When a team of physicists in Paris fabricated the world’s first temporal photonic crystal, they added a new dimension to humanity’s quest to control light: time. From lighting our homes to advanced fiber optics and lasers, humans have long worked to control light, and now researchers say that can be achieved in a fourth dimension.
Yannis Laplace led the team at the Laboratory of Irradiated Solids (LSI) in demonstrating the temporal photonic crystal, with the help of other European institutions, which was revealed in a recent paper published in Nature.
As light hits the crystal, a terahertz electromagnetic wave rapidly modulates its optical properties, producing a device that controls light over time without expending energy.
Crystal Power
Controlling the properties of light for applications in telecommunications, sensors, and light sources is an active research field and is often reliant on crystals. In technical terms, a crystal is simply a regularly and periodically organized system. While we primarily think of translucent, shining crystals, they can be constructed of other forms of matter, such as gas or liquids, so long as their atoms arrange into regular, well-defined intervals.
How atoms arrange to form crystals grants their electrons and the photons they emit unique properties, including color and energy. Targeting photons specifically became an interest of scientists in the 1980s, with the development of photonic crystals, whose alternating materials each had unique effects on photons. These photonics gave rise to modern lasers, optical fibers, and photodetectors, technologies that have advanced considerably in recent decades.
Into the Time Dimension
In the last decade, researchers have experimented with a new kind of crystal: the time crystal. They are comprised of a unique form of matter in which particles repeat a continuous sequence—not just in the three physical dimensions, but also in time, without expending any energy.
The LSI team sought to combine photonic crystals with time crystals to develop a temporal photonic crystal that would control a light-matter interaction by alternating over time. Their work represents the first time such an idea has moved from the theoretical realm into the physical.
The device the researchers constructed operates in the high terahertz range, pushing light to oscillate 1000 billion times a second. It consists of micrometer-scale gold structures, shaped like battlements, leaving open cavities separated from an indium-antimony semiconductor by an insulating layer. The cavities between the gold structures trap light photons.
Testing a Temporal Photonic Crystal
To demonstrate their device in the real world, the LSI team bombarded it with terahertz laser pulses and recorded the material’s optical properties, modulating light over time. The effect was incredibly powerful, creating a strong modulation that alternated one billionth of a billionth of a second.
At the semiconductor layer, the researchers observed electrons forming from the light waves in what are called “surface plasmons,” oscillating with their effective mass. The greater their speed, the heavier these electrons become, producing the device’s optical modulations.
Beyond this observed phenomenon, the researchers suspect other interesting conditions may be occurring within the crystal. Some indirect evidence suggests that photons trapped inside the structure are amplified, although presently no direct observations have confirmed this. The team is continuing with experiments in hopes of eventually capturing this photon trapping phenomenon.
Laplace and his colleagues see these unique time crystals as eventually being a pathway toward the creation of terahertz-scale light sources and detectors, which would fit between those of electronics and visible light frequencies.
Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org.
Not all meteorites are created equal, and one that crashed through the roof of a New Jersey home is giving scientists a rare glimpse into the chemistry of an ancient asteroid while offering new clues to the puzzle of how life began on Earth.
On July 16, 2024, a daytime meteor streaked across the sky and produced a sonic boom as it passed south of the Statue of Liberty.
“A forensic study of the fragments revealed that they contained preserved bits from near the surface of a primitive asteroid where it experienced concentrated salty fluids—a process not previously known from this type of proto-planet world,” said lead author and meteor astronomer Peter Jenniskens of the SETI Institute and NASA’s Ames Research Center in California’s Silicon Valley in a statement.
Two years later, after analyzing fragments from the event, researchers found that the meteorite contained evidence of ancient salty fluids, complex organic chemistry, and processes that occurred on a primitive asteroid billions of years ago.
Daytime meteor (left), impact site, and a fragment of the Hillsborough meteorite (Image Credit: (A) M. Kirschner and M. Hankey, American Meteor Society; [(B) to (D)] A. Gordon/SETI Institute).The findings, published in the journal Science Advances, come from an international team led by meteor astronomer Peter Jenniskens of the SETI Institute and NASA Ames Research Center.
“Our cameras in Northford, Connecticut, and Douglassville, Pennsylvania, as well as a doorbell camera in Wayne, New Jersey, captured the meteor, and from that we measured its trajectory,” said American Meteor Society operations manager Mike Hankey.
Traveling at approximately 32,000 miles per hour (14.4 kilometers per second), witnesses from the surrounding areas, including New York, New Jersey, Connecticut, Rhode Island, and Pennsylvania, reported seeing a bright fireball that broke apart while a part of it broke through the roof of a New Jersey residence.
“The path traced back to low in the asteroid belt,” Hankey adds.
Using footage from meteor cameras, including systems in Connecticut and Pennsylvania, researchers reconstructed the meteor’s path. The trajectory traced back to a region of the asteroid belt between Mars and Jupiter. The space rock disappeared from view about 22 miles above the surface. Shortly afterward, weather radar at Newark Airport detected a cloud of falling debris stretching from Staten Island into New Jersey.
The homeowner acted quickly, handling the space rock with gloves and aluminum foil before placing it in a glass container to protect the material from contamination.
The meteorite was classified as a CM1/2 carbonaceous chondrite, a rare type of primitive meteorite known for containing organic compounds and evidence of water weathering.
According to researchers, the Hillsborough meteorite is only the second witnessed fall of a CM1/2 carbonaceous chondrite ever recorded. Most known CM meteorites belong to the less-altered CM2 category, while no CM1-type meteorite fall has ever been observed.
A fragment of the Hillsborough meteorite (Image Credit: SETI Institute).
“A high fraction of compounds were the product of organic chemistry with minerals,” said organic mass spectrometry specialist Phil Schmitt-Kopplin of Technical University Munich. “We do not know if these magnesium organic compounds were contributed by brine chemistry or were simply left over from earlier impact shock processes.”
The final analysis showed tiny salt-rich pockets inside the meteorite, pointing to a formation where water once evaporated on its parent asteroid, leaving behind highly saline fluids. Scientists are comparing these minerals with samples from the asteroids Ryugu and Bennu to better understand early solar system chemistry.
These ancient salty waters may have helped protect and change the molecules needed for life before life first began. The meteorite contained carbon, nitrogen, amino acids, and other organic compounds, many of which appear to have formed through interactions between water, minerals, and carbon-rich chemistry.
“We are thrilled that nature delivered such a precious asteroid sample on our doorstep,” said curator Denton Ebel from the Department of Earth and Planetary Sciences at the American Museum of Natural History.
Chrissy Newton is a PR professional and the founder of VOCAB Communications. She currently appears on The Discovery Channel and Max and hosts the Rebelliously Curious podcast, which can be found on YouTube and on all audio podcast streaming platforms. Follow her on X: @ChrissyNewton, Instagram: @BeingChrissyNewton, and chrissynewton.com. To contact Chrissy with a story, please email chrissy @ thedebrief.org.
As new observations reveal the outer edges of IC 1101 for the first time, scientists have confirmed it is the largest known galaxy. The galaxy’s statistics are staggering, containing an estimated 3.4 trillion solar masses of stars and spanning roughly 1.7 million light-years, eclipsing every other known galaxy.
IC 1101 belongs to a class known as brightest cluster galaxies (BCGs), which form as massive galaxies spend billions of years absorbing smaller neighboring galaxies.
The new images are the deepest ever taken of the galaxy, and were revealed in a recent paper accepted for publication in a future issue of Astronomy and Astrophysics, but available now in preprint form on the arXiv server.
Blending into the Cosmic Background
Despite their enormous sizes, BCGs are notoriously difficult for astronomers to study. Because they are built through the gradual merger of many smaller galaxies, their outer regions are extremely faint, containing diffuse stellar halos and tidal tails left behind by ancient collisions. These wispy edges often blend into the free-floating gas and stars that fill galaxy clusters, making it difficult to determine precisely where the galaxy ends and the surrounding cluster begins.
Carlos Marrero-de la Rosa of the Astrophysical Institute of the Canary Islands led the new study, focusing on IC 1101, the dominant galaxy at the center of the Abell 2029 galaxy cluster.
The research relied on ultra-deep images captured with the Wide Field Camera at the Isaac Newton Telescope, allowing astronomers to resolve the galaxy’s diffuse outer boundary in unprecedented detail.
Applying a star subtraction algorithm to the composite image of the IC 1101 galaxy provides a new level of detail and contrast. Credit: Carlos Marrero-de la Rosa et al. (2026)
Battling Light Pollution
With the number of satellites orbiting Earth increasing dramatically in recent years, astronomers have raised concerns about artificial light pollution. In this case, however, the researchers faced interference from a far more distant source: foreground stars within our own galaxy.
These stars, located between Earth and IC 1101, scatter light across telescope images, washing out the extremely faint structures astronomers are attempting to detect. Since the galaxy’s outermost regions are already difficult to distinguish, any additional scattered light significantly reduces image contrast.
To overcome this problem, the researchers constructed a detailed model of how the telescope spreads light using dozens of calibration stars. The model allowed the team to accurately subtract scattered light from more than 250 foreground stars, bringing IC 1101’s faintest structures into much sharper contrast and enabling a more precise measurement of its true extent.
The Largest Known Galaxy
IC 1101’s immense scale becomes even more striking when compared with our own Milky Way. The astronomers measured IC 1101 at roughly 520 kiloparsecs across—about 17 times wider than the Milky Way’s approximately 30-kiloparsec diameter. Even after accounting for all forms of mass, including elusive dark matter, scientists estimate that the Milky Way contains only about 1 to 1.5 trillion solar masses of material, compared with the 3.4 trillion solar masses contained in the stars of IC 1101 alone.
Researchers also found evidence that the giant galaxy continues to grow. They identified eight structures beyond its main edge, two of which align with previously observed X-ray disturbances that suggest ongoing accretion. According to the team, IC 1101 likely collided with another galaxy group between two and three billion years ago, producing a merger that continues to shape the galaxy today.
Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org.
Astronomers have made a surprising discovery about one of the brightest space rocks in the main asteroid belt.
With help from some of the astronomy world’s most powerful ground-based telescopes, astronomers now report new evidence that the asteroid (44) Nysa is vastly unlike most asteroids in appearance, possessing an unusual three-lobed structure.
However, that’s not all the team behind the new research says they have discovered: the object also appears to be accompanied by a previously unknown object.
A Three-Lobed Asteroid with a Mysterious Companion
According to the international team behind the discovery, the roughly 47-mile-wide asteroid Nysa is a rare variety of space object, whose uneven appearance could offer new insights into the violent collisions that played a significant role in shaping the early solar system. Belonging to a rare class of asteroids, the object may also help scientists better understand how such objects preserve material from early in the universe.
While the Nysa’s unusual shape and accompanying object, which astronomers have characterized as a small moon, are all newly-discovered features, knowledge of the asteroid’s existence goes back more than a century, and astronomers have long studied the object due to its unusually bright surface, which is believed to be rich in a translucent crystalline mineral called enstatite.
Based on past observations, astronomers suspected that the object might possess an elongated shape, composed of two connected lobes, although the object’s exact shape remained unknown.
That all changed after astronomers turned the SHARK-VIS instrument on the Large Binocular Telescope in Arizona, and the SPHERE/ZIMPOL instrument on the European Southern Observatory’s Very Large Telescope in Chile, toward the object. Doing so allowed researchers to capture the sharpest images of Nysa ever seen from Earth.
Based on those observations, astronomers have now revealed an asteroid unlike any previously seen.
“A Remarkably Unusual Object”
Kate Minker, a Lowell Observatory astronomer and the lead author of a new paper detailing the discoveries, says the new images reveal a truly unique asteroid, in addition to offering potential clues about its formation.
Above: A maximum pixel stack of Nysa and its moon (indicated with pink arrows) imaged on Feb. 15, 2026 (Image Credit: Kate Minker et al.).
“The images reveal a remarkably unusual object,” Minker said in a statement. “The most likely explanation is that Nysa is either a contact trinary, consisting of three connected components, or an extremely irregular coherent body unlike anything we’ve previously observed.”
To determine the reasons for its odd shape, the team combined the new imagery made possible with the Large Binocular Telescope’s SHARK-VIS instrument and the SPHERE/ZIMPOL with existing photometric observations obtained by other observatories around the world. The resulting data set offered Minker and her team a detailed three-dimensional model of the asteroid.
Now, the team reports that their reconstruction of Nysa points to strong evidence that it consists of three distinctive lobes, each of which is connected by more narrow regions.
Nysa’s Not Alone
Another intriguing finding from the new data is the identification of the small satellite orbiting Nysa, which the researchers have given the temporary designation of S/2026 (44) 1.
Observed during two separate campaigns, this tiny moon is believed to be only a little more than a half mile across and orbiting at least 106 miles from its host asteroid.
“We borrowed a specialized technique from another field of astronomy, known as ‘high-contrast imaging,’ to detect the small moon whose faint light was overwhelmed by the intense brightness of the primary asteroid,” said Gianluca Li Causi of the Italian National Institute for Astrophysics in a statement.
Further Questions
Right now, scientists believe Nysa’s unusual shape was likely the result of an ancient collision, in which fragments expelled from larger bodies were gradually reassembled over time into a single body.
There are other possibilities, too. One theory holds that Nysa could be a victim of a cosmic hit-and-run incident, resulting from a collision with a much larger asteroid at some point in the very distant past—possibly billions of years ago.
Minker and her team hope that future observations of the asteroid and its newly discovered moon will provide further insights and eventually allow astronomers to calculate Nysa’s mass and density more accurately.
Doing so could ultimately bring to light which of the competing scenarios about its formation is most likely to be accurate, and ultimately, it could elevate Nysa to a small—but quickly growing—class of unusual asteroids that may preserve a record of the catastrophic conditions in our solar system, which helped shape it during its very earliest periods.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached atmicah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
In recent years, advances in ancient DNA sequencing have redefined our understanding of human evolution, revealing that our species did not emerge in isolation but repeatedly interbred with close evolutionary relatives like Neanderthals and Denisovans.
Yet one of the field’s greatest mysteries has remained unanswered: What if some of our ancestors also encountered extinct human groups whose DNA has never been recovered from fossils? Now, a recent study published in Science suggests researchers may finally have found a way to detect those long-lost relatives.
Instead of relying on ancient bones or preserved genomes, researchers developed a powerful computational approach capable of identifying genetic traces of previously unknown archaic humans using only the genomes of living people.
Applying the technique to modern populations around the world, the researchers uncovered evidence that an unidentified “ghost” hominin contributedDNA to the ancestors of all living humans before the great migration out of Africa.
Researchers also found new evidence providing evidence for the existence of an even older “super-archaic”human lineage whose genetic legacy may survive today through Denisovan ancestry in Oceania.
“Admixture between modern humans and extinct hominins has shaped the genomes of present-day individuals, but reconstructing this history has been constrained by the scarcity of archaic samples and unadmixed outgroup populations,” researchers write. “We introduce TRACE, a reference- and outgroup-free approach that uses features of ancestral recombination graphs to identify archaic ancestry.”
Past research has sequenced only a handful of high-quality archaic human genomes, all from Eurasia. While those genomes have revealed that most people outside Africa carry roughly 1 to 2 percent Neanderthal DNA and that many Asian and Oceanian populations also inherited Denisovan ancestry, scientists have long suspected those known groups represented only part of humanity’s evolutionary history.
Previous genetic studies had hinted that modern humans, especially African populations, contained fragments of DNA from unidentified archaic relatives. However, because no fossil genomes exist for those populations, proving their existence has been extraordinarily difficult.
The new method, called TRACE, short for “TRacking Archaic Contributions via ARG Estimation,” takes a fundamentally different approach. Rather than comparing modern DNA against known Neanderthal or Denisovan genomes, it reconstructs ancestral recombination graphs. These enormous evolutionary family trees trace how pieces of DNA have been inherited over hundreds of thousands of years.
These ancestral graphs preserve signatures left behind when deeply divergent human lineages interbred. Such events create unusually long branches and distinctive genetic patterns that can persist in descendants for hundreds of thousands of years. By searching for those signatures, TRACE can identify archaic ancestry even when no reference genome exists.
To test the system, the researchers first ran extensive computer simulations modeling ancient human populations and known episodes of Neanderthal interbreeding. The method consistently revealed high accuracy while producing very low false-positive rates.
The team then applied TRACE to genomes from the 1000 Genomes Project, encompassing hundreds of individuals representing populations across Africa, Europe, Asia, and elsewhere.
The program successfully recovered well-established Neanderthal ancestry in Europeans and Asians, along with Denisovan ancestry concentrated primarily in Asian populations. More intriguing, however, was the discovery of an additional category of DNA that matched neither Neanderthalsnor Denisovans.
TRACE identified between roughly 0.5 and 1.1 percent “ghost” ancestry across all modern populations examined. The genetic evidence suggests these segments originated from an unknown archaic human lineage that diverged from our ancestors roughly 830,000 years ago, before later contributing DNA to the ancestors of modern humans.
Perhaps most surprising was where that ancestry appeared.
Rather than being confined to African populations, as several earlier hypotheses proposed, the researchers found remarkably similar ghost ancestry in both Africans and non-Africans.
Most of the segments detected outside Africa were shared with African populations, suggesting the interbreeding event occurred before modern humans started dispersing across the globe roughly 50,000 to 70,000 years ago.
The findings point toward a previously unrecognized chapter ofhuman evolutionin which an unidentified human population mixed with the common ancestors of everyone alive today.
The researchers also explored where these ancient genetic fragments survive in the modern genome.
They found ghost ancestry spread across more than 70 percent of the accessible human genome, although it was far from evenly distributed. Some regions contained unusually high concentrations of ghost DNA, including genes involved in immune function and metabolism.
Even more unexpectedly, ghost ancestry persisted inside genomic regions previously believed to be largely devoid of archaic DNA.
These regions, known as “Neanderthal and Denisovan ancestry deserts,” have often been interpreted as places where natural selection eliminated archaic genetic variants because uniquely modern human versions proved advantageous.
The presence of ghost ancestry inside many of those same regions suggests the story may be more complicated. Rather than rejecting all archaic DNAequally, natural selection may have acted differently depending on which ancient human lineage contributed the genes.
The study also ventured even farther back in evolutionary time.
Focusing on genomes from Papua New Guinea, Vanuatu, and the Santa Cruz Islands, the researchers searched for evidence of “super-archaic” ancestry—genetic contributions from a lineage that diverged long before Neanderthals, Denisovans, and modern humans separated.
Previous studies had suggested Denisovans themselves may have inherited DNA from such an ancient population. TRACE now provides additional support for that hypothesis.
The team identified deeply divergent genetic segments embedded explicitly within Denisovan-derived DNA in Oceanian populations. Based on their analyses, those ancient lineages may have split from the ancestors of modern humans approximately 1.77 million years ago.
While the researchers stress this represents a conservative estimate of surviving super-archaic ancestry, the findings strengthen the idea that modern humans indirectly inherited DNA from a much older human lineage through Denisovan interbreeding.
The identity of both the ghost lineage and the super-archaic population remains unknown.
The ghost population may represent Middle Pleistocene human groups or African populations of Homo heidelbergensis that encountered the ancestors of modern humans before the Out-of-Africa migration. For the older super-archaic lineage, the researchers note that Homo erectus remains one plausible candidate given its estimated divergence time and broad geographic distribution.
Although the new method cannot yet identify specific fossil species, it provides researchers with an entirely new tool for investigating chapters of human evolution that may never yield recoverable ancient DNA.
Because DNA older than roughly one million years is extraordinarily unlikely to survive outside permanently frozen environments, computational approaches like TRACE are becoming increasingly important for reconstructing humanity’s deepest evolutionary history.
“We find evidence for at least one ghost introgression predating the OOA expansion that contributed ancestry to all present-day populations,” researchers write. “These results point to multiple layers of introgression—both direct and mediated through other archaic groups—shaping modern human genomes.”
Tim McMillan is a retired law enforcement executive, investigative reporter and co-founder of The Debrief. His writing typically focuses on defense, national security, the Intelligence Community and topics related to psychology. You can follow Tim on Twitter:@LtTimMcMillan. Tim can be reached by email: tim@thedebrief.org or through encrypted email:LtTimMcMillan@protonmail.com
A teleoperated centaur robot dubbed “Threehalves” could represent the future of manual work in some of our planet’s most dangerous environments, according to Satyress Robotics, the California startup behind the project. In disasters such as mudslides, wildfires, and rubble searches, the company says its robot can keep workers safe from on-site hazards.
The other side of the story is the robot’s creepy, almost demonic appearance, as conveyed on the provocative Satyress Robotics website, the imagery for which is so unusual that it almost gives the impression of being a parody—particularly in an age of breathless reporting on corporate claims, and sudden appearances of “viral” news stories.
Therefore, The Debrief decided to take a deeper look at this mechanical oddity that more closely resembles something out of Christopher Nolan’s The Odyssey than a project in development in a California robotics lab.
An Unsettling Robot
Threehalves isn’t exactly news; all of the available information on the robot was posted on the company website over a year ago, around the time of their only post on X. Yet it’s recently been discovered by internet outlets noting the creepy design of this robot that the company claims is here to help.
“It’s obviously quite over the top, but ultimately, this is at the extreme end of humanoid robotics in size and capability,” a company representative told The Debrief.
“People may be familiar with humanoid robots from TV/movies or product videos, but likely don’t understand just how powerful and heavy they are (especially ours, which is coming in at just under 7ft tall and 240 lbs currently),” the rep added. “Our thought is someone who didn’t know what it is should definitely stay away from it, and those that do know or are operating the machine should be reminded it’s quite dangerous.”
“If you look at something like a lathe or mill, they generally look intimidating, for good reason, even though they could be dressed up to look friendly and soft,” the rep concluded. “We’ll point out, though, that the ‘evil’ look is mostly from it being pitch black; with different colors or a wrap on it, it does not put off that vibe.”
Robot “Superpowers”
Part of Threehalves’ sales pitch is that it won’t replace jobs, but instead will merely transfer them to robotic operators using a joystick to guide Threehalves through manual work in dangerous environments. The website claims that this amounts to granting workers “superpowers,” allowing them to focus on honing their craft in new extreme situations. However, while the operator won’t have to directly get their hands dirty, Satyress Robotics told The Debrief that Threehalves is designed for line-of-sight, close-proximity operation.
“We don’t have any plans to develop much autonomy above what’s needed to keep the robot from damaging itself,” the Satyress Robotics representative said. “Our goal is to have experienced trade experts in control of the bots at all times. Forestry, for instance, is the deadliest job in the US – our goal is to save lives first and foremost, and we believe that is also enough economically to justify the cost of the bot without any autonomous productivity gain.”
Two of the robots can fit in a standard truck bed, allowing them to be easily transported to remote locations. Lacking hands, the robot can be fitted with a variety of unique attachments to hold various tools from chainsaws to drills. Of note, the robot is shown holding a gas-powered chainsaw. Exactly how it would manage to get the chainsaw started without an obvious way to pull the ripcord is unclear.
Safety First
With fears of a demonic Terminator immediately conjured up by Threehalves’ appearance, the company informs us that although “this robot is more dangerous than it looks,” the same is true of any humanoid robot, and this one comes equipped with a variety of safety features.
Ironically, one of these is the robot’s menacing horns, which significantly slow the robot down in moving through standard-size door frames, and can even be replaced with larger horns that make traversing such portals impossible.
“It’s another way to make it clear this isn’t a toy, [a] security guard, etc,” the Satyress Robotics representative said. “It’s built for one reason, for a teleoperator to do dangerous work or heavy lifting from a safe, in line of sight distance.”
“We are not looking at any use cases in commercial buildings, and certainly not residential,” they added.
The recommended methods to halt the robot may be as disconcerting as its appearance. Credit: Satyress Robotics
A Violent Stop
Additionally, air reservoirs in the chest cavity and on the robot’s back are designed to activate pin locks on all its joints, rendering the robot immobile if air pressure is lost. Imagery on the website suggests this can seemingly be accomplished by stabbing Threehalves with a knife or shooting it with a gun. Fortunately, a more pacifist option to halt the robot also exists: simply by hitting an e-stop button located on its stomach.
When pressed on why the company would design their robot to be susceptible to gunfire specifically, the representative didn’t seem to find this the least bit unusual.
“Nothing software wise/control wise, whether autonomous or teleoperated, can be guaranteed to never have any kind of control issue,” the Satyress Robotics representative said. “This gives a means to lock the brakes remotely without necessarily damaging the robot beyond repair.”
Robot Reality or Hoax?
With the unsettling design and suggestion that the robot may eventually have to be shot to stop it from injuring a human, one of this reporter’s main questions became: “Is this a joke?” The outlandish nature of the project reminds one of prankster Joey Skaggs’ tricks on the media, such as the time he convinced WNBC-TV in New York and United Press International that he had recently developed a cure-all derived from roach hormones, which he was injecting into his followers.
However, the Satyress Robotics representative confirmed that the company’s new quadrupedal working robot is no joke.
“It’s not a prank. Also, we’re building it with the goal of keeping workers safe, so we just want to make it clear we’re thinking of every edge case and looking for ways to solve them outside of software,” the representative explained. “We are quite a ways away from showing the robot in any kind of elegant motion, thus the static renders/photos.”
Given that the company hasn’t posted on social media in over a year and has no LinkedIn presence, it was unclear who was behind the operation and if it was still underway. According to the company, they will shortly be making a video to introduce themselves.
While one picture on the website appears to show a live test with a joystick, there are no videos of Threehalves in motion on the website, and our email conversation confirmed it is not yet a functional robot.
For now, the company tells The Debrief that they are currently working on component-level testing and any commercial version of the Threehalves is more than two years away.
Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org, and follow him on Twitter @mdntwvlf.
Astronomers searching for extraterrestrial intelligence have traditionally focused on a specific, narrow band of the radio spectrum. However, a new survey presented at the Royal Astronomical Society‘s National Astronomy Meeting (NAM2026) in Birmingham suggests that this approach may overlook a significant portion of the available frequencies.
The frequencies most often investigated by SETI (Search for Extraterrestrial Intelligence) programs are those between 1.42 and 1.66 GHz. This range, known as the ‘water hole’, is situated between the natural radio emissions of hydrogen and hydroxyl, the two molecules that make up water. Astronomers have regarded this quiet section of the spectrum as a reasonable place for interstellar communication, because any civilization acquainted with these molecules would probably also decide to send and receive signals in search of in that specific region.
Louisa Mason, who is carrying out research as a PhD student at the University of Manchester, focused on investigating frequencies outside the water hole range. To carry out the first SETI survey with that telescope, she used archived data from the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile. She analyzed data originally collected for other astronomical studies instead of requesting new observation time.
Hunting for Signals in Unclaimed Territory
Mason focused on two narrow frequency bands in the ALMA Band 3 data, looking for narrowband signals that might be the result of technology rather than natural astrophysical origins. In the four observations that she examined, she did not discover any candidates for technosignatures above her detection threshold.
“For decades, SETI searches have concentrated on a relatively small part of the radio spectrum. We wanted to ask what might happen if we looked somewhere very different,” Mason said. “The millimetre and submillimetre radio bands remain almost completely unexplored for SETI, so this is really about opening up a new area of parameter space to search.”
A lack of results does not rule out the possibility of alien transmitters. It only means that none appeared in this specific region of the sky and frequency range. Mason describes the survey as a proof of concept, showing that high-frequency telescopes like ALMA could play a much larger role in future SETI efforts.
A Much Bigger Haystack Than Anyone Realized
The research also revealed a gap in how astronomers count the stars they have actually examined. Each time a telescope observes a single target, it also collects light from many other stars in the same field of view. Researchers refer to this as “stellar bycatch.”
Previous SETI surveys have made this bycatch estimate based on the Gaia catalog, which is the European Space Agency‘s survey of the stars. However, Gaia has certain limitations such as its magnitude cutoffs, uncertainties when measuring distant stars, and difficulties in crowded areas. To overcome these limitations, Mason used the Besançon Galactic Model, a simulation of the Milky Way’s stellar population that includes stars that are too faint or too far away for Gaia to detect.
When Mason applied the model to a previous survey of 1,327 telescope observations, the estimated number of stars observed increased from about 288,000 with Gaia to over 6.1 million with the galactic simulation.
“One of the most exciting things about this work is realizing that we’ve surveyed many more stars than initially thought,” Mason said. “Even a very small observation can contain a huge number and diversity of stars that we might never have intended to study. By combining high-frequency observations with galactic simulations, we can better understand exactly what we’ve searched and where we should look next.”
Recommendations for SETI
Mason carried out this research in collaboration with Professor Michael Garrett, Dr. Andrew Siemion, and Dr. Kelvin Wandia. The team argues that expanding both the radio frequencies searched and the number of stars included could reduce the influence of human assumptions on SETI strategies. Whether these broader searches will detect technosignatures missed by traditional water-hole surveys remains unknown.
Austin Burgess is a writer and researcher with a background in sales, marketing, and data analytics. He holds an MBA, a Bachelor of Science in Business Administration, and a data analytics certification. His work focuses on breaking scientific developments, with an emphasis on emerging biology, cognitive neuroscience, and archaeological discoveries.
The storm reached a G5 rating, which is the highest level on the geomagnetic storm scale used by NOAA, as a result of five coronal mass ejections reaching Earth within a period of two days. Researchers with the Space Environment Impacts Expert Group (SEIEG) stated that although the storm caused only relatively minor disruption, it revealed shortcomings in the UK’s capacity to monitor and prepare for more severe space weather events.
Researchers estimate that the May 2024 storm was a one-in-13-year event. By contrast, a Carrington-class storm, like the 1859 event that defines the standard for extreme space weather, has about a 1% chance of occurring in any given year. This means that a much more disruptive storm is still possible. The SEIEG report uses the 2024 storm as a practical example to assess how prepared the UK is for a more severe event.
“The Northern Lights were the most visible sign of the May 2024 storm, but they were only one part of a much broader space weather event that tested the UK’s critical infrastructure. The storm highlighted where we need better monitoring, better forecasting and more research so we’re prepared for a more severe event in the future,” Horne said.
The Blind Spot in Britain’s Power Grid
Geomagnetic storms create electric fields at Earth’s surface that can drive geomagnetically induced currents (GICs) through long conductive systems, including power transmission networks. High levels of GICs can overheat transformers, disrupt their normal function, and in severe cases cause damage that may lead to failures across parts of the power grid.
Currently, there are no GIC monitors in operation in England or Wales. The SEIEG report recommends establishing a network of monitors to assess how much current various transformer designs can tolerate before sustaining damage.
New Zealand as the Model
The report cites New Zealand as an example of effective monitoring. Since it is at a similar geomagnetic latitude, the country faces similar space weather risks, and its grid operators monitor around 93 transformers across 28 substations. Unlike in England and Wales, where monitoring is absent, these operators have verified their models using actual measurements and implemented operational mitigation procedures during the May 2024 storm.
Crowded Skies, Rising Risk
The storm also affected satellites in orbit. Almost 5,000 satellites adjusted their orbits during the storm. Satellites licensed in the UK saw their number of collision warnings rise by 35%. Since there are now so many objects in low-Earth orbit, a serious storm could raise the risk of collisions, possibly resulting in debris and causing additional incidents.
Preparing for Future Storms
SEIEG also recommends improving forecasts of coronal mass ejections and solar energetic particle events to provide two to three hours of warning before severe geomagnetic storms reach Earth. Improved forecasts could allow grid operators, satellite controllers, and airlines to take protective measures before severe geomagnetic storms arrive.
“One of the biggest lessons from the May 2024 storm is that we still have important gaps in our monitoring and understanding of how severe space weather could affect UK infrastructure,” said Horne. “We were fortunate that this was not a one-in-100-year event. We now have an opportunity to strengthen our monitoring, improve our forecasts and make sure the UK is better prepared before a much larger storm occurs.”
The 14 recommendations are now under review by the UK government. Whether these steps will be taken before a Carrington-scale storm occurs remains uncertain. With this extreme class of storms remaining a realistic possibility, the researchers argue that improving monitoring and forecasting now could reduce the impact of a future extreme event.
Austin Burgess is a writer and researcher with a background in sales, marketing, and data analytics. He holds an MBA, a Bachelor of Science in Business Administration, and a data analytics certification. His work focuses on breaking scientific developments, with an emphasis on emerging biology, cognitive neuroscience, and archaeological discoveries.
An international team of researchers who extracted ancient mammoth DNA from a sample of 500 bones reports that Ice Age humans selectively targeted female woolly mammoths.
The results of the team’s work show a contrast in sex ratio and mammoth remains, and found that the connection to large bones associated with ancient human activity was dominated by females.
“Whether these massive mammoth bone accumulations were formed naturally or by human hunting has been debated for decades”, says David Díez del Molino, Researcher at the Centre for Palaeogenetics and co-senior author of the study, in a statement. “By comparing the genetic sex ratios of hundreds of mammoths from natural settings with those found in these archaeological contexts, we can now infer that human activity was the primary driver behind these bone accumulations.”
The team took samples from a total of 521 woolly mammoths, including 448 individuals whose DNA was sequenced for the first time. The study, the team says, became the largest genetic analysis of mammoths ever conducted.
Archaeologists have been wondering for years if the large bone piles they found were created naturally or organized by humans. The new research pointed to a clear answer: these discoveries can be attributed directly to human hunting and organization.
Excavation in Langmannersdorf 2025. Photo: Marc Händel/Austrian Academy of Sciences (Image Credit: Marc Händel/Austrian Academy of Sciences).
The researchers determined the sex of each mammoth based on genetics and found that remains from natural settings were more likely to be male, with around 66 percent being males and 34 percent females. Scientists believe these reveal a direct connection to the behavior of mammoths, much like modern elephants, where adult males were more likely to be trapped in sinkholes or other related natural disasters, which would increase the chances of their bones being preserved, compared to females.
However, the sites connected to human organization and consumption told a different story. Around 70 percent of the mammoths found were female, suggesting that during the Ice Age, strategic hunting was being undertaken. The question remains why hunters preferred females over males, which also seems unusual since killing more female mammoths would decrease the population, and therefore decrease the overall food supply of Ice Age hunters.
“While it is tempting to assume that hunters would have targeted females because they were smaller than adult males, the reality may have been more complex. If mammoths behaved like modern elephants, females living in matriarchal herds may have had group defences that would have made encounters with herds equally or even more risky,” says Hannah M. Moots, Postdoctoral Researcher at the Centre for Palaeogenetics and lead author of the study.
Although females were generally smaller than fully grown bulls, researchers caution against assuming they were easier prey.
“Another possibility is that female-led herds moved across the landscape in more predictable ways than solitary males, meaning Upper Palaeolithic hunter-gatherers may simply have encountered them more frequently, whether for hunting or scavenging”, Moots adds. The researchers also suggest that female herds could have followed migration routes, therefore making their movements more predictable for Upper Paleolithic hunter-gatherers.
The study examined 11 major archaeological sites dating from 30,000 to 20,000 years ago, a time when mammoths were essential to human survival. Hunters during this period used nearly every part of the animal for food, clothing, shelter, tools, and even art.
By analyzing DNA from 100 mammoths found at archaeological sites and 421 from natural deposits, researchers assembled the largest dataset of its kind, revealing new insights into mammoth behavior and Ice Age hunting practices.
The analysis also uncovered the first known case of X0/XX mosaicism, a genetic condition similar to Turner syndrome in modern humans, in an extinct species. The affected mammoth, from Wrangel Island, provides a rare glimpse into the biology of these ancient giants.
Chrissy Newton is a PR professional and the founder of VOCAB Communications. She currently appears on The Discovery Channel and Max and hosts the Rebelliously Curious podcast, which can be found on YouTube and on all audio podcast streaming platforms. Follow her on X: @ChrissyNewton, Instagram: @BeingChrissyNewton, and chrissynewton.com. To contact Chrissy with a story, please email chrissy @ thedebrief.org.
Two dormant volcanoes in the Andes are shown “connected” by the glowing ribbon of a distant cosmic feature stretching across the sky between them, in a rare cosmic alignment echoing ancient legends about these neighboring peaks—and all of it was captured in one of the most breathtaking astronomy images in recent memory.
The photo (seen below) was captured by astrophotographer Gonzalo Laserna Vargas and showcased by the American space agency this week. In it, we see Parinacota and Pomerape, a pair of ancient stratovolcanoes that form an unmistakable part of the landscape along the border between Bolivia and Chile.
In local folklore, these two prominences represent a prince and princess whose forbidden romance forever linked them in myth. Although no geological evidence exists for any physical links between them, astronomy recently helped fulfil that mythic connection in an unprecedented night sky display. The unique conditions that made this image possible, as well as the planning and preparation that went into it, were described by Vargas in a recent post on his Instagram account.
In the new imagery, recently featured as NASA’s Astronomy Picture of the Day, Barnard’s Loop—a vast arc of glowing hydrogen gas surrounding part of the constellation Orion—is showcased in a long-exposure photograph as it appears behind the two volcanoes.
The image was captured coinciding with the appearance of the nebula directly behind the volcanoes, and from an angle that causes the visible portion of the celestial object to appear as though it is rising from the mouths of the ancient volcanic peaks, uniting them through what resembles a colorful, luminous aerial display.
Despite the awe-inspiring appearance of the imagery, as part of the larger Orion Molecular Cloud, Barnard’s Loop remains at a distance of around 440 parsecs from these dormant volcanic peaks—in other words, close to 1,400 light-years away.
a Cosmic Convergence
Capturing a cosmic convergence at this scale required careful planning by Vargas, who took a sequence of exposures from the same location in Bolivia in mid-April, at a time when the nebula appeared perfectly in between the two mountain summits.
One thing that helped with this is the fact that Barnard’s Loop is one of the largest emission nebulae visible from Earth. Although it is far too faint to be seen easily with the naked eye, the nebula’s vibrant pink and orange colors appear in long-exposure photography, revealing its eerie halo fueled by the presence of hydrogen gas.
Along with Barnard’s Loop, several of the night sky’s most recognizable objects also make an appearance in Vargas’s photo. Near the center of the image is the Orion Nebula, which happens to be one of the nearest stellar nurseries to Earth. Such areas of the cosmos are places where new star formation occurs within vast clouds of cosmic dust and gas.
Higher in the image, another striking feature—the Rosette Nebula—can also be seen, revealed as a massive cloud of glowing gas around a small group of young stars.
A Cosmic Neighborhood United in Imagery
Although each of these features is separated by hundreds or even thousands of light-years from Vargas’s imagery, they all appear in a singular frame, producing a dramatic cosmic backdrop for the ancient volcanic landscape they appear above.
Hence, for reasons that are easy to see, Vargas’s photo was named NASA’s Astronomy Picture of the Day for July 28, 2026, revealing another artful view of the cosmos that relies on far more than just advanced equipment—it also showcases the necessity for astronomical knowledge, careful preparation, and, of course, impeccable timing.
The result in this case is a moment captured in time, where mythology, an ancient volcanic landscape, and the cosmos all converge within a single frame.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached atmicah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
Chinese researchers are using laser technology to vastly extend the flight time of drones, marking a significant shift in UAV capabilities.
The achievement was reported by researchers from China’s Civil Aviation University, who reported their findings in laser-based drone charging technology in a recent article published in Matter & Light.
The new drone concept utilizes a lightweight receiver, repurposing solar cell technology to absorb laser light and convert it into electricity to power a device.
Endless Drones
“Imagine a future where drones inspecting forests, monitoring disasters, or delivering packages no longer need to land frequently to replace batteries,” said senior author Jianhua Han of Civil Aviation University of China. “As drones take on longer missions, battery life has become one of the biggest barriers.”
At the core of the breakthrough is perovskite, a class of synthetic compounds with a crystalline structure highly conducive to solar power applications. The team developed a perovskite laser cell-thermoelectric (PLC-TE) tandem device that optimizes a solar cell to accept laser energy.
In laboratory tests, the perovskite laser receiver effectively powered the propeller on a stationary drone model (Image Credit: Y. Han and X. Han et al., Matter & Light)
The cell’s perovskite converts laser energy into electricity, which can be a messy process, as some of the power is lost as heat. The thermoelectric layer addresses this problem by capturing heat and converting it into electricity via the temperature differential between its warmer, laser-facing side and its cooler side. However, that contrast requirement can be an issue when the laser uniformly heats the entire drone, reducing the efficiency of that heat-to-energy conversion.
Managing Overheating
“When we tested the device under a high-power laser, the thermal camera showed temperatures of 80 to 90 degrees Celsius,” Han said. “That was much higher than we expected and made us realize that heat buildup was a far more serious problem than we had imagined.”
To mitigate overheating concerns, the receiver was mounted on the drone’s wings, kept separate from other components, and paired with heat-blocking technology to enable laser-to-electric energy conversion without overheating sensitive electronics.
This heat-blocking technology included nanocrystals embedded in the PLC-TE tandem device, which acted as a thermal barrier due to their poor thermal conductivity. With the nanocrystals in place, the researchers tested the conversion device on its own and observed a significant slowdown in heat flow during prolonged laser exposure, which would cool the drone overall.
This PLC-TE device was bombarded with a green laser in a laboratory experiment and converted 38.49% of the beam’s energy into electricity, a high percentage compared to other wireless charging systems in similar scenarios.
Drone Tests
Next, the team integrated the energy conversion system onto a stationary lab drone and also added airflow channels to the wings. In subsequent laboratory tests, laser bombardment supplied sufficient energy to power the drone’s propeller, while the airflow channels effectively cooled the thermoelectric layer’s cold side, maximizing heat-to-electricity conversion.
“Previous studies largely focused on the materials or the device itself,” Han explained. “We wanted to think beyond the laboratory, to how the system could actually be integrated into an aircraft, cooled during operation, and made compatible with flight. It isn’t just a materials science problem; it’s an engineering one.”
Work continues on this wireless drone charging system, with outdoor flight tests on a lightweight frame scheduled. These will be paying particular attention to the system’s reliability under real-world outdoor conditions. However, the team notes that energy conversion efficiency will not be their sole research area, as the accuracy of laser tracking will be essential to the system’s safe operation.
“Our work demonstrates the possibility of ‘refueling aircraft with light,’” Han concluded. “Going from 1 to 100 will require solving many engineering challenges, but we hope this provides a starting point for future development.”
Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org.
Beneath the seemingly unbroken canopy of the southwestern Amazon rainforestlies evidence of one of the largest monumental landscapes ever discovered in the ancient Americas.
According to new research published in Nature, what archaeologists once believed were scattered ceremonial sites are instead part of an enormousprecolonial civilization that may have changed vast stretches of the Amazon nearly 2,000 years ago.
Using airborne LiDARcapable of penetrating forest cover, an international team of researchers says they have identified hundreds of previously unknown earthworks, estimating that more than 20,000, and perhaps as many as 30,000, remain spread across southwestern Amazonia.
The findings dramatically expand the known scale of the so-called Aquiry civilization and suggest that millions may have inhabited the region during its peak nearly 2,000 years ago, forcing a reconsideration of how densely populated and intensively managed the ancient Amazon may have been.
“We also propose that the total human population of the area in 100–300 AD was 1.25–3 million people,” researchers write. “If similar results are found elsewhere in Amazonia, the total precolonial population density and its effect on the current Amazonian soil and forest structure, biodiversity, and even some modeling of the global climate should be re-evaluated.”
The study represents one of the most ambitious archaeological surveys ever conducted in the Amazon. Researchers flew more than 2,700 miles across the forests of Brazil’s Acre and Amazonas states usingairborne LiDAR, a laser-mapping technology able to see through gaps in the dense treetops to produce detailed maps of the landscape below. Those maps revealed hundreds of geometricearthworksthat had remained hidden for centuries.
The newly discovered structures include squares, circles, rectangles, and multilateral enclosures connected by roads and clustered into monumental complexes.
Some feature ditches up to 43 feet wide and more than 16 feet deep, with towering earthen embankments rising alongside them. Although a handful of these earthworks had previously been identified in deforested areas using satellite imagery, LiDAR revealed that those earlier surveys had dramatically underestimated just how many remained obscured beneath the forest.
Airborne LiDAR imagery reveals several of the geometric earthworks hidden beneath the Amazon rainforest canopy. The newly identified ceremonial complexes—featuring squares, circles, and interconnected enclosures—are part of a vast precolonial landscape that researchers estimate may contain more than 20,000 monumental sites. (Image Source: Pärssinen, et al, Nature)
One of the study’s most striking findings was that LiDAR scanning uncovered roughly five times more earthworks than satellite imagery had detected across the same landscapes.
In one survey block, researchers had previously identified only 30 structures using conventional imagery. Meanwhile, LiDAR revealed 156. Assuming similar results across the wider region suggests that between roughly 24,000 and 30,000 earthworks may exist within the estimated boundaries of the Aquiry civilization.
Those numbers alone would rank the region among the most monument-rich archaeological landscapes in the world.
For decades, archaeologists have debated whether much of Amazonia could have maintained large, complex societies before European contact. Prevailing interpretations portrayed much of the rainforest as environmentally limiting, capable of sustaining only relatively small and dispersed populations. However, more recent discoveries, including ancient cities in Bolivia and Ecuador, have steadily challenged that assumption.
Now, these latest findings suggest the region may have supported an even larger and more sophisticated society than researchers once imagined.
Rather than representing isolated ceremonial sites scattered through an otherwise untouched forest, the researchers argue the earthworks belonged to a civilization extending about 71,000 square miles, representing about three times larger than previous estimates of the Aquiry cultural area.
Many of the geometric enclosures appear not to have been permanent settlements themselves. Instead, researchers believe they served as ceremonial, political, and public gathering places where dispersed communities periodically assembled.
Similar patterns of temporary gathering centers are known from the Inca Empire, where populations converged for rituals, governance, and communal events despite living across broad landscapes.
Constructing these massive earthworks would have demanded sophisticated planning, organized labor, mathematical knowledge, and long-term social coordination. According to the study, some of these ceremonial centers remained in use for nearly 1,500 years, indicating remarkable cultural continuity across generations.
Estimating how many people actually lived within this landscape presented a separate challenge.
Rather than simply multiplying earthworks by a fixed population estimate, the researchers combined several independent lines of evidence. They examined radiocarbon dates to determine how many sites were occupied simultaneously, compared the earthworks with later mound villages built in the same region, incorporated ethnographic information from Indigenous communities, and evaluated the labor required to construct and maintain the monumental enclosures.
Their study indicates the civilization reached its greatest extent between approximately A.D. 100 and 300. During that period, somewhere between one-quarter and roughly 60 percent of the known ceremonial centers may have been active simultaneously.
Assuming each ceremonial center served communities of roughly 300 people, the researchers estimate the region’s population reached between about 1.25 and 3 million people during its peak. After accounting for earthworks that LiDAR may have missed beneath dense forest, they conclude the total could have been as high as 3.8 million.
Those estimates substantially exceed many previous reconstructions of southwestern Amazonia and imply population densities rivaling or exceeding some later historical agricultural societies.
Equally significant is what these discoveries reveal about how ancient Amazonians altered their environment.
The study points to fertile soils rich in nutrients, evidence of extensive cultivation of maize, squash, manioc, beans, peanuts, sweet potatoes, and chili peppers, as well as widespread management of Brazil nut groves and numerous economically important palm species.
Rather than exhausting the rainforest, researchers contend these communities actively managed forests, soils, and waterways throughout centuries, creating ecological legacies that remain visible today in the composition and biodiversity of Amazonian forests.
Present-day ecological studies have increasingly shown that many Amazonian forests long regarded as pristine wilderness actually bear the imprint of thousands of years of Indigenous landscape management. If similar densities of monumental earthworks are identified elsewhere across Amazonia, researchers argue that assumptions about precolonial population sizes, biodiversity patterns, soil formation, and even climate models may need substantial revision.
The work additionally underscores the key role of LiDAR in modern archaeology. Over the past decade, the technology has revealed hidden Maya cities beneath Central American jungles, extensive urban complexes in the Bolivian Amazon, and extensive settlements in Ecuador’s Upano Valley.
Nevertheless, researchers caution that important questions remain unanswered. The southeastern limits of the Aquiry civilization are still poorly understood because large portions of Rondônia have yet to receive comparable archaeological investigation. Dense vegetation also continues to obscure portions of the landscape, meaning manyearthworks almost certainly remain undiscovered even after LiDAR surveys.
“These ancient achievements constitute an important legacy that is still observable in the soil, and the composition and biodiversity of the contemporary tropical forest,” researchers write. “This legacy should be fully considered in future studies of Amazonia, including climate modeling and sustainable land-use planning.”
Tim McMillan is a retired law enforcement executive, investigative reporter and co-founder of The Debrief. His writing typically focuses on defense, national security, the Intelligence Community and topics related to psychology. You can follow Tim on Twitter:@LtTimMcMillan. Tim can be reached by email: tim@thedebrief.org or through encrypted email:LtTimMcMillan@protonmail.com
Analysis of fallout debris caused by the World War IIatomic bombing of Hiroshima, Japan, on August 6th, 1945, has revealed that the event led to entirely new mineralogical and metallurgical phases that created a previously unidentified multicomponent metallic alloy that cannot be produced under ordinary conditions.
The Università degli Studi di Firenze researchers behind the new analysis said that understanding the hiroshimites, the name scientists have given to these unique materials, could offer unique insights into the types of natural events that can also create novel forms of matter. The researchers also note that the explosion site provides researchers with a natural laboratory to study the effects of natural and human-made high-energy events.
In a newly published study, Professor Luca Bindi from the university’s Department of Earth Science and colleagues explain that high-energy events like the nuclear explosions that ended World War II generate brief, transient physicochemical environments “comparable in nature to hypervelocity planetary collisions, meteor impacts, and lightning strikes.”
Like nuclear explosions, such naturally occurring events produce extreme temperatures, rapid fluctuations in ambient pressure, and the rapid vaporization of “heterogeneous materials.” These transient environments are followed by a rapid condensation of melts and aerosols generated by expanding fireballs.
The study authors note that these types of extreme environments “can form mineralogical and metallurgical phases that cannot be produced under ordinary conditions.” This includes the Hiroshima bombing, which generated a large nuclear ‘airburst’ over a large urban environment filled with several categories of human-made materials.
“The detonation produced a fireball reaching temperatures exceeding 7000°C within seconds, entraining and vaporizing building materials, soils, metals, glass, and water into a turbulent plasma cloud,” the study authors explain.
More recently, scientists have shown that the event created an abundance of micrometer-to-millimeter-scale “fallout debris” that has remained preserved in beach sands of Hiroshima Bay.
Earlier Studies Found Unique Glasses Created by the Explosion
Before their examination, the researchers noted that previous microanalytical studies of many of the glasses produced during the World War II Hiroshima explosion are dominated by calcium-aluminum-silicon compositions, with microcrystalline traces of mullite and anorthite. The authors said this combination implies that they were formed at “temperatures exceeding ∼1800°C.” Additional analyses confirmed the hiroshimites condensed from a vapor during “rapid cooling” of the fireball.
“Together, these findings established that the Hiroshima explosion produced a previously unrecognized class of anthropogenic high-temperature condensates formed under near-atmospheric pressure but extreme thermal and redox gradients,” they write.
Still, they also suspected that such fireball conditions capable of producing silicates could also produce “chemically complex metallic phases.”
For example, multi-component alloys made from five or more principal metallic elements are typically made through a complex process of controlled melting and solidification. However, they note that the complex process fundamentally requires extreme mixing, high temperatures, and rapid quenching, “conditions that arise during meteorite impacts and in nuclear fireballs.”
At Hiroshima, the explosion vaporized structural steels, aluminum alloys, copper-bearing components, and other industrial metals. In theory, the team said that the formation of such metallic alloys “becomes plausible” under the extreme conditions experienced during the explosion
“Unlike conventional metallurgical environments, such a system would permit stochastic
atomic mixing of diverse metallic species (usually not present in common stainless steels) before rapid solidification, potentially stabilizing metastable phases,” they explain.
To test the theory, the study authors examined several hiroshimite samples they suspected may contain complex metallurgical alloys. As hoped, the team successfully identified a sample containing many micrometer-sized metallic fragments. A closer examination revealed the fragments were an alloy of Iron and Chromium. When the team examined these fragments, they found what they termed a “previously undocumented multicomponent alloy particle.”
“The alloy occurs within the same sedimentary units in Hiroshima Bay as the previously described silicate condensates and exhibits microstructural and compositional characteristics consistent with rapid condensation and quenching from a multielement metallic vapor,” they write.
When discussing the scientific significance of the finding, the researchers said their work “expands the known spectrum of materials generated by nuclear detonations.” They also note that the study supports the idea that human-made (anthropogenic) plasma events “can produce complex metallic phases in natural settings.”
“[Hiroshima] provides a unique natural laboratory for studying rapid alloy nucleation under extreme nonequilibrium conditions.”
Christopher Plain is a Science Fiction and Fantasy novelist and has spent the last six years as Associate News Editor and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him at christopher@thedebrief.org
Impulse Space has unveiled its first electric propulsion system, designed to work in tandem with chemical rocket engines to extend the capabilities of spacecraft during long space missions.
On Tuesday, the California-based company revealed Electra, which complements traditional rocket propulsion, rather than replacing it, providing a new layer of efficiency for spaceflight aided by electric thrusters.
“As launch becomes more accessible, the next frontier is enabling spacecraft to do more once they arrive in orbit,” said Tom Mueller, founder, CEO, and chief technology officer of Impulse, in a statement.
The Future is Electric
While electric propulsion systems produce lower levels of thrust compared to chemical rockets, they also consume far less propellant during spaceflight. Because of this, they are an ideal candidate for certain tasks, such as station keeping—the process where a spacecraft’s assigned orbit is maintained over long periods of months, or even years.
Presently, as much as 50% of a conventional spacecraft’s chemical propellant can be required solely for maintaining its orbit for the duration of a mission. Assigning those duties to an electric propulsion system allows chemical fuel to be reallocated toward higher-value mission operations, which include rapid orbital transfers and time-sensitive maneuvers.
Rapid Pace for Development
Electra was developed entirely in-house and in under a year, the company said in a statement this week. Engineers required less than half that time to advance from initial design stages to completion of a functioning propulsion system.
Almost all major components, which include Electra’s thruster and supporting avionics systems, were designed, manufactured, and tested in-house.
“The best part of building Electra has been the opportunity to move fast and try new things,” said Charlie Kelly, Lead Electric Propulsion Engineer at Impulse.
“We get to turn ideas into plasma in a matter of weeks or months, not years,” Kelly added.
Advancing Future Space Propulsion
Presently, the company is rapidly developing its next-generation designs, and qualification is currently underway for Electra’s integration with Mira, Impulse’s orbital transfer vehicle.
An initial in-space demonstration is expected to take place aboard Impulse’s GEO Express 1 mission next year, as part of the Caravan 1 mission.
For Impulse, the new propulsion system represents another step toward building what it characterizes as a complete in-space mobility architecture—extending beyond launch itself to support satellite servicing, orbital transfers, cargo transportation, and future operations throughout cislunar space and beyond.
With an ever-increasing level of commercial activity in Earth orbit, such technologies will help to propel spacecraft for much longer periods, enabling long-duration space missions that reduce overall costs and fuel requirements.
“Our strategy has always been to develop the mobility technologies needed to support all missions after launch,” Mueller said this week, adding that “electric propulsion is an essential component of that strategy.”
Additional details about the company’s novel propulsion designs can be found at Impulse Space’s website.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached atmicah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
For more than two millennia, astronomers have puzzled over a stellar mystery recorded by some of history’s greatest skywatchers. Hipparchus, Ptolemy, and the Persian astronomer al-Sufi—all separated by more than 1,000 years—each described Theta Eridani as one of the brightest stars in the night sky. Yet today, the previously celebrated star barely ranks among the more noticeable stars visible to the naked eye.
A new astronomical study published onarXivsuggests that thoseancient observersmay have unknowingly recorded an extraordinarily rare stellar event. The star system remaineddramatically brighterthan normal for roughly a millennium before fading back to its present appearance sometime between the 10th and 16th centuries.
If confirmed, the finding would be among the longest-lived stellar transients ever proposed, fusing modern astrophysics with historical astronomy to reconstruct an event spanning centuries rather than days or months.
Together, those observations allowed the researchers to reconstruct the architecture and evolutionary state of the Theta Eridani system and to propose a physical mechanism that could explain its mysterious ancient brilliance.
“The remarkable combination of orbital and stellar parameters hints that the historical brightening of Theta Eridani was due to a millenary transient phase,” researchers write. “This strengthens the case that the apparent brightening was real and not due to an error by three different ancient observers, as has been commonly claimed in the past.”
Today, Theta Eridani, also known by its traditional name Acamar, shines at approximately magnitude 2.9, making it a respectable but hardly spectacular star marking the end of the constellation Eridanus. Yet ancient records tell a very different story.
Hipparchus described it as an exceptionally bright star around 129 BC. Roughly 250 years later, Ptolemy ranked it among only fifteen first-magnitude stars in the Almagest, effectively placing it among the thirteen brightest stars visible in the night sky.
More than 800 years afterward, the Persian astronomer al-Sufi independently retained that same first-magnitude classification while revising the brightness estimates of many other stars toward values that closely match modern observations.
The sharp contrast between the historical accounts and Theta Eridani’s modest appearance today has made the star one of astronomy’s most enduring and compelling mysteries.
Researchers examined long-standing alternative explanations, including simple observational mistakes, copyist errors in ancient manuscripts, confusion with the much brighter star Achernar farther south, and even errors caused by atmospheric extinction near the horizon. One by one, they argue the evidence weighs against those explanations.
Theta Eridani would not even have been visible to the Greek and Arab astronomers because of Earth’s changing orientation over time. Likewise, statistical analyses of nearly 1,000 stars contained in the Almagest show that Theta Eridani represents the single largest discrepancy between ancient and modern brightness estimates, rather than part of a wider systematic mistake.
The historical trail eventually changes around the dawn of the Age of Exploration. By the late 1500s and early 1600s, after European navigators began mapping the southern skies, star catalogs consistently described Theta Eridani as only a third-magnitude star—essentially the same brightness observed today.
That suggests the bright phase had already ended.
To investigate whether Theta Eridani itself could plausibly have undergone such a transformation, the team turned to modern astronomical observations.
Rather than a single star, Theta Eridani consists of three stars. The primary component itself is a remarkably tight binary whose two stars orbit one another every 4.1077 days at a separation of just 0.083 astronomical units—roughly one-fifth the distance between Mercury and the Sun.
Using interferometric measurements from the VLTI, together with spectroscopy and precision photometry from TESS, the researchers determined that the two stars each contain just over twice the Sun’s mass and have swollen to approximately 4.3 and 4.0 solar radii.
Those enlarged sizes are significant because both stars have expanded to nearly 80 percent of the volume where gravity from one star begins pulling material toward the other, a region around a star in a binary system known as the Roche lobes. The close gravitational interaction also produces measurable ellipsoidal distortions that TESS detects as subtle, rhythmic brightness variations every orbit.
Researchers’ evolutionary modeling further revealed that the primary star occupies an unusually brief stage within stellar evolution, having only recently exhausted hydrogen in its core and begun transitioning into a subgiant. That evolutionary timing may be critical.
According to the researchers, Theta Eridani may once have possessed a much more elongated orbit. As the primary expanded, it could have begun overflowing its Roche lobe during each close approach, transferring material toward its companion and possibly generating an extended common envelope surrounding both stars.
Unlike the violent stellar explosions astronomers typically classify as transients, this proposed event would have evolved extraordinarily slowly. Instead of lasting weeks or years, the researchers suggest the envelope may have persisted for roughly a thousand years while gradually extracting orbital energy from the binary.
Because the surrounding envelope would have remained optically thick, it could have radiated from an area far larger than either star individually, making the entire system appear nearly ten times brighter than it does today.
Researchers’ calculations suggest that such an envelope could have reached roughly 20 times the Sun’s radius while needing only a tiny amount of encircling material, because that material would be continually replenished and slowly ejected over hundreds of thousands of orbits.
Importantly, researchers stress that this is still a proposed physical explanation rather than a demonstrated one. Modeling the detailed hydrodynamics of eccentric mass transfer and long-lived common envelopes remains beyond the scope of the current work.
Nevertheless, they argue that the unusual combination of orbital geometry, stellar evolution, and historical observations makes the scenario physically plausible.
The study of Theta Eridani also raises wider implications for time-based astronomy.
Modern astronomical surveys are exceptionally good at finding dramatic events that unfold over minutes, days, or years. A stellar brightening lasting centuries, or even a millennium, would be almost impossible to recognize within a human lifetime. Researchers suggest there may be other long-duration stellar transients hidden among ordinary-looking stars whose histories have been forgotten.
If their interpretation proves correct, some of humanity’s earliest astronomers may have unknowingly documented one of the most unusual stellar phenomena ever proposed—not an exploding star, but a binary system trapped in an exceptionally slow evolutionary episode which lit up the night sky for generations before quietly receding into obscurity.
“Although modern photometric surveys have had an observational coverage of a few years to a few decades rather than two millennia like Theta Eridani, they are sensitive to objects up to 14 magnitudes fainter than the naked eye limit,” researchers write. “Therefore, there could be unexplored or unexplained Theta Eridani-like transients that either brightened or faded in current data.”
Tim McMillan is a retired law enforcement executive, investigative reporter and co-founder of The Debrief. His writing typically focuses on defense, national security, the Intelligence Community and topics related to psychology. You can follow Tim on Twitter:@LtTimMcMillan. Tim can be reached by email: tim@thedebrief.org or through encrypted email:LtTimMcMillan@protonmail.com
A group at the Institute of Science Tokyo simultaneously measured the activity of thousands of neurons in two mousebrain regions and found that the areas sometimes shared timing information but maintained more independent representations at other times. The researchers, led by Associate Professor Riichiro Hira, maintained that this flexibility enables the brain to remain stable as it adapts to changing requirements.
A Task Built to Catch the Brain Switching Modes
Hira’s team created a task to highlight this timing mystery. They trained mice to expect rewards at intervals that switched between 6 and 12 seconds, without any break to mark the end of one trial and the start of the next. Since there was no pause, the mice had to keep updating their internal sense of time throughout the experiment, instead of resetting their mental stopwatch for each new trial.
The mice eventually figured out the pattern. At first they expected a reward every six seconds even if the time they had to wait was longer than this, but by the end of the training session, their behavior indicated that they had learned to anticipate both reward intervals. This showed that the mice were capable of keeping track of both durations and of predicting which one would come next.
While the mice performed the task, the researchers recorded activity in their secondary motor cortex and the posterior parietal cortex using wide-field two-photon calcium imaging. Both regions play key roles in planning, prediction, and working memory.
Two Regions, Two Kinds of Mistakes
The neurons fired in sequence in each brain area, with different cells becoming active at different times. This sequence showed that each region was monitoring the passage of time.
The researchers also identified two kinds of errors in the neural activity. In some cases, both areas made the same mistake when assessing the passage of time. These coherent errors suggested that both regions sometimes shared the same timing drift. In other instances, only one region was inaccurate while the other remained correct. These independent errors suggested that one region could temporarily maintain a different timing representation from the other. Independent errors were more frequent than coherent ones, and this ratio remained the same in all the mice examined.
If the brain regions were just randomly out of sync, you’d expect the ratio to change. However, it didn’t, which suggests that the brain has a built-in way to balance working together and working independently.
Modeling the Switch Between Coherence and Independence
To identify this mechanism, the team built a computational model with two recurrent neural networks linked by sparse, long-range connections and exposed to the same background noise. The model produced the same 2-to-1 ratio of independent to coherent errors seen in the mice.
The model also discovered that the limited connections between the networks tended to cause them to become synchronized, while the common noise caused them to move in separate directions. Hira provided an explanation of the interaction saying, “We found sparse inter-regional connectivity promotes synchronization between the two regions, whereas widespread fluctuations prevent complete synchronization, allowing each region to preserve its own temporal representation.” Neither force takes precedence; instead, a compromise is reached which allows communication between the regions.
The findings challenge the idea that brain regions rely on a single synchronized timing system. It indicates that the brain can adjust how different parts are coordinated, rather than just turning that coordination on or off.
What a Flexible Clock Could Mean for the Brain
Hira’s team believes that there are implications beyond simple timing circuits. “In the future, our results may contribute to a better understanding of cognition, neurological disorders involving disrupted inter-regional coordination, and the development of brain-inspired artificial intelligence and robotic control systems that combine stability with flexibility,” said Hira.
This last idea may prove most important in the years ahead. Engineers building AI and robotic systems face a similar challenge: how to let separate parts work on their own when needed, yet still come back into sync. The mouse brain shows that sparse connections and shared background fluctuations can achieve this balance. This could point to a design principle that even applies to systems with no biological components.
Austin Burgess is a writer and researcher with a background in sales, marketing, and data analytics. He holds an MBA, a Bachelor of Science in Business Administration, and a data analytics certification. His work focuses on breaking scientific developments, with an emphasis on emerging biology, cognitive neuroscience, and archaeological discoveries.
Authorities said that the ancient coin, which was made in Cyprus, is the first of its kind ever found in Israel, offering researchers a reliable historical source of information on maritime economic and trade activities in the region during this period.
2,500-Year-Old Coin Covered in Silver, Hinting at Origin
According to a statement emailed to The Debrief, one of the informal everyday duties of the deputy director of the Ashdod Beaches Department is helping locals and out-of-town visitors locate lost items. While these searches typically involve beachfront hunts for jewelry, car keys, and other modern-day items, a recent search led by the current office holder, Avi Chaprak, led to a historic discovery.
According to Chaprak, when he spotted the coin, he noticed it was completely different from other items he was typically tasked with tracking down. Since antiquities laws require such historic items to be handed over, the deputy director immediately passed the unusual-looking coin to the Israeli Antiquities Authority.
After the IAA’s coin department analyzed the coin, they informed Chaprak just how unusual the coin was. First, they explained, the coin was minted in the ancient Cypriot city of Salamis in the mid-5th century BCE. This date is significant since the coin was made during a time when the Persian Empire ruled the island.
The rare coin (Image Credit: Ashdod Municipality PR).
Second, the 11-gram standard coin, known at the time as a “Siglos,” was the first of its kind ever discovered on Israeli soil. The researchers said the first clue hinting at the coin’s origin was its material composition.
“At first glance, it looked to be made of silver,” explained Yanniv David Levy, Researcher and Curator in the Israel Antiquities Authority Coin Department, “but a closer examination showed it to actually be of metal that was only plated with silver; a known phenomenon in Cypriot silver coins from this period, given the shortage of silver on the island.”
A closer examination revealed that one side of the coin depicted a left-facing “recumbent” ram. The other side depicts a left-facing ram head placed within a sunken square frame. Next to the framed ram head is a vertical laurel branch with three symbols below it. The IAA statement said these symbols were “apparently of the Cypriot syllabic script.”
Ancient Finds with Exact Provenance Are Rare
When discussing the historical significance and scientific value of Deputy Director Chaprak’s fortuitous discovery, Levy highlighted two points. First, the researcher said that Persian Empire period coins of this size and value “are rare altogether in the archaeological record.”
“Usually, silver coins of this size were not preserved intact,” Levy explained. “Over time, they were cut into small pieces, for use as local trade currency.”
The research also notes that evidence for this use of ancient silver Cypriot coins is “mainly from inland states in Israel.” As a result, Levy said that discovering a complete Cypriot coin from the coastal area is “unusual on all accounts, and of special historical importance.”
Yanniv David Levy, a coin expert at the Israel Antiquities Authority, holds the rare coin (Image Credit: Shay Halevi, Israel Antiquities Authority).
Dr. Evangeline Markou, a Senior Researcher at the Institute of Historical Research, National Hellenic Research Foundation, and a respected authority on ancient Cypriot coinage, agreed. For example, the researcher said, although 2500-year-old Salamis coins were circulating throughout the eastern Mediterranean, “finds with an exact provenance are rarer.”
“Therefore, this coin potentially offers significant information about trade ties and movement between Cyprus and the Land of Israel during this period,” Dr. Markou explained.
“A Reliable Source of Information About Economic and Maritime Ties”
Along with recognition from the media and his colleagues, the IAA’s Coin Department awarded Chaprak with a certificate of appreciation for reporting the coin and delivering it to them. When asked about his role in the historic coin’s discovery, Chaprak said he felt privileged to do his part, while also noting how his own beliefs made the next steps after the discovery obvious.
Image Credit: Avi Chaprak, Deputy Director of the Ashdod Beaches Department, with the certificate of appreciation from the Israel Antiquities Authority.
“For me, it was clear that the coin belonged to our collective heritage, he said. “If through this act I contributed another small piece towards the research and history of the Land of Israel, then that is a great honor for me.”
Levy also highlighted the significance of Chaprak’s discovery and timely delivery of the 2500-year-old coin, noting how it helped preserve the object’s scientific and historical value.
“The circumstances of the discovery and the accurate reporting allow us researchers, not only to identify the coin itself, but also to use it as a reliable source of information about economic and maritime ties that existed in this region some 2500 years ago,” the IAA researcher concluded.
Christopher Plain is a Science Fiction and Fantasy novelist and has spent the last six years as Associate News Editor and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him at christopher@thedebrief.org
A remarkable collection of ancient inscriptions within a cave in eastern Spain is providing archaeologists with deep new insights into the early religious practices it once housed.
Among the new findings, researchers say the inscriptions are shedding new light on the prominent role women played in a subterranean cult, which centered on a previously unknown ancient goddess.
There, researchers recently documented at least 120 Latin inscriptions dating to the first and second centuries A.D.—a significant increase in the number of writings from this era known to exist at Cova Dones.
Previously, only around 15 of these inscriptions had been identified. The new findings elevate Cova Dones to what may be the Roman Empire’s largest known cave sanctuary containing Latin inscriptions.
One of the newly uncovered Latin inscriptions, enhanced with image overlay shown in lighter coloration (Image Credit: University of Alicante).
The Ritual Space of an Ancient Goddess is Revealed
Research at the cave was led by researchers from the University of Alicante and the University of Zaragoza, which revealed not only the inscriptions, but also a well-preserved ritual space located at a depth of close to 200 meters within the cave.
Among the discoveries researchers have made are a small collection of votive inscriptions, which are dedicated to what appears to be a goddess referred to simply as “Domina,” which means “The Lady.”
Three of those inscriptions also feature an unrecognized epithet—MALACI—which the researchers believe may describe some aspect of this mysterious goddess, possibly related in some way to the water that flows through the underground ritual space within the cave.
“Thanks to a set of five votive inscriptions, we know for certain that in Roman times a goddess, reverentially called Domina, ‘the Lady,’ was venerated in the cave,” says Silvia Alfayé, a professor of Ancient History at the University of Zaragoza.
Alfayé also says that the inscriptions further indicate the active role women played in the deity’s worship during this period.
Anatomy of an Ancient Roman Subterranean Cult
Within the newly-identified ritual space at Cova Dones, several individual female names were identified among the newly discovered inscriptions. This, according to Alfayé and her colleagues, reinforces the notion that the sanctuary had been a regular destination for women, rather than merely serving as an occasional site of pilgrimage.
Members of the research team during the documentation of the Latin inscriptions at Cova Dones (Image Credit: University of Alicante).
Specifically, the presence of the inscriptions all within a single chamber, which the research team has dubbed the “Roman Sanctuary,” places them alongside natural pools fed by underground water, which may have added to the allure of the subterranean ritual landscape the cave offered.
Strengthening that interpretation, the archaeologists also discovered spindle whorls, a variety of small tools used for spinning thread that were closely linked with women’s domestic and symbolic roles in the ancient Roman world, and beyond. Their presence near the inscriptions, the researchers believe, could imply links to ceremonies performed in the cave long ago, which may have incorporated textile-related offerings.
Ongoing Discoveries at Cova Dones
The recent findings at Cova Dones are only the latest offerings from the ancient site, which is already renowned for the ancient human presence it has preserved.
In 2023, The Debrief reported on discoveries within the cave that are now recognized as the largest known collection of surviving Paleolithic cave art in eastern Iberia. Such discoveries include more than 100 paintings and engravings dating back over 24,000 years.
The discovery of the Roman sanctuary occurred the following year, with the detection of Latin inscriptions and a coin featuring the Roman emperor Claudius, which archaeologists believe may have been left as a votive offering.
Then in 2025, archaeologists discovered more than 100 intentionally modified stalagmite formations, a unique category of archaeological evidence known as speleofacts. Altogether, such discoveries have helped cement Cova Dones as one of the most important sites in Europe to preserve evidence of prehistoric human modifications to an underground space.
One of a pair of bronze rings uncovered beneath the rock inscriptions at Cova Dones (Image Credit: University of Alicante).
Unraveling the Mysteries of a Subterranean World
Adding to the recent Roman inscription discoveries, Alfayé and her colleagues have also discovered artifacts that include bronze rings, a bracelet, ceramic vessels, faunal remains, and additional ritual objects—all of which provide additional clues that may help to reconstruct centuries of religious activity that once occurred deep within the cave.
Presently, many of the inscriptions await deciphering, and some large sections of the cave remain that have not yet been explored. With the promise of additional discoveries, archaeologists are confident that Cova Dones has only just begun to reveal its secrets.
In the coming years, new chapters in the story of this ancient subterranean landscape await discovery, exploration, and interpretation.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached atmicah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
Seen from space, the Danger Islands along Antarctica’s rocky coastline have a distinctive pink-orange coloration, with tiny trails of pink closer to its shorelines.
However, the unique colors of these islands aren’t attributable to minerals, colorful lichens, or other kinds of usual causes. According to NASA, the Danger Islands look the way they do because of their iconic residents.
Now, data about the influence these creatures have on their surrounding habitat his helping scientists monitor the health of an entire Antarctic ecosystem from space.
A Colorful Surprise Spotted from Space
According to a new study’s findings, the vast colonies of Adélie penguins on the Danger Islands are the culprit behind their coloration. More specifically, it is the guano these flightless birds produce that has permanently altered their coloration when seen from space, resulting in pink stains along the shoreline environments where these waddling creatures reside.
Surprisingly, the guano stains offer an effective means of tracking the diets of these birds, which can serve as a good proxy for the broader changes occurring in Antarctica’s marine environment.
NASA image based on Landsat satellite imagery by Michala Garrison, showing pink guano stains along the coastlines of Heroina and Beagle Island (Image Credit: USGS/NASA Earth Observatory/Michala Garrison).
Primarily, this is because these large penguin colonies can deposit enough guano that their presence is detectable in satellite imagery, as is revealed in Landsat satellite imagery collected since the mid 1980s. The distinctive pinkish hue observed on the Danger Islands today indicates a diet rich in krill, whereas eating more fish would produce very different color signatures—all of which can be detected through satellite observations.
Decades of Penguin Activity Revealed
For the new research, scientist Casey Youngflesh with the Department of Biological Sciences at Clemson University, along with her coauthors, analyzed more than three decades of Landsat satellite imagery collected from 1984 through 2013.
These observations, combined with samples collected from field studies involving penguin colonies, helped the researchers establish links between specific color patterns and the balance of krill and fish in the birds’ diets.
Among the team’s findings, the data revealed a very close relationship between penguin food sources and the extent of sea ice in the surrounding area, particularly during the breeding season of these shore-dwelling birds.
In the drone image above, a colony of penguins can be seen in two large circular groups along Antarctica’s coastline (Image Credit: Thomas Sayre-McCord/WHOI/MIT)
Colonies of penguins along the warmer Antarctic Peninsula and West Antarctica—locations where there is less sea ice—revealed a greater reliance on krill. By contrast, Eastern Antarctic penguins consumed more fish in areas where sea ice persisted for longer. This higher-quality food source is also linked to improved chick growth and a greater degree of overall population success in the long term.
“Sea ice is such a hugely important factor in the Antarctic marine environment,” said Youngflesh. “The structure of the region’s food web is changing in response.”
The Future of Antarctic Environments
Along with what the team’s findings reveal about the lives and sustenance patterns of penguins, they also bring to mind several questions about the future of their habitat.
Although sea ice in Antarctica was found to be primarily stable during the years Youngflesh and her team examined, since 2013 it has shrunken significantly, reaching record low levels. Further declines are expected in the decades ahead, signaling changes that could push Adélie penguins toward increasingly krill-dependent diets.
This could become complicated as commercial krill fishing has seen expansion in recent years, and recovering populations of whales and seals are also competing for the same food source.
Right now, researchers are working to produce new computer models based on data obtained from the Landsat 8 and Landsat 9 satellites, which will help them continue to observe penguin diets from orbit. This data provides an unusual—but also a remarkably effective—means of monitoring the changing health of Antarctica’s fragile ecosystem.
The findings were reported in a new study, “Space-based monitoring of penguin diet links sea ice, food webs, and population change,” which appeared in the journal Current Biology on July 20, 2026.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached atmicah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
The pyramids at Giza remain one of ancient Egypt’s most enduring historical legacies, and questions have long persisted about the exact methods used in their construction, as well as the origins of those architectural practices.
However, new evidence suggests that more than 5,000 years ago, ancient Egyptian builders had already begun experimenting with architectural techniques that foreshadowed those seen in the monumental constructions at Giza, which would eventually become the country’s most lasting and recognizable features.
According to archaeologists working at Jabal al-Tayr in Egypt’s Minya Governorate, a pair of Early Dynastic tombs display several “sophisticated” construction features at a site where burials span several periods of ancient Egyptian history.
An Ancient Burial Site is Revealed
Excavations undertaken by an Egyptian mission from the Supreme Council of Antiquities have revealed that the site, located on the Nile’s eastern bank, once served as a burial ground for several thousand years, from Egypt’s Predynastic period through the Late Period.
Some of the most significant discoveries at the site include the two tombs, whose architecture resembles the tomb of King Den at Abydos, who ruled during the country’s First Dynasty.
Within the first tomb, archaeologists uncovered intriguing evidence of early engineering, including walls that were built thicker at their bases and gradually became thinner near the top. Such designs appear to have offered enhanced structural stability, and similar principles would go on to be featured on a far greater scale in Egypt’s step pyramids and later in the larger “true” pyramids that followed.
An aerial view of the excavations at Jabal al-Tayr in Minya, Egypt (Image Credit: Egyptian Ministry of Tourism and Antiquities)
Surviving Stone Theft for Millennia
Unfortunately, some parts of the tomb sustained significant damage after its stone was quarried for reuse—a common practice throughout Egypt’s history—although the researchers say several important construction details managed to survive.
Among these, the team identified oxide lines on stone surfaces, which they linked to ancient cutting and extraction techniques, along with large wooden supports incorporated into the structure. Some of these supports extended the full length of the tomb’s walls, while in other cases, they reinforced only certain localized sections.
Within the second tomb, which was found immediately to the south, a very similar architectural plan was followed. Unlike the first tomb, there was little evidence of stone robbing here, leaving behind a structure in a very good state of preservation that allows archaeologists to examine its original construction in greater detail.
Although much of what archaeologists have located at the site is relevant to the Early Dynastic period, excavators also uncovered part of a Predynastic cemetery, where the remains of individuals were found under unusual conditions. These bodies appeared to have been buried in crouched positions and were originally wrapped in mats made from plant material.
Alongside the human remains, pottery vessels featuring blackened tops were dated to the Naqada II and Naqada III periods, which predated Egypt’s political unification.
Still other graves found nearby dated to the Late Period and included individual and collective burials, some containing the surviving remains of ancient wooden coffins.
The Changing Faces of Egypt’s Ancient Funerary Landscape
The discoveries offer archaeologists a vivid look at ancient Egyptian funerary practices and how they changed over time across the various phases of Egyptian civilization represented at the site, as well as the architectural techniques employed during these periods.
Arguably, among the most intriguing discoveries associated with the site are the structures themselves, whose similarities to royal architecture seen at locations like Abydos imply that sophisticated construction ideas had already begun to circulate between various regions of Egypt during some of the Egyptian state’s most formative centuries.
As excavations at Jabal al-Tayr continue, archaeologists may be able to glean further clues about the architectural experimentation that occurred there and how it might have helped shape the changing appearance of Egypt during the age of the pyramids. Ultimately, such discoveries may bring new light to longstanding questions about the origins of the monumental architecture at Giza—designs which have shown their resilience by enduring now for several millennia.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached at micah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
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