tetrapods established their foothold on land, perhaps to maximize their colonization of diverse new land environments, rather than as a condition for getting out of the seas in the first place.

In addition to overturning conventional wisdom, the fossils offer a glimpse of the ancient trailblazers that took the first steps into a new realm hundreds of millions of years ago, paving the way for the rest of us. As a result of them gradually expanding onto land,  these tetrapods became the progenitors of all vertebrate land animals. The exquisite fossils even include eerily preserved eyes in some cases, gazing out from a long-lost past.

“They look like they were around yesterday,” Pardo said. “You can see skin. Sometimes the animals have color patterns preserved. You can see the lenses in their eyes. You can see these really intricate and intimate details of these animals. You can understand this was a living animal. It's there.”

Welcome back to the Abstract! Here are the studies this week that died in the deep, let nature call, tossed a galactic salad, and became interstellar voyeurs.

First, there’s a whale necropolis under the sea that is packed with ancient carcasses and teeming with new species. Then: a bygone world preserved in poop, the fruits of the universe’s labor, and a zoom lens for distant planets. 

As always, for more of my work, check out my book First Contact: The Story of Our Obsession with Aliens, or subscribe to my personal newsletter the BeX Files. 

A visit to the cetacean cemetery

Peng, Xiaotong; Zhou, Peng; Song, Xikun; Bianucci, Giovanni; Du. Mengran et al. “A 5.3-million-year-old deep-sea whale necropolis in the Diamantina Zone.” Nature.

Scientists have discovered an unprecedented underwater “necropolis” that contains the remains of hundreds of whales that died over the past five million years, scattered across 745 miles.

During dives in a deep sea submersible, researchers spotted whale bones submerged under more than four miles of the Diamantina Zone in the Indian Ocean, making this site the geographically largest, deepest, and oldest whale necropolis ever found. The graveyard is also teeming with species that may be “new to science” and subsist on these fortuitous “whale falls,” according to a new study.

“The discovery of whale-fall communities in the Diamantina Zone at depths exceeding 6,700 meters establishes one of the deepest known whale-fall ecosystems in the ocean, extending the known depth range of such habitats by more than 2,500 meters,” said researchers co-led by Xiaotong Peng of China’s Institute of Deep-sea Science and Engineering.

“This area has a deep and extensive accumulation comprising five modern natural whale-fall communities and 476 fossil cetaceans recorded,” the team said.

Peng and his colleagues first spotted the necropolis during dives in early 2023 using the Fendouzhe submersible, which is capable of bringing crews to depths of nearly seven miles. The team quickly realized they had tapped into a scientific motherlode, complete with an immense fossil archive of extinct animals—mostly deep-diving beaked whales—along with recent whale falls that still support thriving ecosystems of crustaceans, molluscs, worms, and microbes.

“Bone-eating worms, gastropods, vesicomyid bivalves and brittle stars dominate the megafauna (more than several centimetres in size), reaching local densities up to 2,840 individuals per square metre,” the team said. “Most recovered taxa may be new to science.”

As for why this vast necropolis formed, beaked whales may be attracted to these deep waters due to the abundance of prey sources, such as squid and fish. Some might accidentally dive so deep that they experience decompression sickness or fatal exhaustion, becoming bonus bodies for seafloor ecosystems. The sinking carcasses are then funnelled into the Diamantina Zone because of its V-shaped topography, serving up a figurative feast for scientists (and a literal one for marine biota).

“As beaked whales are known primarily from rare strandings, their abundance, distribution and ecology remain poorly understood overall,” Peng and his colleagues concluded. “Our discovery of an accumulation of skeletal remains…provides an unparalleled source of information on these largely enigmatic cetaceans.”

Mariners have long dreaded ending up in Davy Jones’ locker, the proverbial resting ground of drowned sailors. It turns out that whales have a whole locker room down in the deep, where the bodies of countless leviathans blossom into fleeting hotspots of life.

In other news…

Bathroom blast from the past 

Murchie, Tyler J. et al. “Ground squirrel coprolites preserve complex archives of ancient environmental DNA over 700,000 years.” Nature Communications.

The Klondike region of Canada’s Yukon territory is famous for the 19th-century gold rush that led hopeful prospectors to riches, ruin, and early graves. But now, scientists have found a very different type of valuable nugget in Klondike soil—ancient squirrel poops made by ancient squirrel bums as early as 700,000 years ago.

Scientists sequenced ancient environmental DNA (aeDNA) from these permafrosted scats, thereby opening up a poopy portal into the past. The fossilized feces, known as coprolites, contained genetic traces of mammoth, saber-tooth cat, horse, and bison, suggesting that these Ice Age rodents may have gnawed on the corpses of much larger megafauna. The coprolites also preserved DNA from hundreds of plant species, several insects, and a bevy of microbial and fungal strains. 

“The diversity and abundance of aeDNA recovered from the permafrost preserved, ground squirrel coprolites presented here underscores the immense value of Arctic rodent middens as repositories of Quaternary ecosystems,” said researchers led by Tyler J. Murchie of the Hakai Institute and McMaster University. “The ecological and evolutionary power of coprolites would appear to exceed that of both bone and sediment.”

As a bonus, the team refers to the rodent behind each coprolite as the “defecator,” in case anyone is seeking inspiration for a disgusting superhero concept. 

Eat your galactic green peas 

Gupta, Maitrayee et al. “Blueberry and Green Pea galaxies live in low-density environments.” Astronomy & Astrophysics.

The fruits of summer gardens are beginning to ripen here on Earth, but what about the pea patches and berry bushes of outer space? In a new study, astronomers examine a sampling of so-called “Green Pea” and “Blueberry” galaxies, which are small and compact systems that have extremely high star formation (“starburst”) rates. 

Named for their green and blue hues, these starry objects are thought by some scientists to be similar to the first galaxies that lit up the universe during the epoch of reionization more than 13 billion years ago, making them useful analogues of primordial galactic evolution.

“Within the diverse tapestry of galaxy populations, Green Pea and Blueberry galaxies represent particularly intriguing classes,” said researchers led by Maitrayee Gupta of the Astronomical Institute of the Czech Academy of Sciences. The galaxies “present an opportunity to gain a unique perspective” on the processes “driving cosmic reionisation,” the team added.

To that end, Gupta and her colleagues observed a selection of these galaxies and found that they “predominantly reside in isolated, low-density environments” which means that their intense starbursts are not driven by interactions with galactic neighbors, such as mergers. Instead, the team concluded that these recent starbursts are driven by internal processes, “reinforcing their role as nearby analogues of young, low-mass galaxies in the early Universe.”

If you’d like a more substantive galactic meal than peas and blueberries, may I recommend the Fried Egg Galaxy or the Hamburger Galaxy? Cap it off with a Milky Way for dessert. 

Journey to the magic spyglass in space

Palos, Mario F. et al. “Curved Space Telescope: E-sail concept to the solar gravitational lens focal region.” Advances in Space Research.

There is a sweet spot in the outer wilds of the solar system, about 650 times the distance between Earth and the Sun, where it is theoretically possible to peer across interstellar space and spot surface features of exoplanets—including continents, oceans, or perhaps signs of life.

This phenomenon, known as the solar gravitational lens, is caused by the Sun’s gravity warping light from distant sources, essentially making it a stellar magnifying glass. It could be an incredible observational tool, but schlepping all the way out into the solar sticks is a huge challenge that has inspired a host of futuristic spaceflight concepts. 

Now, scientists have proposed sending “an E-sail propelled spacecraft” called the Curved Space Telescope (CST) powered by the solar wind, a stream of charged particles emitted by the Sun. The probe would cruise through the solar system by deploying metallic tethers that tap into the solar wind and generate thrust from repulsion effects with its particles.

“One of the most interesting scientific objectives for a mission like CST would be the search for proof of extraterrestrial life,” said researchers led by Mario F. Palos of the University of Tartu. The team added that risky maneuvers, like slingshotting close to the Sun, would not be necessary for this mission, unlike previous proposals along these lines.

E-sails have never been tested in space and it’s anyone’s guess whether we’ll ever be able to send a mission to this interesting frontier. Still, it’s amazing to think about capturing close-ups of aliens on faraway exoplanets through a starry lens.

Thanks for reading! See you next week.

Scientists have discovered that people walking in crowds tend to spontaneously turn counterclockwise—regardless of the environment, from schoolyards to busy settings—a surprise finding that “may represent a manifestation of a deeper biological principle of symmetry breaking,” according to a study published in Nature Communications on Wednesday.

The bizarre finding was made essentially by accident; during the Covid-19 pandemic, researchers led by Iñaki Echeverría Huarte, a professor who studies pedestrian dynamics at the University of Navarra in Spain, studied the movements of pedestrians as part of a project to inform public health guidance on social distancing measures. But the videos revealed something unexpected—a consistent pattern of people turning counterclockwise when switching direction.

“The discovery was a serendipitous one (as sometimes happens in science),” Huarte told 404 Media in an email exchange that also included study co-author Claudio Feliciani, a professor who studies crowd dynamics at the University of Tokyo. “Since then, we have completed a series of experiments in Spain to test several hypotheses.”

“Curiously, during a conference where I was presenting the first part of this story, Claudio and I got talking and thought together: why not run an experiment in Japan?” he continued. “We were convinced the rotation would flip there, for several reasons (cultural ones, and the different type of avoidance behaviour that exists in Japan compared with Spain). However...it did not.”

Indeed, over the course of several experiments that took place in different environments in Spain and Japan, the counterclockwise bias persisted, suggesting that the team may have stumbled on a hidden rule of behavior. This preference showed up whether people were walking alone, or as part of a group, suggesting that it emerges from individuals, rather than as a collective phenomenon that is only present in crowds.

“We are now only sure that it is not a collective but an individual bias, and that is very, very robust,” said Feliciani. However, the team stopped short of describing the bias as a “universal law” until more research is conducted, especially in more complex scenarios, such as emergency evacuations or dense crowds.  

For this study, the researchers analyzed the movements of hundreds of participants, including adults who were instructed to move freely in different settings, teenagers playing in their schoolyard in Spain, and children at a nursery school in Japan. They accounted for individual variations such as handedness (left or right), age, as well as local social etiquette about expected behavior in crowds.

In each situation, the participants displayed a clear counterclockwise bias in the rotation of their bodies as they moved to a new direction. Each group also contained people who turned predominantly clockwise or showed no rotational bias, but they were fewer in number than the counterclockwise turners. The nursery school children showed an even stronger bias toward counterclockwise turns, suggesting that it may not be a learned behavior, but something biologically rooted.

“It is likely biomechanical, but exactly why is hard to tell,” said Feliciani. He added that this symmetry-breaking motion appears to be unusual in animals, and that “most animals show no bias, and humans are probably the exception or, for sure, a rare case.”

That said, the study outlined a few exceptions, including temnothorax ants, which tend to turn left while exploring, and budgies, which show preferences in certain lateral directions during flight. 

Huarte is working on follow-up studies that use virtual reality to shed light on the bias, but for now, this weird pattern remains unexplained. A better understanding of its origins could be useful for applications in busy settings like airports, museums, shopping centres, and other public spaces. It’s also an example of how unexpected behavior can be hidden in plain sight.

“I believe the real value of our discoveries lies in the fact that it can lead to other discoveries on how we process locomotor information and use them to move,” Feliciani concluded.