New research reveals how an unusual celestial object resembling a cosmic “bullseye” could offer clues to one of the most perplexing phenomena in our universe.
The research, undertaken by physicists Pierre Sikivie and Yuxin Zhao at the University of Florida, focuses on an astronomical feature quite unlike any other—the galaxy LEDA 1313424, whose concentric rings have garnered it the apt nickname of the “Bullseye galaxy.”
Based on Sikivie and Zhao’s recent research, detailed in a new paper that appeared in The Astrophysical Journal, quantum behavior related to long-mysterious dark matter may hold the key to the galaxy’s unusual appearance.
Unraveling a Bullseye Galaxy’s Circular Secrets
In the past, astronomers have attempted to explain LEDA 1313424’s unusual concentric appearance as the likely result of an ancient collision between two galaxies.
Not so, according to Sikivie and Zhao, who now take a vastly different approach by arguing that a better explanation may involve a Bose-Einstein condensate of axions, a variety of extremely light hypothetical particles.
A stunning Hubble Telescope view of the Bullseye galaxy (Image Credit: NASA, ESA, I. Pasha (Yale), P. van Dokkum (Yale)).
This concept has much deeper roots that go back close to a century ago, when the first galaxy featuring an unusual concentric ring was discovered. This example, dubbed the Cartwheel galaxy, was only the first in a succession of similar astronomical discoveries involving galaxies with “ringed” appearances that incorporate as many as three annular features.
Unraveling an Annular Enigma
Explaining why these galaxies look this way has remained elusive. One theory proposed by astronomers, as noted earlier, involves impacts between two galaxies, which could create waves of density whose ripples become evident in ring-like structures surrounding the resulting galaxies.
However, a discovery in 2025 by Imad Pasha, a Yale University astronomer, and his colleagues presented an even stranger development in this ongoing concentric saga: the discovery of a galaxy that possesses not three rings, but nine of them. With its discovery, this remarkable celestial object’s unusual appearance garnered the nickname now familiar to us: “The Bullseye galaxy.”
Artist’s concept detailing the annular features encircling LEDA 1313424 (Image Credit: NASA, ESA, Ralf Crawford (STScI))
One theory that astronomers believed may account for the galaxy’s nine concentric structures had been a hypothetical impact—and a very energetic one—that occurred about 56 million years ago. However, while investigating this possibility, Sikivie and Zhao say a problem emerged: this would mean that the outermost ring in the galaxy would have had to travel at a speed of 758 miles per second as it blasted outward from the galaxy’s center.
This speed, they say, is impossible to reconcile with what astronomers can already discern about the nature of the supposed collusion, as well as the well-characterized behavior of galactic material observed in other regions of the cosmos.
An Alternative Approach
In an effort to get to the bottom of the mystery behind this unique galaxy, Sikivie and Zhao have put forward an alternative idea: that the rings in the Bullseye galaxy might instead be a byproduct of dark matter’s mysterious properties.
According to astronomers, dark matter is believed to be a nonluminous material that populates our universe, contributing around 85% of its total mass. Despite its ubiquity, direct detections that could confirm its existence have remained elusive.
However, there are some intriguing cosmic phenomena that astronomers are aware of that are very good candidates for being indirect evidence of this mysterious material. These observations include gravitational motion that occurs in galaxies, whereby the accumulation of dark matter is believed to manifest in the appearance of spherical halos encircling them.
In the past, Sikivie has explored this possibility, and whether current prevailing theories about dark matter, such as the idea that hypothetical particles known as axions, may offer the best interpretation of the physical reality behind dark matter.
If dark matter is indeed related to axions, it would also be required to obey what astrophysicists call conservation of angular momentum. According to Sikivie, when axions and galaxies interact, a phenomenon should emerge where portions of dark matter halos closest to the center would become oriented in structural forms known as “caustic rings.”
“We had earlier proposed that disk galaxies have caustic rings of dark matter with a pattern of ring radii, very similar to the pattern of ring radii observed in LEDA 1313424,” Sikivie recently said.
With this idea in mind, Sikivie and Lhao then turned their attention to the mysterious bullseye of LEDA 1313424 and “fitted the observed ring radii to the pattern of ring radii in the caustic ring interpretation,” from which they discerned that “LEDA’s rings are the imprint of caustic rings of dark matter on the baryonic matter in LEDA’s disk.”
Strange Quantum Behaviors
A further aspect of the researchers’ theory involves the quantum behavior that axions are expected to engage in.
Under extremely cold conditions, these hypothetical dark matter particles could collectively occupy the same quantum state, forming what is known as a Bose-Einstein condensate—a strange state of matter in which quantum effects become visible on macroscopic scales.
According to the team, such a condensate could interact with ordinary matter in ways that match astronomical observations. If the duo is correct, this could imply that ring-shaped galaxies such as LEDA may not result from galactic collisions at all—instead, these unique cosmic structures might be evidence of dark matter axions that have undergone Bose-Einstein condensation.
Presently, much like dark matter, axions have remained hypothetical and frustratingly difficult to detect. Of course, given their elusiveness, this also makes them a very good candidate in terms of helping scientists close in on the dark matter mystery, and new models are helping to provide potentially compelling new resolutions for such problems.
For now, mysterious ringed galaxies remain mysterious. However, as the work of researchers like Sikivie and Lhao progresses, one of astronomy’s more unusual recent discoveries is gradually coming into focus, while providing fresh insight into the intriguing quantum nature of dark matter.
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.
Researchers at Texas A&M University report the successful regrowth of skeletal and connective tissues, in what they call a “critical step” toward one day enabling major tissue regeneration in humans.
Throughout time, the regenerative capabilities that, in some cases, can even restore entire lost limbs, have been viewed as an almost miraculous ability that only certain animals, such as salamanders, some reptiles, and other creatures, possess.
However, regenerative science is now unlocking the secrets of this capability, meaning that one day, even humans might be able to tap into one of nature’s most mysterious superpowers.
Current state-of-the-art research at the Texas A&M College of Veterinary Medicine and Biomedical Sciences is revealing a remarkable possibility: that regenerative abilities may not be absent in mammals after all—they may simply be dormant.
This remarkable possibility was detailed in a recent study published in Nature Communications, which details research led by Dr. Ken Muneoka with the school’s Department of Veterinary Physiology & Pharmacology (VTPP), who says he has devoted most of his career to unraveling this possibility.
Now, Muneoka and his team report a two-step treatment they developed, which successfully triggered the regeneration of bone, joint structures, ligaments, and other tissues following amputation—a significant advancement toward unlocking more powerful regenerative capabilities in humans.
“Why some animals can regenerate and others, particularly humans, can’t is a big question that has been asked since Aristotle,” Muneoka says.
Fibrolasts to the Fore
In their research, the team worked with cells that drive the healing processes and scar formation after wounds occur, which are known as fibroblasts.
In species like salamanders, similar cells go to work when injury or limb loss occurs, which begin to form into structures biologists call blastemas. These formative materials are the primary drivers behind the regrowth of tissues in such creatures.
However, unlike salamanders, mammalian cells need a bit more encouragement before they will begin to follow such regenerative pathways.
To help with this process, Muneoka and his team developed a new sequential treatment based on a pair of primary growth factors. Applying fibroblast growth factor 2 (FGF2) in an area where a wound had already healed stimulated the formation of blastema-like formations in mammal cells. Then, after several days, a bone morphogenetic protein 2 (BMP2) was applied, which similarly prompted bone cells to begin rebuilding their lost tissues.
“You first shift the cells away from scarring, and then you provide the signals that tell them what to build,” Muneoka said of this two-step process.
While the regenerated structures were not perfect replicas of the original anatomy, what Muneoka and his team achieved is still nothing short of remarkable: the team says they were able to successfully restore all major components that are typically lost when amputation occurs, including bone, tendons, ligaments, and joints.
“The Capacity is Not Absent”
Also of key significance is the fact that the team’s findings suggest that such hidden powers of regeneration might be accessible without the need for introducing external stem cells.
“You don’t have to actually get stem cells and put them back in,” Muneoka said. “They’re already there—you just need to learn how to get them to behave the way you want.”
Dr. Larry Suva, the recent study’s co-author, said the results challenge long-held assumptions about the limits of mammalian healing.
“The cells that we thought to be unprogrammable, in fact are,” Suva said. “The capacity is not absent—it’s just obscured.”
The Future of Regenerative Science
The team’s work is breaking new ground in the promising field of regenerative science, although what they have achieved so far is still in the earliest stages of what they believe may ultimately be possible.
Soon, such approaches may yield applications that could help significantly reduce scarring and may greatly help with tissue repair. Also, since BMP2 has already undergone the approval process for medical uses, and FGF2 is undergoing evaluation in clinical trials, Muneoka, Suva, and the Texas A&M team believe the path toward future medical applications may be more accessible than entirely new therapies.
“Regenerative failure in mammals can be rescued,” Muneoka said.
“Now we have a model to begin figuring out how,” he added.
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.
Physicists have revealed that the unusual decay of an “exotic” subatomic particle could offer new clues to its mysterious structure.
The discovery, reported by a team of physicists in a study published in Physical Review Letters, argues that it provides the first “crucial discrimination” between current theoretical models of a variety of subatomic particles known as the Ds(2317) meson.
Exotic Subatomic Mysteries
The new research has its beginnings more than two decades ago, with the initial detection of an unusual particle known as the Ds(2317) meson. Part of what makes this particle unique is the fact that it possesses one charm quark (or “c quark,” a kind of elementary particle) and one strange antiquark—the third lightest of all the known quarks.
It was deemed a major discovery at the time, and for good reason: it seemed to point at a significant discrepancy between the particle’s measured mass of 2.317 GeV/c2, and predictions based on estimates that placed it significantly higher, at around 2.4 GeV/c2.
Now, in a new study by researchers with the Belle and Belle II Collaboration, observations of previously undetected behaviors that include never-before-seen light-emissions during the particle’s decay have been described for the first time.
Based on their analysis, the team believes their new findings mark not only a significant first in the study of these particles, but that they may also help researchers solve the longstanding mystery involving apparent discrepancies between the observed and expected mass values for the Ds(2317) meson.
The findings, the team says, could also provide physicists with deeper insights into the fundamental forces that currently bind matter.
Unraveling a Baffling Discrepancy
The team approached the problem by first proposing a range of different models that could potentially describe the internal structure of the Ds(2317) meson. Of key importance was the fact that each of the different models allows researchers to predict a specific range of potential values for the particle’s decay.
This was achieved based on the probability that the Ds(2317 meson will decay by emitting a gamma ray, which was then divided by an entirely separate probability: that the particle would emit a pion—a type of meson with a mass roughly 270 times that of an electron—rather than a gamma ray.
Based on these two possibilities, the team determined that measurements indicating a ratio of greater than 8.1% would point to the likelihood that the meson represents a compact state involving quark-antiquark models.
However, if the calculated value turned out to be lower—specifically in the range of between 0.5% and 4.25%—that would instead favor models that describe the particle as functioning closer to being a sort of molecule-like state of two separate mesons.
Well Above Standard Deviations
With such values in mind, the team then went to work to determine which was more likely with help from data collected by the Japanese KEKB and SuperKEKB electron–positron colliders.
Using this information, the particle’s gamma-emitting decay was successfully detected, revealing a statistical significance above ten standard deviations. Next, the Belle and Belle II Collaboration conducted measurements that showed the decay ratio between photons and pions was close to 7%, placing the determined value smaller than the majority of quark-antiquark models, and at a greater value than those in the molecular models.
“This result provides crucial discrimination between theoretical models of the Ds(2317) structure,” the team writes.
Going forward, the researchers believe additional insights that may help to conclusively reveal the mysterious Ds(2317) meson’s structure may be achievable through more complete measurements of the particle’s decay rate.
The recent paper, “Observation of the Radiative Decay 𝐷*𝑠0(2317)+→𝐷*𝑠+𝛾,” appeared in Physical Review Letters.
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.
It’s not the kind of thing astronomers expect to see while observing the powerful effects of a distant supermassive black hole: an unprecedented UFO sighting.
However, that’s precisely what one group of scientists now reports in a preprint paper, who detail the successful detection of one of the strongest UFOs—a black hole phenomenon otherwise known as “ultra-fast outflows”—that astronomers may have ever seen.
The landmark detection was made possible with the XMM-Newton space observatory and NuSTAR X-ray telescope, which allowed the researchers behind the discovery to observe a luminous quasar with origins that date back to “cosmic noon,” revealing a pair of outflow wind components being blasted from the black hole in question.
These winds become known as ultra-fast outflows (UFOs) when their strength propels them to greater than ten percent of light speed, and astronomers currently believe they are an important part of what helps black holes regulate their growth, which may also hold for their host galaxies.
One way this occurs is that UFOs help to heat galactic gases that give rise to star formation, a quenching process that most astronomers believe occurred during a period called “cosmic noon,” which occurred between 1.6 and 3.5 billion years after the birth of the universe.
Cosmic Fingerprints of Powerful UFOs
Astronomers can detect ultra-fast outflows based on the “dips” they create in their powerful gusts, which are caused by ionized iron present in their outflow gases. These gases also absorb X-rays along their path away from their black hole originators, which leave “fingerprints” in the form of absorption features that are detectable using X-ray telescopes.
Significantly, these “dips” manifest as a blueshift since they are shifted to higher energies as they move at such high speeds (again, roughly 10% of the speed of light). From the blueshifted energy signatures they comprise, astronomers can determine not only the presence of UFOs, but also the wind speed of their gusty outflows.
In the past, most detections of these high-powered cosmic phenomena have relied on gravitationally lensed quasars. These celestial objects occur when a galaxy or similar feature closer to Earth appears in front of them, magnifying the quasar’s light and significantly brightening its luminosity from our Earthly perspective.
However, lensing of this variety can also present problems, and so astronomers led by Giorgio Lanzuisi of INAF Bologna designed a special system to target more than a dozen hyper-luminous quasars at cosmic noon, as a means of getting a better feel for the dynamics of non-lensed quasars.
“WISSHFUL” Thinking
WISSHFUL is an XMM-Newton multi-year heritage program that Lanzuisi and his colleagues designed for this purpose, whose initial target became a quasar designated WISSH13, whose redshift at 3.294 marks the object’s existence as it appeared approximately 2 billion years after the Big Bang.
WISH13’s black hole also weighs in at close to 2 billion times that of our Sun, which causes it to shine far brighter than normally expected for an object of its estimated mass.
Their work began in the autumn of 2024 by combining observations from XMM-Newton and NuSTAR initially obtained in 2017. From these X-ray images of WISSH12, a pair of distinctive absorption features became evident, which the team determined to have been generated by two separate sources from within the same ultra-fast outflow.
These components were found to travel at different speeds: one moving at close to 30% of the speed of light, while the other at only about 10% of light speed. The slower of these two appears to have been an enduring component of the UFO, while the faster one showed signatures that indicated a more recent appearance. This could mean that it emanates from events that are shorter in duration.
By matching theoretical predictions of a layered wind structure surrounding the black hole, the researchers say their observations align with models that indicate a fast-moving inner “spine” launched from the accretion disk’s innermost regions. Meanwhile, a slower outer “sheath” is also believed to emanate farther from the black hole. The combined outflow components produce an estimated 21 to 24 solar masses of material annually.
The Most Massive UFO Ever Observed?
Such figures, the team says, represent what is believed to be among the most massive and energetic ultrafast outflows ever observed, a discovery which also marks the highest-redshift ultrafast outflow yet detected in a non-lensed quasar.
Despite their remarkable energetic output, the team says these outflow winds seem to conform to the same essential relationships observed in active galaxies much closer to Earth, suggesting that the processes driving these outflows have remained remarkably consistent across cosmic time.
Going forward, the team says they hope to make additional observations of these powerful cosmic phenomena with help from the new Athena X-ray mission, which they say could help uncover similar winds in even more distant quasars.
The team’s discoveries were detailed in a recent paper, “The WISSHFUL program: the highest redshift UFO discovered in a non-lensed QSO,” which appeared at the preprint arXiv.org server.
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.
Welcome to this week’s installment of The Intelligence Brief… in a recent sworn statement, it was revealed that the Pentagon has reportedly leveraged Elon Musk’s xAI to assist in the launch of as many as 2,000 munitions in the recent U.S. war with Iran. In our coverage, we’ll be looking at 1) how the recent revelations were brought to light in a lawsuit focused on possible violations of the Clean Air Act, 2) how a “frontier” AI chatbot became key part of the Pentagon’s military efforts, and 3) why lawmakers are sounding alarms over the potential misuse of AI systems, and the need for ensuring their safe use while restricting major decisions to human operators.
Quote of the Week
“We must act now—not to stifle technological progress, but to establish clear rules of the road that keep humans in charge and keep AI’s use in warfare smart and safe.”
– U.S. Senator Kirsten Gillibrand
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Musk’s AI Chatbot Helped U.S. Forces Fire Missiles
This week, as an initial deal aiming to end the U.S. war with Iran comes to fruition, it was revealed that thousands of missiles launched by the U.S. were fired by Elon Musk’s Grok chatbot.
The revelation emerged as part of a sworn statement pushing to protect the military’s use of Musk’s AI systems that could be impacted by a lawsuit, which alleges his xAI data centers are contributing to illegal pollution in black communities.
The statement, made by Cameron Stanley, the Pentagon’s chief digital and artificial intelligence officer, states that Musk’s AI chatbot helped to facilitate the deployment of “over 2,000 munitions to 2,000 distinct targets within 96 hours during Operation Epic Fury,” which Stanley called “a testament to the greatly increased operational efficiency made possible by the Grok Gov Model.”
A “Frontier” AI Chatbot
In Stanley’s sworn statement this week, the Pentagon official tasked with overseeing the Department of War’s use of AI wrote that xAI’s Grok is one of just four proprietary AI models “capable of supporting national security applications.”
Stanley wrote that xAI also “remains one of just three enterprise providers equipped to sustain mission-critical operations across Secret and Top-Secret classified networks for the foreseeable future due to the enormous resources required for initial certification.”
“DoW currently relies on derivatives of xAl’s commercial offerings known as the Grok Gov Model,” according to Stanley, who goes on to note in his statement that the AI chatbot has been deployed in systems that include Maven Smart Systems, where it assists in supporting “vital national security missions, including targeting, intelligence, readiness, and recruitment,” and also aids in a range of other military tasks.
“The Grok Gov Model offers features unique to xAI that are found in no other frontier Al model,” Stanley wrote. As an illustration of its capability, Stanley then made the chilling revelation of just how involved in military activities the xAI chatbot has recently become.
Grok Goes to War
“To further illustrate the uses of the Grok Gov Model within DoW, MSS frontier workflows enabled U.S. forces to deploy over 2,000 munitions to 2,000 distinct targets within 96 hours during Operation Epic Fury, a testament to the greatly increased operational efficiency made possible by the Grok Gov Model,” Stanley wrote in his testimony.
As reported by The Independent, the sworn statement provided by Stanley appears to represent the first confirmation by an official within the Trump Administration that Elon Musk’s AI is being used to control U.S. weapons used against Iran.
Since the conflict began in February, the Trump administration has faced scrutiny over U.S.-led attacks that have resulted in civilian deaths, with mounting questions over the military’s use of AI during the conflict.
In an analysis by the Lieber Institute at West Point, Jessica Dorsey and Luke Moffett noted that AI systems “are frequently framed as ushering in an era of unprecedented precision and efficiency in warfare,” but in reality, issues that include recent figures involving as many as 1,700 civilian deaths as of May 2026 “calls that narrative into serious question.”
“CENTCOM claimed it was generating 1,000 targets per hour,” Moffett and Dorsey wrote, adding that while “such capabilities are often framed as enhancing precision… they also introduce new layers of abstraction between decision-makers and the consequences of their actions.”
Pending Court Rulings Could Impact the Pentagon’s AI Use
The U.S. Department of Justice has argued that a pending court ruling could significantly impact the Pentagon’s use of AI if it is prevented from deploying xAI across its systems.
In an effort to prevent such setbacks, the Trump administration has requested that a lawsuit launched by the NAACP be dismissed by a Mississippi-based federal judge. The lawsuit claims that Musk’s xAI Colossus 2 data center, which relies on several dozen gas-powered turbines, is operating in violation of the Clean Air Act. Presently, the turbines are being operated without permits, the lawsuit asserts.
In his sworn statement this week, Stanley called Musk’s xAI systems a “long-term strategic tool vital to maintaining our technological advantage against adversaries.”
However, opponents of such measures in Washington argue that new regulations must help to ensure that crucial military decisions—especially those which impact human lives—must also be made by humans.
“The most critical decisions affecting our national security and the lives of our service members must always be made by human beings, not unaccountable machines,” wrote U.S. Senator Kirsten Gillibrand (D, NY) in a statement earlier in June.
Gillibrand also recently introduced a bill that aims to restrict military decisions that could potentially impact human lives to human operators, and to implement a ban on AI in governing the use of nuclear weapons, as well as autonomous weapons capabilities and domestic surveillance.
In her statement this month, Gillibrand argued that the Pentagon “is moving toward deploying incredibly powerful AI technology without commonsense guardrails in place, which could have catastrophic consequences that make all of us less safe.”
“We must act now—not to stifle technological progress, but to establish clear rules of the road that keep humans in charge and keep AI’s use in warfare smart and safe,” Gillibrand added.
An experimental aircraft just achieved a “major milestone” that NASA officials say brings the future of quiet supersonic flight closer to being a reality.
The test flights involved the American space agency’s secretive X-59 aircraft, which reportedly reached speeds of 1.4 Mach—roughly 924 miles per hour—during a flight last Friday.
Reaching an altitude of 55,000 feet, the experimental aircraft’s speed and height during last week’s test flight met the conditions the agency says are required for future flights aiming to achieve supersonic flight without the noisy booms it usually generates.
In a statement, NASA said the aircraft’s tests are far from complete, although Friday’s test marks a significant milestone toward reaching its current mission goals.
“The X-59 still has months of performance testing ahead, but after those are complete, NASA’s Quesst mission will fly the aircraft over several U.S. communities to collect data on public perception of the quiet sonic thump it will make at supersonic speeds,” NASA’s statement on Friday read. “Those community overflights will include flights at Mach 1.4 and 55,000 feet.”
Another Milestone for NASA’s X-59
Last week’s test occurred within days of an earlier takeoff that sent the X-59 on its first successful supersonic flight, where the plane reached a top speed of Mach 1.1.
The earlier test also marked a leap forward for the Quesst mission, which is in the process of completing several crucial steps that are expanding the X-59’s capabilities.
Deployed for test flights at various speeds and at different altitudes, flight engineers are currently gauging the aircraft’s flight envelope by having it perform in a range of different flight conditions.
During its current test flights, NASA said the supersonic aircraft was accompanied by a NASA F-15 research aircraft, which still produces a sonic boom when it flies, unlike the X-59. NASA engineers plan to mount a shock-sensing probe on the accompanying aircraft during future flights, which the agency says will collect vital information about the shock waves the experimental aircraft produces.
The resulting experiments will help engineers measure the exact capabilities of the new aircraft and its supersonic performance.
Additional Prep for NASA’s Quesst Mission
Although designed to function as a “quiet” supersonic aircraft, the X-59 still produces audible signatures, which NASA likens more to being a soft “thump” than a sonic boom.
During its final testing phases, the X-59’s supersonic acoustic signature will also be measured.
If all goes according to plan, the supersonic aircraft will complete its full round of testing in the months ahead, marking a successful series of demonstrations that it meets all the requirements for quiet flight under a range of different altitudes and other flight conditions.
Ultimately, the technologies being innovated by this experimental plane will help to enable the first supersonic flight over land in decades, paving the way toward a new future of commercial flight faster than the speed of sound.
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.
Among the range of proposed alternatives, one potential candidate involves what are called solar light sails, a theoretical propulsion system that relies on pressure generated from solar radiation against a large surface to move a spacecraft.
Such concepts have been proposed since the 1980s, some of which combine the idea of using sunlight as a power source with the implementation of lasers, which could propel such futuristic starships to speeds our best current technologies cannot attain.
However, not all spacecraft propulsion experts are necessarily sold on the idea of solar light sails just yet. According to new findings detailed in a paper by researchers Jiaze Li and Chao Shen of the Harbin Institute of Technology in China, this novel form of propulsion may have a few hurdles to cross before it can attain the near-light-speeds many experts had hoped for.
A Tale of Three Forces
According to Shen and Li’s recent research, a key problem arises once a solar light sail spacecraft begins nearing the speed of light: drag forces resulting from the very source of energy used to propel the devices could place significant limitations on their maximum attainable speeds.
A combination of different forces can be expected to occur as sunlight strikes a light sail, the authors say, which includes incident light, specular reflection, and diffuse scattering.
Incident light describes the physical momentum generated by light energy in the form of photons as they strike the sail, whereas specular reflection describes the momentum produced as photons reflect off the sail. Finally, diffuse scattering is a separate form of momentum generated by photons, which, rather than bouncing away upon impact, is actually absorbed by the sail, the energy from which is thereafter released in random directions.
New Limitations on Solar Light Sails
Based on these primary forces, the authors identify that once a light sail begins reaching relativistic speeds, it also becomes subjected to intense Doppler effect—the phenomenon that occurs as changes in the frequency of waves result as their source and an object or observer’s distance changes in relation to it.
In the case of solar light sails, the more the frequency of light waves striking the sail decreases, the less the amount of thrust generated by the three forces the paper identifies. In simpler terms, the faster a solar light sail spacecraft attempts to travel, the harder it becomes for it to accelerate.
Relativistic Light Aberration
At approximately 75% of the speed of light, the researchers say that an additional hindrance emerges, as what physicists call relativistic light aberration takes over. This phenomenon, first described by Einstein more than a century ago, involves relativistic corrections of light sources for observers who move at velocities approaching light speed.
In the case of our prospective future solar light sailors, this would mean that the weakest of the three forces impacting the sail (diffuse scattering) would begin to impose an active drag once the sail reaches approximately three-quarters of light speed. While the overall force of lasers helping to propel the light sail would remain positive at this stage in the system’s acceleration, the authors note an inevitable decline in efficiency.
The authors do concede that while their paper examines the radiative dynamics of solar light sail propulsion, it does not account for other factors that may include drag resulting from encounters with materials like gases, dust, or other physical sources (i.e., non-radiative sources), which could also impact overall speeds.
Additional factors worthy of consideration, but which the authors do not directly address in their paper, include the melting point of any materials used for solar light sail propulsion, which could be heated to extreme temperatures due to combined exposure to solar radiation, laser energy, and friction from movement.
Fundamentally, the team reports that their paper “provides a rigorous and in-depth theoretical foundation for lightsail dynamics,” which illustrates that while this future propulsion concept has its merits, we may still be far from seeing its realization for practical space travel.
By outlining the factors that contribute to constraints on light sail propulsion, Li and Shen aim to improve our overall understanding of this prospective future technology, thereby helping engineers to realize its potential for use in space exploration at some point in the future.
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.
A burial site uncovered by archaeologists in southern Siberia has revealed a series of unusual discoveries, which include ritually broken artifacts surrounding human and horse remains.
The burial site was uncovered in the Sayan Mountains and was discovered during a survey in advance of railway construction planned for the area. Archaeologists believe that the grave dates to the tenth century.
Originally uncovered in 2014, excavations at the site of the unusual grave and several others found nearby have been ongoing, revealing discoveries that researchers say are unusual for the period and location.
“It is quite clear that this is far from an ordinary burial,” according to Andrey Poliakov, a researcher with the Russian Academy of Sciences and one of the co-authors of a new study detailing the findings, which appeared in Bulletin of Novosibirsk State University, Series: History, Philology.
Curious Discoveries in a Siberian Grave
Among the unusual discoveries in the Siberian grave were human remains—those belonging to a woman, as well as a newborn child—and animal remains belonging to a horse, including the creature’s skull, skin, and limbs, and a spine that belonged to a sheep.
The woman’s remains were also accompanied by several artifacts, which included bronze earrings, a spindle whorl crafted from stone, and an iron knife. Also associated with the woman’s remains was a mirror, which archaeologists believe may have been intentionally broken for ritual purposes—a practice maintained by many ancient cultures throughout the world.
The woman’s remains at the burial site in the Sayan Mountains revealed a range of artifacts, many of which were dated to earlier times, suggestive of heirlooms that may represent an “elite” burial (Image Credit: Press Service of the Institute of the History of Material Culture of the Russian Academy of Sciences)
Eastern Connections
Also of interest was the design of the mirror, which features carvings of a vine that winds along the artifact and clusters of grapes. The research team believes this could indicate that this artifact, and possibly some of the others found in the grave, may have originated from China.
Additionally, the researchers report that items associated with the remains of the horse contained within the burial site are associated with older periods, which would have made them antiques at the time they were included within the grave. Another example of artifacts with possible eastern origins includes a stirrup, which features decorations that bear resemblance to ancient art found in China and India.
Such stirrups were often employed by nomads who once dwelt on the Eurasian Steppe, and featured on the left side of their saddles—a position which archaeologists also believe may have held ritual significance.
An Elite Burial from the 10th Century
According to the researchers in their study, “The entire set of items constitutes a complete set of riding horse equipment,” which they say has “an archaic appearance and could be preserved for a long time as ‘family heirlooms’.”
The researchers add that such items were particularly popular in ancient nomadic society along the Eurasian Steppe and were viewed “as an indicator of social prestige” during the 8th and 9th centuries.
The unusual collection of artifacts within the grave was considered a rare find for this region, although further interpretation about the remains of the woman and the infant, which may had been her child, may be required.
The paper, “Riding Horse Equipment from a Medieval Burial on the Idzhim River in the Usinskaya Basin,” by Andrey Poliakov and colleagues, appeared in Bulletin of Novosibirsk State University, Series: History, Philology.
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.
A curiosity that had been locked away in a museum’s archives for more than 200 years is now revealing clues to a longstanding Viking mystery.
Although much is known about these seafaring Scandinavians who dispersed throughout Europe between the 8th and 11th centuries, a few fundamental questions remain unanswered.
Among them is the question of their grooming and style: how did this historic group of pirates and traders wear their hair?
Now, a discovery long hidden within the archives of Denmark’s National Museum could finally provide clues by offering historians a rare glimpse at a Viking “portrait,” revealing a surprisingly well-kept individual.
A Forgotten Discovery Resurfaces
The rediscovery of this curious artifact, known as the Flygstad Figurine, was made by Peter Pentz, the curator of Denmark’s National Museum. While combing through some of the museum’s archives, he located a small figurine depicting a noticeably well-groomed man.
It soon dawned on him that the one-inch-tall object was most likely a gaming piece, which would have been used by Vikings in the tenth century. However, this recognition of the artifact’s purpose only deepened its mystery, since the appearance of the individual it represented seemed distinctively unlike our general conception of how Vikings looked.
“When I came across him in one of our storage rooms a few years ago, I was really surprised,” Pentz recently said of the discovery. “He just sat there, looking directly at me, and I had never before seen such a Viking, not in the many years I’ve been at the museum.”
The piece consists of the tiny head and torso of a bearded man, whose facial hair appears to be braided. Along the sides of his face are sideburns, as well as a moustache with curled ends; the man’s hair is evenly parted, with wavy strands that descend the sides of the head around his prominently protruding ears.
However, the deeper history of this unusual artifact reveals an even more intriguing story, along with new perspectives on the way these ancient Scandinavians looked and presented themselves.
Discoveries in a Viking Warrior’s Grave
The artifact’s history can be traced back to discoveries made before the nineteenth century, when excavations in the late 1700s were underway at a burial site in southeastern Norway near the appropriately named locale of Viken.
There, among the items entombed within a Viking warrior horse grave near Norway’s famous Oslofjord, had been the tiny and unusually well-trimmed figurine. Placed in storage for safekeeping, the small artifact was given the label of item “No. 589,” becoming one of the first few hundred items ever housed within the museum.
Ultimately, the tiny item was forgotten, and it remained hidden in the museum’s collection for more than two centuries. Now, out of the more than two million artifacts that have accumulated in the facility over the years, this tiny homage to Viking style, grooming, and gaming has finally resurfaced.
A Tenth-Century Gaming Piece
Pentz and his colleagues say the item was probably used as part of the Viking-era board game known as Hnefatafl, part of a broader family of amusements known as Tafl games that featured checkered boards similar to modern chessboards.
Beyond merely being an implement of tenth-century gaming, the specific features on the tiny artifact could reveal much more about Viking men from the period in question.
“We haven’t had any detailed knowledge about Viking hairstyles, but here, we get all the details—even the little curl above the ear is marked,” Pentz recently said.
“This is the first time we see a figure of a male Viking with his hair visible from all angles,” he added.
The uniqueness of the small character could suggest that he was more than just your average Viking—the elegance of his visage may even suggest he was a member of royalty, with possible identifications including the Viking king Harald I, who reigned during the late 900s C.E.
One thing is clear, however: the Flygstad Figurine is now causing scholars like Pentz to fundamentally rethink past ideas about how Vikings looked.
“If you think of Vikings as savage or wild, this figure is proving the opposite,” says Pentz.
“He is very well-groomed,” Pentz added.
The rediscovery of the Flygstad Figurine was recently detailed in a study, titled, “Understanding the Flygstad (Fløgstad) Figurine: Gaming Pieces, Kings, Gender and Fertility Rites,” which appeared in Medieval Archaeology.
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.
Physicists report the discovery of new evidence for a mysterious quantum state in an unusual class of materials, in findings that could illuminate a long-running debate over how these systems transition into superconductivity.
In physics, symmetry breaking refers to processes in which a symmetric state collapses from its initial state of disorder into a more ordered one, albeit now possessing less symmetry.
The new research findings reveal evidence that time-reversal symmetry, a fundamental kind of symmetry in nature, appears to be broken at temperatures significantly higher than previously recognized.
The research was detailed in a recent study published in Nature Physics.
Mysterious Kagome Metals
In their study, an international team of researchers led by a team at the Korea Advanced Institute of Science and Technology focused on what are known as kagome metals—a variety of ferromagnetic quantum materials possessing unique qualities.
For their study, the researchers used a specific kagome metal called Cesium Vanadium Antimonide (CsV₃Sb₅), a novel material first discovered in 2021 by researchers at UC Santa Barbara’s NSF Quantum Foundry.
The researchers found that during experiments with the material, which is recognized as a candidate superconductor, CsV₃Sb₅ showed indications that time-reversal symmetry was broken at temperatures significantly higher than previously recognized.
This is significant because it is suggestive of an elusive phenomenon physicists call loop-current order, which describes a state in which the circulation of electrons throughout a material occurs in persistent microscopic loops.
A Signal Emerges
Using an advanced photoemission technique, the team was able to uncover subtle differences in the way electrons respond to circularly polarized light, which is light that is produced using an electric field vector that rotates in a circle as the light wave propagates, equaling one complete rotation for each wavelength.
Based on the team’s measurements, a distinctive signal emerged, which they say is consistent with a time-reversal symmetry-breaking state, meaning that their observations provide what may be the best experimental evidence to-date for an exotic quantum state of matter known as loop-current order, wherein electrons spontaneously assume microscopic wave-like formations.
Exotic States and High-Temperature Superconductivity
One reason the team’s findings are so significant is that their results offer some clarity for the otherwise complex sequence of phase transitions that are known to occur within CsV₃Sb₅.
Based on their research, the team now believes loop-current order manifests as the temperature begins to decrease, which is then followed by a periodic rearrangement of electrons known as a charge density wave. Finally, superconductivity then follows, accompanied by the absence of electrical resistance altogether.
Fundamentally, the team’s work could offer new insights into the behavior and characteristics of strongly correlated quantum materials, which could hold promise for future studies involving the mechanisms that produce exotic states of matter.
“These insights deepen our understanding of the phase landscape in kagome metals and highlight connections with a correlated system exhibiting analogous transition hierarchy,” the team reports.
In the future, such studies may also help scientists finally attain the long-sought goal of high-temperature superconductivity, whereby materials capable of conducting electricity with zero resistance, and at temperatures above 30 K (-243°C), helping to reduce the current expenses associated with cooling systems required for superconducting, and ultimately helping to bring these high-power engineering technologies into commercial viability.
The team’s recent study, “Evidence of time-reversal symmetry breaking above the charge density wave order in a kagome metal,” was published in Nature Physics.
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.
Fortunately, a team of physicists at Virginia Tech has a plan for preventing that before it happens, which utilizes an existing variety of particle detection to spot and track down such illicit nuclear development before it becomes a major concern.
The team, led by Virginia Tech researcher Patrick Huber, says that antineutrino detectors could hold the key to preventing misuse of nuclear fusion, as described in new research published in Physical Review Applied.
Antineutrino Detection
Fusion reactors generate large quantities of energy by fusing hydrogen nuclei, which results in powerful neutron emissions. This makes such systems ideal for energy production, since they aren’t reliant on the same kinds of materials used in weapons production.
Still, there are potential concerns, since the neutrons produced by fusion reactors could potentially be used to convert uranium-238—the most common isotope of uranium found in nature—into plutonium-239. The latter isotope is the primary fissile component used in the production of nuclear weapons (along with another variety of uranium isotope: uranium-235).
Given the abundance of uranium-238, scientists warn of the potential for seemingly innocuous fusion reactors being used for the generation of plutonium-239. The only way to prevent this from happening is the use of monitoring systems that could detect such activity.
Fortunately, such detection systems already exist.
The Hunt for Illicit Plutonium Production
According to Huber and his team, antineutrino detectors could hold the key to overcoming this problem.
As one of the byproducts of nuclear reactions, antineutrinos—the very low-mass, chargeless neutrino variants (essentially the antimatter counterparts of neutrinos) can neither be blocked using shielding, nor can they be produced by any known non-nuclear processes.
Because of this, they offer a perfect source for detecting nuclear power generation, including those being operated covertly by any potential bad actors.
The Footprints of Antineutrinos
Given the antineutrino “footprint” produced by the fusion process, Huber and his colleagues used simulations to determine if the signal produced by uranium-238’s absorption of neutrons, which releases antineutrinos as they become split into smaller nuclei, compared with normal nuclear reactor operation. They also used their simulations to make comparisons to another known source of antineutrinos: emanations coming from space.
“We find that even a relatively small detector should be able to confirm production rates of a few kilograms of plutonium over 30 days, despite the cosmogenic background and the antineutrino emissions associated with neutron activation of reactor components,” Huber and the team write in their new paper.
Any such detector could also be operated at a considerable distance from the source reactor, which would make such detection systems practical for use at various facilities.
Fundamentally, the team believes the method their work describes could greatly promote efforts to curb the proliferation of illicit nuclear systems for use in making weapons.
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.
One of nature’s most mysterious predators isn’t a mammal stalking remote forests or jungles, nor any large, finned creature lurking in the ocean depths: it is a bizarre little plant that grows only in certain wetland areas along the East Coast of the United States.
With the distinctive hinged leaves that it uses to capture insects, the Venus flytrap is one of nature’s most curious offerings. The small bog-dwelling plant owes its success to the way it can generate an inviting aroma with the nectar it produces, which lures insects. Then, with the help of tiny follicles that act as triggers, the insects become trapped within the flytrap’s leaves as they close like jaws around its prey.
Scientists have long been perplexed by exactly how these plants can react quickly enough to capture even some of the fastest flying insects. Even Charles Darwin seemed baffled by these curious examples of carnivorous flora, describing them as “a plant [that] should secrete, when properly excited, a fluid containing an acid and ferment, closely analogous to the digestive fluid of an animal.”
While the exact mechanism that allows the mysterious Venus flytrap to carry out its distinctive method of feeding has long remained unknown, new research is finally shedding light on the mystery.
The Venus Flytrap’s Secret is Finally Revealed
According to recent experiments detailed in a new study, when the hair-trigger mechanism is activated on these plants, cells on the jaw-like leaves soften, which initiates the closing movement within fractions of a second, trapping any insects unlucky enough to have landed searching for nectar.
(Image Credit: S. Schuster/Unsplash)
Dr Yoël Forterre, a physicist at the French National Centre for Scientific Research (CNRS) and Aix-Marseille University, says that this movement had been so mysterious to Darwin that “he was convinced that the plant had a muscle inside, but plants do not have muscles and they do not have nerves.”
“For more than a century there have been many hypotheses,” Forterre, senior author of the recent study, said. “It’s very surprising that plant cell walls can tune their mechanical properties so fast.”
The Challenge of Measurement
One of the primary issues with resolving the plant’s curious mechanism involved overcoming challenges associated with measuring such a remarkably fast system of movement, let alone one in a plant, which possesses none of the usual mechanisms nature relies on for such activities.
Equally perplexing is that the Venus flytrap seemingly recognizes when an accidental trigger has been initiated, rather than a successful capture of an insect.
“If you close it accidentally with a drop of water, it will close and then reopen the next day,” Forterre says. “If it catches an insect, it has to digest it and dissolve the skeleton, which will take several weeks.”
In experiments Forterre and his colleagues performed, dental glue was used to secure the plant’s leaves, which allowed for the normal trigger mechanisms to be engaged, but left the plant’s leaves open throughout the process.
Past research had already shown that electrical signals had been detected coinciding with the manipulation of the trigger hairs present on the plant’s leaves, in which this sudden surge of electricity “activates” the plant’s closing mechanism within a fraction of a second.
Solving the Flytrap’s Mystery
Applying a new approach, Forterre and colleagues used the metallic tip of a nanoindenter, devices used to make very small mechanical measurements. Applying the device to the outer leaves revealed that its normal stiffness appeared to soften significantly once the hair mechanisms were triggered.
The reason this occurs, according to Forterre, is that the cells themselves temporarily become more flexible. Past theories suggested that the movement was initiated by the movement of water contained within the leaf.
The newly-identified mechanism reveals a process very similar to the function of a plunger, which, if inverted, will flip back to its normal position when pressure is applied.
Forterre says he is unaware of any similar plant in nature that displays such unusual mechanical properties, which he says allows the Venus flytrap to initiate a “very rapid change of mechanical properties of the cells.”
“I’ve been obsessed by this for 20 years,” Forterre recently toldThe Guardian, noting that “as a physicist, I thought we should understand the motor, the forces.”
Now, thanks to his team’s findings, one of the plant kingdom’s strangest inhabitants has finally revealed its secrets.
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.
A disc-like object observed producing “beams” while it hovered above an airport in Zimbabwe in 2008, an object resembling a flying “potato” over the Cheyenne Mountains in 2022, and alleged “orbs” observed by U.S. personnel are all among the sightings included in the Pentagon’s latest release of files related to UAP encounters.
“As the unprecedented levels of interest in both this topic and the Trump administration’s historic transparency effort continue, WAR.GOV/UFO has received over 1.7 billion hits worldwide since the site’s launch on May 8, 2026,” read a statement provided by Assistant to the Secretary of War for Public Affairs and Chief Pentagon Spokesman Sean Parnell that accompanied Friday’s release.
“The Department of War and our agency partners are actively working on the next release of UAP files,” Parnell added.
However, as more videos and documents continue to surface, a fundamental question arises: what, if anything, do they reveal about UAP, and how the United States intelligence community collects and processes information about these objects, whatever their origins may be?
What the Latest PURSUE Release Reveals
Within the latest batch of files from what the Pentagon characterizes as the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE), a previously unreleased file from the U.S. Central Intelligence Agency (CIA) describes an unusual observation of an object that reportedly hovered above the Harare International Airport in Zimbabwe in 2008.
“Individuals debated if the sighting was an advanced reconnaissance device of a foreign government or of extraterrestrial origins,” a short description provided with the document states. Although no video or other supplemental data is provided, the written account that the document contains, which features partial redactions, states that observers described a “disc-like” object possessing a hollow center and “a series of rotating lights on the underside of the airframe.” As the lighting shifted colors, the object reportedly ascended quickly and was soon out of sight.
“Regardless of the origins,” the document states, the incident reportedly “resulted in the decision to place the Zimbabwe [redacted] on high alert.”
Another series of documents describes an observation of an object shaped like a “potato” that was seen near Colorado Springs in 2024.
Witnesses at the time described seeing “distinct edges” on the object, which “appeared to look painted in a creamy/whitish opalescent color.”
A digital rendering of an unresolved UAP Report from Colorado Springs in 2022 (Image Credit: U.S. Department of War).
“It was somewhat translucent with a slight shimmer,” the report states. “The object was made up of what can best be described as articulating fish scales or panels that were non-symmetrical, non-overlapping, and irregular shaped. The object itself was perfectly still but each panel on the object shifted in slow waves starting at different points of origin but at the same time.”
According to an assessment of the sighting by the All-domain Anomaly Resolution Office, which currently leads the Pentagon’s investigations into UAP, “Analysis possibly indicates that the positioning on the sun in relation to Cheyenne Mountain would allow for backscattering of sunlight reflecting off snow-covered ground.”
“This reflection could illuminate low-level clouds in the vicinity,” according to the assessment, which was produced by one of AARO’s intelligence community (IC) partners, adding that such conditions “might account for the visibility of the object followed by its sudden disappearance.”
The report concedes that the analyst had “low confidence in this assessment” based on limited information made available about witnesses at the time, such as their individual field of view, as well as the level of cloud cover over the area at the time.
Another pair of documents describes what sounds like a very intriguing observation of an “intense bright light” seen hovering below the tree line near the observer’s backyard. Emerging from their vehicle, the witness observed a “strange light” that they estimated to be approximately one meter in diameter. The object was described as a “brilliant and beautiful” reddish color the observer had never seen before, adding that “inside the red sphere, at the center, there appeared to be what [redacted] described as a ‘white plasma sun’ about the size of a basketball.”
In this instance, the written accounts were not alone: a supplemental video indeed shows a pair of objects matching the description provided, which look suspiciously like candle balloons, also known as “sky lanterns,” drifting along with the breeze. Additionally, the footage bears a resemblance to a video released by an aviation safety advocacy group last year (and in fact, it may be the same video), which was also quickly assessed to have been sky lanterns, rather than anomalous UAP “orbs.”
In short, the latest Pentagon releases—as with most other recent releases of government data related to UAP—feature some interesting stories, though the majority of the “new” data remains underwhelming, at least at first glance.
Hopeful—but Skeptical—Ufologists
In a posting on his X account, prominent skeptic Mick West noted that in advance of the Pentagon’s second PURSUE release, “ufologists (myself included) were hopeful we’d get some amazing evidence.”
“All 46 videos have been released,” West wrote. “None of them are amazing. Maybe it’s time to consider that this might be the best they have.”
Whether or not the videos we’ve now seen are indeed among the best examples of UAP in the Pentagon’s holdings, West isn’t wrong to point out the obvious: the current examples the Pentagon has provided fail to establish that there is anything truly extraordinary about the objects these videos convey.
West places himself in the commendable position of being among the hopeful “ufologists” that he says are eager to see better data on these phenomena. I can affirm that this author is among those ranks as well, having followed the subject for decades; beyond that, and reporting on the subject for The Debrief, I have also managed an independent UAP sightings reporting website for the last two years, as a self-funded citizen science effort to collect data on possible UAP observations and make it freely available to the public. Unlike a few similar sites and apps that crowd-source data on possible UAP sightings, I also work to assess the data and resolve cases whenever enough information has been provided to make that feasible.
Like West would probably also tell you, I can confirm that the majority of UAP sightings have prosaic explanations, which can often be determined using resources that include weather data, aviation tracking sites, astronomical software, rocket launch data, and other online resources that are generally free to the public. After attempting to resolve UAP sighting reports, there is, however, a residuum of unresolved cases that remain intriguing.
Assessing UAP videos in this way, in order to determine whether they document real anomalous phenomena or simply misidentifications of known objects, often carries a very negative stigma, partially because it has an equally negative term attached to it: “debunking.” The negative association here is unfortunate, since the careful study and interpretation of purported UAP imagery and, when warranted by evidence, its classification as either misidentified known phenomena or genuine unresolved cases, is one of the most beneficial ways we can work toward advancing our understanding of the UAP issue.
Equally unfortunate is the fact that, all too often, what we get instead when it comes to UAP releases is just the opposite: imagery and other data (sometimes including official U.S. government materials released through unauthorized channels) that have undergone virtually no assessment, and which feature scant accompanying details required to help contextualize the sightings.
What we are left with are usually blurry videos and images of objects that end up seeing wide circulation, often with the help of the most ardent promoters of UAP (many of whom also happen to be equally skilled at self-promotion). Beyond making a poor case for the legitimate study of UAP, such instances invite criticism—although not so much from the hopeful, skeptically-minded “ufologists” genuinely interested in viewing quality UAP data. Rather, the most frequent attacks originate from ideological, self-branded “skeptics” whose real focus appears to be aimed at superficially undermining the topic and its proponents using rhetoric heavily dipped in ad hominem, all as a means of driving engagement through their social media accounts.
Who can really blame them? Such high-traffic social media engagement can reportedly be quite profitable these days, and let’s face it: few among the most active voices in the online UAP fracas these days appear to be above engaging in a bit of good old-fashioned grifting—including the ones who often complain the loudest when they see others doing it.
Fundamentally, though, none of this helps to advance our knowledge about UAP. Answers to questions about what these objects are, as well as what they aren’t, and whether any good evidence exists for truly “anomalous” behaviors often associated with these objects by those who witness them, remain void from such contentious prattling—just as it apparently remains absent from the vast majority of the new records released by the Pentagon.
However, that isn’t to say there aren’t at least a few intriguing data points that have emerged from the recent releases.
An Intriguing UAP Case from the Second PURSUE Release
In the second batch of videos released by the Department of War, one potentially intriguing example of an unidentified flying object seems to have gone mostly overlooked.
The case involves imagery from the holdings of the All-domain Anomaly Resolution Office that was originally captured on April 12, 2021. Labeled “Spherical UAP [CALLSIGN] 2021/04/12 vid 0,” the footage, according to details provided at the time of its release, “is likely derived from a full-motion video camera and an infrared sensor aboard a U.S. military platform operating within the United States Central Command area of responsibility in 2021. A user uploaded this video to a classified network in June 2024.”
According to a short description provided by the Department of War, “An area of contrast enters the sensor field-of-view from the upper right corner of the frame, exiting in the bottom right corner of the screen. The sensor pans to track the area of contrast, centering it within the sensor field-of-view.”
“The sensor changes modes as the area of contrast becomes indistinct against the background,” the summary concludes.
However, viewing the footage reveals something slightly more intriguing than this description alone conveys. The footage appears to show a small, light-colored object moving above a rugged desert terrain, presumably somewhere in the Middle East. As the object is being filmed using the electro-optical system on board a United States military drone, at one point, the object can be seen as it begins to descend in altitude, an elevation change made apparent by the shadow the object casts against the terrain below it (as can be seen in the still frame from the footage featured below). At this point, the object engages in a sudden change in direction and appears to enter a shadowed area of the landscape, at which time its brightness (seemingly due to reflectivity of its surface) is significantly diminished by the surrounding shadow, and the object becomes indiscernible.
Screen capture from the Pentagon UAP video titled DOW-UAP-PR061, “Spherical UAP [CALLSIGN] 2021/04/12 vid 0”, where the object’s shadow can be discerned against the nearby landscape (to the left of the small white object, seen just above and to the right of the center of the frame (Image Credit: U.S. Department of War).
The most intriguing aspect of this behavior is the object’s apparent movement into what we might interpret as a position of concealment. In doing so, the object not only appears to “hide,” but it also demonstrates an obvious change in direction that is suggestive of controlled motion. This is significant for a few reasons: one is that in many purported UAP videos, a phenomenon known as the parallax effect can (and often does) lead to an optical illusion where a slow-moving or even stationary object can have the appearance of moving. This illusion is caused by differences in relative speed between objects closer to the camera and those further distant, causing any closer objects to appear to be moving faster than those in the background (a good explainer on parallax effect and its relationship to UAP sightings can be read here, made available at the website of the All-domain Anomaly Resolution Office).
In the case of the “Spherical UAP” featured in the video from the second PURSUE release, perhaps some degree of motion parallax cannot be ruled out. However, the object’s descent just before changing direction and entering the rugged portion of terrain cast in shadow appears to clearly demonstrate in this case that the object is engaged in movement, which equally appears to convey intelligent control. Finally, an interpretation that the object may be taking a position of concealment, if correct, may indicate that the object and/or its operators had been aware that it was being observed.
Does anything conveyed in this video offer proof of extraterrestrial technology? Absolutely not. Are there any obvious signs of extraordinary capabilities being demonstrated by this object? No, there aren’t. What this video does demonstrate, however, is footage of an object that appears to be engaged in behaviors that clearly show movement beyond the capabilities of most simple balloons, and one that may fit the general description of objects the Pentagon’s All-domain Anomaly Resolution Office has characterized as its general “target” description for UAP it investigates (more on that in a moment).
In the case of the DOW-UAP-PR061, “Spherical UAP [CALLSIGN] 2021/04/12 vid 0” footage, the object not only demonstrates changes in its direction of motion, but also appears to conceal itself. Obviously, a better interpretation than “balloon” in this instance might be some kind of unmanned aerial system, although what limited information the footage conveys is simply too indistinct to be able to tell. Altogether, it simply remains “unidentified” in the purest sense: some kind of object engaging in what appears to be controlled flight, while not exhibiting any otherwise extraordinary capabilities.
However, all of this raises another important question about UAP reports: why do we always have to assume that an object must display “otherworldly” or otherwise extraordinary capabilities for it to qualify as a “genuine” UAP?
The Problem of Conditioning
Another intriguing phenomenon related to the recent release of UAP information by the Pentagon involves the similarity in responses to these releases from both UAP advocates and UAP skeptics.
Some proponents of genuine anomalous UAP have expressed frustration over the Department of War’s release of several dozens of videos, all of which fail to reveal any “classic” UFO shapes like flying saucers or giant black triangles, nor any confirmation of extraterrestrial technologies detailed in the troves of formerly classified documents included with the releases.
Meanwhile, skeptics essentially argue the same thing: so far, these videos show nothing particularly remarkable, and clearly fail to prove that extraterrestrials have visited Earth.
In short, the fundamental premise of most “believers” and “skeptics” appears to be the same: “UAPs either must represent evidence of extraterrestrials, or else they are unimportant.”
This premise fails to acknowledge several important issues, such as 1) that many ideas about how UAP are supposed to look and behave are based on presumptions about how we expect any technologies produced by extraterrestrials advanced enough to traverse interstellar distances would appear to us, 2) that UAP could still represent a genuine mystery, even if they aren’t evidence of extraterrestrial technologies, and 3) that even if most UAP turned out to be technologies of earthly origin, they could still represent a security concern, and hence warrant U.S. government investigation.
Clearly, it should be acknowledged that there is also witness testimony—some of it quite compelling—that describes unusual characteristics associated with UAP, such as extreme acceleration, erratic movement, exceptional agility/maneuverability, environmental effects, and other capabilities which could only be characterized as “anomalous.” Such descriptions are also part of what informs many of our expectations about how UAPs are supposed to behave. However, it is important to recognize that just because such eyewitness descriptions exist, it does not necessarily mean that we can—or should—attribute such capabilities to all UAP observations, and thereby use such presumptions as a gauge for their credibility on a case-by-case basis.
How the All-domain Anomaly Resolution Office Characterizes UAP
A careful review of resources made available by the Pentagon’s All-domain Anomaly Resolution Office (AARO) helps to shed further light on the attributes of what it characterizes as UAP.
A page dedicated to education and resources at AARO’s website lists a small collection of studies detailing current state-of-the-art technologies related to spherical drones, novel propulsion systems, and other technologies, which it says represent “advanced propulsion systems that are consistent with UAP observations.” The obvious implication of providing such resources involves the consideration that at least some UAP appear to operate in ways consistent with known earthly technologies, albeit ones that are still in their emergent stages.
AARO also gives us the following definition of UAP, according to an AARO Mission Brief featured at its website: “Unidentified Anomalous Phenomena (UAP) are sources of anomalous detections in one or more domains (i.e., airborne, seaborne, spaceborne, and/or transmedium) that are not yet attributable to known actors and that demonstrate behaviors that are not readily understood by sensors or observers.”
The brief goes on to define “anomalous detections” as “phenomena appearing to demonstrate capabilities or material properties exceeding the known state-of-the-art,” adding that UAP “may consist of one or more objects and may persist over an extended period,” are mainly “attributable to domain-awareness gaps, and in at least some cases “may represent advanced capabilities operating in domain awareness gaps.”
The AARO Mission Brief also separates the misidentification of known objects such as balloons and drones, as well as developmental or experimental platforms, from “genuine” UAP, which it clearly defines as AARO’s designated mission area.
According to past information produced by AARO under the tenure of its inaugural director, Dr. Sean Kirkpatrick, typically reported UAP characteristics include appearances of generally round objects roughly 1-4 meters in size, possessing white, silver, or translucent coloration. Performance altitudes, on average, fall within 10,000 to 30,000 feet, and velocities of the objects range from hovering in a stationary position to movement at speeds of up to Mach 2 (1534.54 miles per hour).
Above: Table featuring commonly attributed UAP characteristics based on AARO data available in 2023 (Image Credit: U.S. Department of War/All-domain Anomaly Resolution Office).
Despite such capabilities, no kind of thermal exhaust has been associated with these objects, and their propulsion systems remain unknown. Additional signatures associated with such genuinely anomalous UAP, according to AARO, include “intermittent, X-Band (8-12 GHz)” radar, as well as radio frequency emissions in the 1-3 GHz and 8-12 GHZ ranges. While no thermal exhaust evidencing propulsion is evident, intermittent shortwave infrared and medium-wave infrared thermal signatures are occasionally detectable.
“That’s what we’re looking for and trying to understand what that is,” Kirkpatrick told U.S. Senators during an April 2023 hearing that first revealed the AARO technical data described above.
Given the specificity of such technical information (all of which, as cited above, relates to AARO materials produced in 2023 during its early period in operation), one must wonder how such details could be derived from any of the videos or other materials the Department of War has released under the recent PURSUE initiative.
The obvious implication is that the data described above must have other, better-quality sources, which have not yet been released by AARO or the Department of War.
What This All Means, for Now
Of course, AARO also maintains that it has found no evidence of extraterrestrial technologies in its UAP investigations. All this taken together, a few things can be concluded based on the totality of AARO’s findings since its investigations began: 1) some objects appear to be genuinely anomalous, which AARO calls UAP, 2) AARO takes its investigations of these objects seriously, 3) studies involving breakthrough or disruptive technologies available at its website imply that AARO may suspect some UAP of being related to such developments, and are therefore not currently misidentifications of well-known objects or technologies, but possible “breakthrough” technologies whose origins remain unattributed, and 4) specific details about appearance and operational characteristics of AARO’s UAP “target package” strongly suggest the existence of higher quality UAP data that likely remains classified.
If it ends up being true that additional, higher-quality UAP data exists in U.S. government holdings—data from which AARO’s own technical attributes for genuinely “anomalous” UAP are derived—it therefore stands to reason that the recent batches of imagery fall significantly short of being the “best data” that has been obtained about these objects. Still, some of the videos, such as DOW-UAP-PR061 (described earlier in this article), nonetheless appear to match the so-called “target package” for genuine UAP first characterized by Kirkpatrick in 2023, even if they aren’t the most astonishing UAP videos in existence. Again, we should consider the conditioning outlined earlier, which has helped to encourage the public’s never-ending expectation for “extraordinary” revelations, most of which end up falling flat once they do finally come to light.
The bigger questions, for now, are whether such examples of higher-quality UAP data do indeed exist, and if so, whether they will be made public in any future releases.
“We are collecting as much data as possible, following the data where it leads, and sharing our findings whenever possible,” AARO states on its website. “We will not rush to conclusions in our analysis. In many cases, observed phenomena are classified as ‘unidentified’ simply because sensors were not able to collect enough information to make a positive attribution.”
Arguably, if there are better quality UAP materials in AARO’s holdings, there are probably very reasonable considerations for why that information has not yet been released, which may include uncertainty about whether some data could involve potentially sensitive information about experimental U.S. technologies or those of foreign adversaries, the release of which could have implications that, for now, may warrant secrecy.
In conclusion, although most of the videos in the recent Pentagon UAP releases provide too little data to draw any firm conclusions, arguably, some of the most important considerations are made evident by what the recent releases don’t contain—especially when compared to the information AARO uses as the basis for what it calls “genuine” UAP.
To borrow that overused X-Files quip once again, “the truth is out there.” Whether we’ll be seeing the best data that supports that truth any time soon is another question entirely.
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.
Archaeologists have discovered an unusual artifact they say could represent the earliest known use of written numbers ever discovered in Mesoamerica.
The curious clay figurine features eleven small dots carved into its surface, appearing in three columns. Although its exact purpose remains unclear, researchers who report the discovery in Latin American Antiquity believe it could be one of the oldest examples of graphic notation that may have been used for rudimentary calculation or some similar purpose, dating to as far back as around 750 B.C.
Significantly, the researchers behind the recent study argue that this earliest known evidence of numerical writing could offer clues to “the relationship between numeration, bodies, and identity in ancient Mesoamerican worldviews.”
The Enigma of the Tab Figurines
The figurine, roughly the size and shape of a small television remote, was unearthed at an ancient Mesoamerican site located along Guatemala’s Pacific coast, known as La Blanca. It is among a group of similar artifacts archaeologists call tab figurines, and hundreds of these mysterious relics are known from past discoveries at the site.
Named for their unusual slab-like appearance, these figurines also bear anthropomorphic qualities, which include depictions of jewelry and other ornamentation, although the tab figurines do not directly resemble human heads beyond the presence of such ornaments.
A Remarkable Discovery at Ancient La Blanca
While similar past discoveries recognized as tab figurines have been made at La Blanca, the presence of dots appearing in columns makes this one very unique and presents a novel possibility: that the impressions on the statuette may not have been purely decorative.
“The ordered dots on the La Blanca tab figurine’s headdress, of course, raise more questions than they answer,” write authors Julia Guernsey, Stephanie M. Strauss, and Michael Love in their recent study. “This is often the case with unique examples such as this, which cannot be better contextualized within a larger grouping of like objects from La Blanca or elsewhere.”
The ceramic “tab” figurine with headdress band and potential dot numeration from the Joyas Group at the archaeological site of La Blanca, Guatemala, alongside an artistic rendering of the artifact by Julia Guernsey (Image Credit: J. Guernsey/South American Antiquity)
“Although one might be inclined to dismiss the La Blanca figurine as a curiosity or an isolated addendum to the complicated history of first writing in Mesoamerica,” the authors go on to note, “we believe that it merits this thorough discussion.”
Clues to Unraveling a Mesoamerican Mystery
A clue to the artifact’s purpose may arise from the association between tab figurines and the human head, a region of the body that is traditionally associated with individual identity. This is significant, since archaeologists recognize a potential link between numbers and individual identity in the world of ancient Mesoamerica.
Based on existing archaeological knowledge from the region, it is known that experimentation with numbers had already begun around the time the artifact is believed to have been made. One well-characterized numerical system is known as the dot-and-bar system, which, as the name implies, relies on dots and bars to convey figures of one and five units, respectively.
“In the Mixtec and Aztec codices, one easily becomes accustomed to reading even long strings of single dots and quickly approximating their quantity, a visuo-summation process known as subitizing,” the authors write.
“And no matter what form Mesoamerican numerals took, the vigesimal system was rooted in metaphors/mnemonics of the body: specifically, 10 fingers and 10 toes and concepts of personhood anchored to the number 20,” they add.
Also of significance is the K’iche’ word for person, winik, which is the same word used for the number 20, and for a simple reason: it refers to the ten fingers and ten toes of the human body.
Connections to Mesoamerican Personhood Concepts
Although the connections between the unique figurine unearthed at La Blanca and existing knowledge of Mesoamerican number systems are compelling, the researchers caution against interpreting the artifact solely through the lens of later Mesoamerican writing systems. One main reason why is that scholars think there probably wasn’t ever any single method for recording numbers across the region.
Still, the artifact nonetheless joins a growing body of evidence that could point to the fact that the inhabitants of La Blanca were experimenting with symbolic communication, and at a time centuries before fully developed writing systems emerged in the region.
While the exact meaning of the dots on the statuette remains unknown, the researchers behind the study make a compelling case for why the markings may have represented a name, a date, or another personal identifier. If correct, the placement of the dots may hint at an early connection between numeration, identity, and social expression during a period when some of Mesoamerica’s first urban communities were taking shape.
“Yet a question remains as to whether the identity expressed by the La Blanca tab figurine with its 11 dots was human, supernatural, or a combination thereof,” the authors concede, although concluding that their assessment of the artifact strongly points to the known associations between time, numbers, and the concept of personhood as envisioned in the minds of ancient Mesoamericans.
“Early Mesoamerican conceptualizations of time and the nature of being, perhaps, were not so very different from those of Aristotle for whom Paul Ricoeur noted, ‘Being in time [meant] more than existing when time exists. It [meant] ‘being in number.’”
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.
Thousands of years ago, Scotland’s early inhabitants were building mysterious artificial islands in lakes throughout the region—and now archaeologists have uncovered evidence that reveals these curious aquatic features to be far older than once thought.
Scattered throughout Scotland’s ancient lochs, these curious structures—known as crannogs—have long intrigued archaeologists and historians, partially due to the questions about their age.
Now, artifacts recovered from these human-built islands are pushing back the timescales on their construction, causing researchers to have to reconsider the origins of one of the most enigmatic lacustrine features in the British Isles.
The Crannog Enigma
Crannogs have been known to archaeologists for some time, with some of the earliest extensive explorations of these features undertaken beginning more than a century ago by Odo Blundell, a monk at Fort Augustus Abbey.
Historical photo of the crannog at Loch an Dùin, on the Inner Hebridean island of Coll (Public Domain).
Constructed mostly from stone and timber, speculations about their creation extend to as early as the Bronze Age, although most scholars believe these curious features were likely to have been an invention of the Iron Age.
However, a surprising recent discovery is now challenging that presumption, revealing that some of these artificial islands date back to more than 5,000 years ago, having been built during Scotland’s Neolithic era.
Older Than Previously Thought
The story began to unfold in 2012 when local diver Chris Murray was exploring a crannog near the Isle of Lewis in Scotland’s Outer Hebrides. There, he discovered fragments of ancient pottery that experts at the National Museum of Scotland later examined, revealing an astonishing discovery: the remains of artifacts unequivocally associated with the Neolithic period.
The implication was obvious: for Neolithic pottery to have been found on this crannog would indicate it must have been constructed thousands of years earlier than the past dating of these artificial islands.
A crannog at the Loch of Wasdale (Image Credit: Derek Mayes/CC 2.0)
The discovery prompted a deeper look at the region’s ancient artificial islands, which soon revealed additional evidence of their Neolithic provenance. During the research, Stephanie Blankshein, a maritime archaeologist at the University of Southampton, and colleagues discovered that organic materials and artifacts from several sites across Scotland’s Outer Hebrides indicated these crannogs were likely built sometime between 4,000 and 2,500 BCE.
At least 11 crannogs in the region, Blankshein and her colleagues say, were created during the Neolithic period, pushing back the date of their construction to as far back as six thousand years ago.
Rethinking the Lives of the Ancient Scots
One of the most intriguing aspects of the team’s findings involves what it reveals about the ingenuity of the early farming communities in the British Isles, since the new dating of these prehistoric artificial islands indicates that they must have been constructed within just a few centuries of when their ancient builders arrived in the region.
Such findings align well with past genetic studies, which indicate that the region’s Neolithic populations likely descended from farmers who made their way from the Near East through Europe, and eventually settled in the British Isles, where they made their new homes by the sea.
It remains unclear, however, whether the construction of crannogs had been an innovation that occurred after they arrived in Britain, or if this had been a much earlier practice these people brought with them.
Discoveries at the Loch Bhorgastail Crannog
Among the most remarkable crannog sites is one found at Loch Bhorgastail on the Isle of Lewis. This artificial island was initially believed to have been primarily built from stone, with some evidence of timber used as reinforcement.
However, underwater excavations by Blankshein and her colleagues soon uncovered something very surprising hidden below the crannog: a massive timber platform supporting the entire structure.
“As excavation advanced, it quickly became apparent that the terrestrial and underwater components formed a single continuous structure spanning both environments and could not be treated separately,” Blankshein and her colleagues write in a recent study detailing their research at the site.
During their underwater surveys, the team discovered that the wooden foundation extended beneath the entire island and dated to between 3500 and 3300 BCE. Measuring approximately 75 feet (23 meters) across, the platform may have originally sat in shallow water or even remained dry during parts of the year.
“Loch Bhorgastail provided a rare opportunity to develop, test, and refine a workflow capable of achieving terrestrial-grade accuracy underwater,” the research team writes. “The site demonstrates the potential of shallow-water archaeology to bridge the land–water interface while elevating the precision and reliability of underwater recording.”
Lingering Questions
A fundamental question that remains about these curious Neolithic constructions has to do with what their purpose was.
One clue may arrive in the form of residues found on the recent pottery discoveries at several of these sites, which indicate they were used to transport food. This may suggest the crannogs were locations where ancient people prepared and consumed meals, possibly during ceremonial gatherings.
However, it is also possible that these ancient structures served multiple purposes, ranging from sites for communal feasting to possible locations for meetings.
Despite the lingering questions about their use by Scotland’s ancient inhabitants, Blankshein and her colleagues saw these marvelous Neolithic structures as an ideal target for high-resolution shallow-water photogrammetry, which became the focus of her team’s recent research.
“Coastal, riverine, and lacustrine environments have played a central role in the development of human societies, yet locating and documenting this record of activity in littoral environments has proven difficult,” the team writes.
As a result of their research, the team’s findings, combined with recent archaeological discoveries from over the last decade or more, help to shed new light on Britain’s ancient past, while advancing the development of new archaeological approaches. This includes groundbreaking methods for creating 3D models of shallow underwater sites, which the team achieved by using paired action cameras.
As investigations continue, Blankshein and her colleagues suspect many more Neolithic crannogs remain hidden beneath the waters of Scotland and Ireland, and with their discovery and investigation, the potential for further advancements in understanding Europe’s earliest farming societies.
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.
Nearly three out of every four images obtained by NASA’s new SPHEREx space telescope revealed something many astronomers were afraid of: contamination by artificial objects humans are launching into space.
The findings were reported in a new preprint paper by researchers at NASA’s Ames Research Center, who say that 73.3% of all the images the telescope captured over four months last summer revealed evidence of at least one trail left by SpaceX satellites or other orbital spacecraft.
What may be worst of all is that astronomers aren’t surprised.
With its mission to map the night sky in near-infrared light, NSA’s Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx) relies on long-exposure imagery that enables it to map large regions of the sky with every viewing.
Unfortunately, long-exposure photography is also ideal for capturing the movement of satellites, an increasing number of which have been placed in orbit in recent years.
Equally troubling is the fact that SPHEREx, from its own position in Earth orbit, had been positioned at an altitude where it was hoped that the number of satellite streaks could be limited. Yet despite such efforts, the new paper featured at the arXiv preprint server reports that, on average, at least two satellite trails were detected in every exposure.
Satellites Mistaken for Cosmic Rays
Astronomers have been raising concerns about this problem already for some time, and presently, there doesn’t appear to be any near-term solution.
Even beyond image contamination, the preprint study also found that several satellites that enter SPHEREx’s field of view are bright enough that they are also triggering the space telescope’s automated system that protects its delicate components from stray cosmic rays.
Designed to shut down the telescope’s data collection when it detects what it suspects are cosmic rays, the new research reveals that some satellites reflect enough light to engage algorithms that control this defense system.
Even in instances where imagery is successfully obtained, albeit with contamination from satellites, the brightness of these orbital objects can effectively obscure objects behind the portions of the telescope’s images where the satellites appeared.
In the images above, several examples of satellite trails are shown in SPHEREx imagery collected during the summer months of 2025 Image Credit: NASA/Borlaff, et al/arXiv.org).
A Growing Concern
The new SphereX findings are only the latest indication that astronomers were right to be concerned about potential light pollution from satellites. In a past study by Sando Kruk and colleagues, Hubble Telescope images had shown an increase in the number of satellites crossing its field of view, rising from contamination shown in just 2.8% of its images, to 5.9% over a period of two decades.
Ideas about how to prevent the issue have focused on using anti-reflective coatings on satellites and other means of reducing their brightness once they reach orbit. However, many modern satellites are large enough that having darker exteriors doesn’t help to significantly mitigate the amount of light they can reflect.
Additionally, the study’s authors note that “Optical reflections are just a fraction of the problem, since satellites also emit and reflect [infrared],” meaning that optical darkening efforts “might even increase their temperature, making them brighter in the IR.”
Worse Before It Gets Better
According to the study’s authors, the problem is likely to worsen before astronomers see any improvements.
“Remarkably, some private operators have announced the intent of deploying 4000 purposely high reflective satellites,” the researchers write, which aim to provide “sunlight on demand.” Such artificial orbital systems, if successfully deployed, would reflect light as much as five times the brightness of the full Moon onto areas of the Earth roughly five kilometers in diameter.
This, the team argues, would potentially have “a catastrophic impact to the quality of the dark sky and the Earth’s inhabitants.”
Fundamentally, the authors hope that bringing additional attention to such issues with their recent study may help to mitigate future concerns about our ever-brightening night sky.
“The widespread contamination addressed in this paper affects multiple areas of astronomical research,” the team says, which they say includes “the study of transient phenomena, deep imaging surveys, spectroscopic studies, and the search for Near-Earth Objects (NEOs), thereby hindering our ability to understand the Universe and protect the Earth.”
The new paper by Alejandro S. Borlaff and colleagues, “SPHEREx confirms predictions for artificial satellite trail pollution in Low Earth Orbit,” appeared at the preprint arXiv server.
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.
A shelter-in-place order issued at the Pentagon on Thursday has now been lifted, officials have confirmed, following what was characterized as a “hazardous materials incident”.
Earlier on Thursday, firefighters arrived at the building, which serves as the headquarters of the United States Department of War, in response to concerns involving air quality at the facility.
“Earlier this morning, Pentagon occupants were notified of a potential air quality issue, prompting immediate precautionary safety measures and evaluation,” said Pentagon spokesman Sean Parnell in a posting on X.
“Subsequent testing confirmed no hazard exists, and normal operations have resumed,” Parnell said. “We express our sincere appreciation to the first responders for their swift actions to ensure the safety of all personnel.”
In an earlier post, Parnell said that the Pentagon houses “sophisticated systems to ensure the safety of the building and its occupants,” which had reportedly detected “an air quality issue necessitating precautionary measures until we determine its significance.”
In response to the unspecified air quality issue, the Department of War observed what Parnell characterized as “standard protection protocols, including a shelter-in-place order for the affected area.”
“Response teams are in place and ready to support building occupants,” the early statement read.
Separate postings on social media from Arlington County Fire and Rescue indicated that its personnel were on the scene supporting hazmat teams while the incident was under investigation.
Presently, it remains unclear what the issue was that prompted the concerns at the Pentagon, where close to 30,000 U.S. military and civilian personnel are employed.
This is a developing story, which may be updated as new information is made available.
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.
Welcome to this edition of The Intelligence Brief… This week, the ongoing conflict between the United States and Iran appears to be edging closer to a broader regional crisis, as both nations exchange new rounds of military strikes amid fading hopes for diplomacy. In our analysis, we’ll be looking at 1) the latest U.S. and Iranian attacks near the Strait of Hormuz and across the Gulf region, 2) President Trump’s escalating rhetoric and warnings of additional military action targeting Iran’s oil infrastructure, 3) the growing humanitarian and economic consequences of the conflict, including disruptions to shipping and concerns over civilian infrastructure, and 4) why analysts increasingly fear that continued escalation could draw the region closer to a wider war with global repercussions.
Quote of the Week
“The strikes are in response to Iran’s unwarranted and continued aggression. U.S. forces remain vigilant, lethal, and ready.”
– U.S. Central Command, June 10, 2026
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Ongoing U.S. Conflict with Iran Could Signal a Broader War
This week, a clear end to the ongoing U.S. conflict with Iran still seems remote, as the United States and Iran engaged in another round of military strikes.
Early this morning, strikes exchanged between the nations’ military forces signaled the potential that a dangerous new phase of the conflict may be approaching, after an initial several months of efforts aiming to avoid escalation to a broader regional war.
Among the most recent attacks, several locations near the Strait of Hormuz were targeted, as ongoing warnings by President Trump urged Iranian officials to heed U.S. warnings and bring the conflict to an end.
Latest Attacks in the U.S.-Iran War
In response to the attacks, Iran also launched several strikes on targets linked to U.S. assets that include military facilities in Kuwait and Bahrain. The Iranian strikes prompted air-defense activity throughout the region, along with airspace restrictions that have been temporarily elevated in the Gulf.
Amid the strikes, Iranian officials claimed that all maritime traffic had been closed off from passage through the Strait of Hormuz. However, U.S. officials disputed the claims on Thursday.
The renewed violence follows several strikes confirmed by U.S. Central Command late on Wednesday.
“CENTCOM forces launched strikes on Iranian military surveillance capabilities, communication systems, and air defense sites across Iran. U.S. Marine Corps, Air Force, and Navy assets fired precision munitions on Iranian targets that posed a threat to U.S. forces and international commercial ships transiting regional waters,” read a posting on the official U.S. Central Command X account.
Trump: U.S. Will “Assume Total Control”
Early on Thursday, President Trump also warned about further military action by the United States against Iran.
“The United States will be hitting Iran (Whose Navy, Air Force, Radar, Anti Aircraft, and all other forms of Defense, together with most of its offensive capability, are GONE!), VERY HARD TONIGHT,” President Trump wrote in one of his characteristically bombastic social media postings on Thursday.
Trump also claimed that in “the not too distant future” the U.S. would be capturing Kharg Island, along with other locations that play a key role in the oil infrastructure of the region, with the broader plan to “assume total control of their Oil and Gas Markets, much like we have with Venezuela, which is working out brilliantly for both Venezuela and the United States of America.”
Beyond the typical hyperbolic phrasing, the President’s post on Thursday appeared to indicate locations that could become future targets, although similar ongoing threats have repeatedly been made by Mr. Trump in recent weeks, in an effort to encourage Iranian officials to agree to U.S. demands that aim to curb the country’s nuclear ambitions—a significant goalpost the U.S. has maintained in efforts to end the war.
As Escalations Continue, Broader Problems Emerge
Efforts to bring about a cease-fire agreement have been in the works since April, although Iran’s foreign ministry now says such efforts have been rendered “meaningless” by the continued American strikes.
Firing back, U.S. officials, including Secretary of War Pete Hegseth, have characterized the attacks as being “part of an effort to pressure Tehran into accepting negotiations over its nuclear program” amid broader security concerns the U.S. is attempting to reconcile.
However, more broadly, the conflict is also having a far wider economic and humanitarian impact. Recent U.S. military operations that have targeted vessels suspected of transporting Iranian oil have reportedly struck multiple commercial ships in recent days, with India confirming that three of its citizens were killed aboard one tanker.
“CENTCOM forces have disabled nine non-compliant vessels, redirected 135 ships that complied, and allowed 42 vessels supporting humanitarian aid to pass since initiating the blockade on April 13,” U.S. Central Command wrote in an update on Thursday.
“The blockade is being enforced impartially against vessels of all nations entering or departing Iranian ports and coastal areas, including all Iranian ports on the Arabian Gulf and Gulf of Oman,” the posting added.
Humanitarian and Economic Concerns
Based on satellite imagery reviewed by analysts, the potential that some of the recent strikes may have damaged drinking-water infrastructure in southern Iran has also been raised, increasing humanitarian concerns.
Financial markets are also reacting to the growing instability. The European Central Bank cited war-related inflation pressures as it raised interest rates, while the World Bank warned that rising energy costs linked to the conflict are slowing global economic growth to its weakest pace since the COVID-19 pandemic.
Overall, as the ongoing military operations by both nations continue, and with few signs of diplomacy on the immediate horizon, concerns continue to mount over whether a broader regional crisis—one the U.S. has hoped to avoid—could now loom nearer than at any time before.
California could be due for a major earthquake in the near future, according to concerning new models based on data comprising 1,000 years of quake activity on the West Coast.
According to recent findings, tectonic stress has quietly been building in California to levels not seen since the last major earthquake in the region, which bore a magnitude of 7.9 and struck the West Coast nearly 170 years ago.
That event, known as the Fort Tejon earthquake, affected the greater Los Angeles area, and since the time of those historic rumblings, researchers have grown increasingly concerned about a period of seismic silence that could point to the likelihood of an event of similar magnitude at some point in the future.
The potentially concerning new forecast was detailed in a recent study by an international team of researchers led by Dr. Liliane Burkhard of the Division of Space Research and Planetary Sciences (WP) at the Physics Institute of the University of Bern, which focused on historic earthquake data as a means of gauging current stress loading at Cajon Pass.
The study, published in the Journal ofGeophysical Research: Solid Earth, indicates tectonic stress levels that are now believed to exceed the highest seen during the years the team surveyed.
The “Earthquake Gate” at Cajon Pass
The researchers aimed to investigate stress that has slowly built along the San Andreas and San Jacinto faults and incorporated what they likened to an “earthquake gate” at Cajon Pass, which, in their models, functioned like a point of control that governed the size of earthquakes and whether they could spread to both systems.
For their research, they used a four-dimensional earthquake cycle model that allowed them to replicate certain processes both in spatial dimensions and across time.
Using a millennium of reconstructed earthquake data from the region based on geological information such as radiocarbon dates, unusual events recorded in dendrochronological data (i.e., information obtained from tree rings), and historical information sources, the team gave this to the model they devised.
Dr. Burkhard said the team’s simulation offered them a unique opportunity to better understand the ways stresses in the fault system build up over long periods of several centuries.
“By running the earthquake history of Southern California as a simulation, we can estimate the extent to which the fault system is already under stress today,” Dr. Burkhard said. The results of those simulations weren’t particularly promising either: according to Burkhard, current stress levels in the region are the highest they have been in 1,000 years, based on the data.
Concerning New Earthquake Data
The team also identified significant new information regarding the function of the so-called “earthquake gate” at Cajon Pass.
“The earthquake gate concept captures something important about how fault junctions work,” Burkhard said in a recent statement. “Cajon Pass doesn’t simply block or channel earthquakes: It responds to stress conditions, and those conditions change over centuries.”
Not only this, but Burkhard and her team also determined that a key element to these quakes involves not only the level of stress that accumulates at a single fault, but perhaps more significantly, the way stress between two systems can align. This is because, as the stress across a pair of faults rises together over longer periods, this appears to be most conducive to a large joint rupture comparable to the 1857 Fort Tejon earthquake.
Conversely, if stress levels are not in concert as they evolve, the team determined that this causes quakes that probably will not propagate beyond the junction.
In short, a more severe earthquake event today would entail a joint rupture that crosses the Cajon Pass, as opposed to one constrained either to the San Andreas or the San Jacinto Fault alone. Should such an event occur, it would likely impact one of the largest population centers, as well as a crucial infrastructure system that supplies energy and transportation to surrounding areas.
For Burkhard, “The question of when and how the next major earthquake will occur in this region is one of the most pressing problems in applied geoscience.” Based on the team’s findings, they say that their new modeling hopes to provide a much more complete picture of the science behind the factors that could lead to a major quake—conditions that could apply equally to other parts of the world as they do to California.
Burkhard adds that her team’s study is not intended merely as a prediction for when the next major earthquake could potentially occur, but also as a means of preparing for future quakes and mitigating their effects.
“What we can say is that the system is critically stressed and that physics-based models like ours give a clearer picture of the range of scenarios we should be prepared for,” Burkhard says. “This information is important for hazard assessment, infrastructure planning, and emergency preparedness.”
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.
A curious recent discovery has revealed a promising new underground archaeological find at the ancient site of Buto in Egypt’s Nile Delta.
Researchers who were testing a remote sensing technology designed to locate buried structures and other below-ground features reported the unique find earlier this year, which could be a previously undiscovered tomb or temple now believed to date as far back as 2,600 years.
The discovery was made at the Tell el-Fara’in site, more commonly known as Buto, which comprises the remains of an ancient city that thrived around 5,600 years ago during Egypt’s Predynastic period.
Origins of a Mystery
Buto underwent several periods of destruction and reassembly throughout its history, making it a significant focus of past archaeological work.
Some of the city’s oldest portions are currently entombed beneath several centuries’ worth of accumulated mud and soil, a factor that significantly complicates traditional excavations. To help them locate an ideal location for future excavation, the team employed an approach that combined SAR (Sentinel-1 GRD) satellite imagery with electrical resistivity tomography (ERT) measurements, which helped them pinpoint an ideal location to dig that would best enable an investigation of Buto’s settlement phases.
“Sentinel-1 (C-band) satellite imagery captured on May 5, 2018, was processed using SNAP software (version 9.0.0) to identify large-scale anomalies indicative of buried structures,” the team reports in a paper detailing their findings, which appeared in Applied Geophysics in March.
“Based on these detected anomalies, the locations for ERT profiles were strategically selected to maximize the likelihood of indicating significant subsurface features,” the team explained.
ERT technology is ideal for such carefully targeted excavation, since it relies on electrical currents placed into the ground, which researchers then use to collect data that helps them assemble a three-dimensional model of the buried structures. This imagery is generated based on differences in the way various materials either display electrical conductivity or resistance.
Buried Discoveries Emerge
Based on the team’s scans, the top three meters of the area revealed a distinctive layer of material, which the team judged to be broken pottery and debris—likely associated with Roman periods of occupation.
However, going further down in their scans, descending to a depth of approximately six meters, the team discovered something more intriguing: what appeared to be some kind of large buried structure.
Based on its depth, the team believes this unique structure is likely associated with the Saite period, which dates it to around 2,600 years ago. Although it remains unknown precisely what the structure is, or what its exact purpose may have been, one possibility is that it could be a large shrine, or even a tomb.
Uncovering Religious Artifacts
Following the initial discovery, the team undertook preliminary excavations of a small 10 x 10-meter area. This revealed walls constructed of mudbrick, as well as religious artifacts in locations that aligned with the team’s scans.
“The presence of a small offering basin along with numerous religious amulets depicting Egyptian deities such as Isis, Horus, Taweret, and Wadjet further supports the temple hypothesis,” the team writes in their study.
Above: According to the recent paper’s authors, the figure above shows a “3D map for the Kom C area, the full surveyed region by ERT, the successive layers of a vertical section for the excavated area, and some of the artefacts found in the excavated square.” (Image Credit: Abouarab, Elfadaly, et al./Applied Geophysics).
Also among the religious artifacts uncovered at the site were a “remarkable bronze amulet with a suspension hole, representing Horus the child” as well as amulets featuring a crouching lion, an amulet of Anubis, and the remains of limestone statues “in sexual positions” along with “a faience plaque with relief carvings of Hathor on both sides.”
However, the team reports that one of the most significant artifacts recovered from this area of the excavation was a steatite scarab bearing the name of King Thutmose III, which the team believes “may have functioned as an amulet or seal.”
“Collectively, these artefacts indicate the presence of a religious site with strong cultic and ceremonial associations, further reinforcing the interpretation of the structure as a temple from the 26th Dynasty,” the team says.
Ongoing Excavations
While still in the early phases, the team’s discoveries so far help to validate the geophysical and remote sensing techniques that made the discovery possible. “The results of this study demonstrate the effectiveness of combining geophysical measurements and remote sensing data,” the team writes, adding that they provided “a very accurate vision in detecting buried settlements in a complex region.”
“3D inversion algorithms were particularly effective in delineating buried mudbrick walls and architectural structures, significantly enhancing our understanding of site formation processes,” the researchers add.
Going forward, the team recommends further ERT surveys, which may help to reveal additional information about the site’s deepest occupation levels. For the time being, the team believes the evidence in hand points to the interpretation of the site and its features as an ancient temple, and that evidence points to the possibility that another may be located nearby.
“Our findings suggest that, in addition to the known temple, another temple may remain buried under a thick clay layer, which will be investigated through extensive measurements in forthcoming studies,” the team writes.
The recent paper, “Multi-scale detection of buried archaeological elements across different occupation phases: an integrated approach using radar satellite imagery and electric resistivity tomography at Buto, northwestern Nile Delta of Egypt,” appeared in Applied Geophysics on March 10, 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.
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