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UFOs: how astronomers are searching the sky for alien probes near Earth

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Beatriz Villarroel, Stockholm University

There has been increased interest in unidentified flying objects (UFOs) ever since the Pentagon’s 2021 report revealed what appears to be anomalous objects in US airspace, dubbed unidentified aerial phenomena (UAP). Fast forward to 2023, and Nasa has already formed a panel to investigate the reports and appointed a director for UAP research.

A newly founded Pentagon desk has also released footage of mysterious metallic orbs. What is perhaps most remarkable is that David Grusch, a former intelligence officer, testified under oath before the US Congress, stating that he had interviewed around 40 people involved in secret programmes dealing with crashed UFOs.

I am interested in searching the sky for alien, physical objects which may one day tell us whether we are alone in the galaxy. Consider this: within our own Milky Way galaxy, there are 40 billion Earth-sized, potentially habitable planets.

Human ingenuity has enabled us to engineer and launch probes like Voyager and Pioneer, capable of reaching the closest stars. We’ve initiated efforts such as the Breakthrough Starshot programme which aims to reach nearby star Alpha Centauri in just a few decades by exploring innovative propulsion methods. Sending a probe may be more economical than sending out radio or laser communication if there is no need to hurry.

If humans can send a probe to another star, why couldn’t another civilisation send a probe to our Solar System? Such a probe could make it to the main asteroid belt and lurk on an asteroid.

Or, it could make its way to the Earth, entering our atmosphere. If observed, it would be branded as a “UFO”. A civilisation capable of producing and sending probes could dispatch millions of them on exploratory missions throughout our galaxy.

Some may argue that such probes could only exist if they adhere to the laws of physics and engineering as we understand them today. However, humanity is a relatively young civilisation, and our knowledge is constantly evolving.

While humans have dreamt of flying for millennia as we gazed at the skies, it has only been 120 years since the Wright brothers achieved the first powered flight. That’s about as long ago as Albert Einstein published his theory of special relativity.

Is it really so difficult to imagine that a civilisation that is hundreds of thousands years older than ours might have learned more about the laws of physics or developed a few more engineering tricks?

If a civilisation were to evolve into artificial intelligence (AI), it might survive for millions of years. This could mean it would casually regard slow to a neighbouring star as nothing more than a leisurely stroll.

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That said, few astronomers felt impressed by the US Navy videos or government reports. We need significantly better evidence and data than what has been presented so far.

Unveiling UFOs

How can we test whether there are extra terrestrial probes near Earth, and whether they can be tied to the possible UFO phenomenon? There are many options. Analysing materials from potentially crashed UFOs could give irrefutable proof. This would require state-of-the-art techniques to determine if these wrecks exhibit exotic or distinctly different characteristics of manufacture.

Obtaining such exotic samples, if they indeed exist, may prove challenging – they are rumoured to be in the hands of private companies. But newly proposed legislation might offer a solution to that problem in United States by mandating that all artificial materials from any non-human intelligence be surrendered to the US government.

In the projects I lead, we are searching for artificial non-human objects by looking for short light flashes in the night sky. Short flashes typically occur when a flat, highly reflective surface — such as a mirror or glass — reflects sunlight. It could, however, also result from an artificial object emitting its own internal light.

Such short light flashes sometimes repeat and follow a straight line as the object tumbles in space during its orbit around the Earth. This is why satellites often appear as repeating light flashes in images.

Historical photographic plates taken before the launch of Sputnik 1 in 1957 have revealed the presence of nine light sources (transients) that appear and vanish within an hour in a small image, defying astronomical explanations. In some cases, the transient light sources are even aligned, just like when short flashes come from moving objects.

Image of the three disappearing stars.
The three disappearing stars. [Edited, higher-resolution version of Fig 2 in paper by Solano et al. (2023)(https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stad3422/7457759)], CC BY

The most recent finding of this kind shows three bright stars in an image dated July 19, 1952 (coincidentally, the same time as the famous Washington UFO flyovers). The three stars were never seen again.

Searching for alien probes in the modern night sky presents a serious but necessary challenge. A new research programme, known as ExoProbe, searches for short light flashes from potential alien objects with the help of multiple telescopes.

To verify the authenticity of each flash, it must be observed in at least two different telescopes. Since these telescopes are separated by hundreds of kilometres, any light flash caused by an object within the inner Solar System enables the measurement of parallax — the apparent shift in the position of an object as seen from two different points — and the calculation of the distance to the object.

The ExoProbe project also uses its own methods to filter out light flashes from the millions of space debris fragments and thousands of satellites cluttering the sky. By adding a telescope taking real-time spectra (the wavelength distributions of the light) of the objects in a wide field, you can analyse the transients before they vanish into nothingness.

Finally, increasing the number of telescopes further enhances accuracy in measuring parallax and determining the actual three dimensional location of the object. Ultimately, the goal is to identify any potential alien object and bring it back to Earth for further study.

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Some 60 years of searches for extraterrestrial civilisations in the radio frequencies have yielded no candidates whatsoever. We find ourselves at a moment in time when new paths must be explored. That means we can finally focus our attention closer to home. Regardless of the outcome, this journey is certainly an homage to our insatiable curiosity.

Beatriz Villarroel, Assistant professor of Physics, Stockholm University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/


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Why the chemtrail conspiracy theory lingers and grows – and why Tucker Carlson is talking about it

The chemtrail conspiracy theory has surged despite being thoroughly debunked. Learn why people believe contrails are chemical weapons, how Tucker Carlson amplified the theory, and what psychology reveals about conspiracy thinking and our need for control.

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Why the chemtrail conspiracy theory lingers and grows – and why Tucker Carlson is talking about it
Contrails have a simple explanation, but not everyone wants to believe it. AP Photo/Carolyn Kaster

Why the chemtrail conspiracy theory lingers and grows – and why Tucker Carlson is talking about it

Calum Lister Matheson, University of Pittsburgh Everyone has looked up at the clouds and seen faces, animals, objects. Human brains are hardwired for this kind of whimsy. But some people – perhaps a surprising number – look to the sky and see government plots and wicked deeds written there. Conspiracy theorists say that contrails – long streaks of condensation left by aircraft – are actually chemtrails, clouds of chemical or biological agents dumped on the unsuspecting public for nefarious purposes. Different motives are ascribed, from weather control to mass poisoning. The chemtrails theory has circulated since 1996, when conspiracy theorists misinterpreted a U.S. Air Force research paper about weather modification, a valid topic of research. Social media and conservative news outlets have since magnified the conspiracy theory. One recent study notes that X, formerly Twitter, is a particularly active node of this “broad online community of conspiracy.” I’m a communications researcher who studies conspiracy theories. The thoroughly debunked chemtrails theory provides a textbook example of how conspiracy theories work.

Boosted into the stratosphere

Conservative pundit Tucker Carlson, whose podcast averages over a million viewers per episode, recently interviewed Dane Wigington, a longtime opponent of what he calls “geoengineering.” While the interview has been extensively discredited and mocked in other media coverage, it is only one example of the spike in chemtrail belief. Although chemtrail belief spans the political spectrum, it is particularly evident in Republican circles. U.S. Secretary of Health and Human Services Robert F. Kennedy Jr. has professed his support for the theory. U.S. Rep. Marjorie Taylor Greene of Georgia has written legislation to ban chemical weather control, and many state legislatures have done the same. Online influencers with millions of followers have promoted what was once a fringe theory to a large audience. It finds a ready audience among climate change deniers and anti-deep state agitators who fear government mind control.

Heads I win, tails you lose

Although research on weather modification is real, the overwhelming majority of qualified experts deny that the chemtrail theory has any solid basis in fact. For example, geoengineering researcher David Keith’s lab posted a blunt statement on its website. A wealth of other resources exist online, and many of their conclusions are posted at contrailscience.com. But even without a deep dive into the science, the chemtrail theory has glaring logical problems. Two of them are falsifiability and parsimony.
The philosopher Karl Popper explains that unless your conjecture can be proved false, it lies outside the realm of science.
According to psychologist Rob Brotherton, conspiracy theories have a classic “heads I win, tails you lose” structure. Conspiracy theorists say that chemtrails are part of a nefarious government plot, but its existence has been covered up by the same villains. If there was any evidence that weather modification was actually happening, that would support the theory, but any evidence denying chemtrails also supports the theory – specifically, the part that alleges a cover-up. People who subscribe to the conspiracy theory consider anyone who confirms it to be a brave whistleblower and anyone who denies it to be foolish, evil or paid off. Therefore, no amount of information could even hypothetically disprove it for true believers. This denial makes the theory nonfalsifiable, meaning it’s impossible to disprove. By contrast, good theories are not false, but they must also be constructed in such a way that if they were false, evidence could show that. Nonfalsifiable theories are inherently suspect because they exist in a closed loop of self-confirmation. In practice, theories are not usually declared “false” based on a single test but are taken more or less seriously based on the preponderance of good evidence and scientific consensus. This approach is important because conspiracy theories and disinformation often claim to falsify mainstream theories, or at least exploit a poor understanding of what certainty means in scientific methods. Like most conspiracy theories, the chemtrail story tends not to meet the criteria of parsimony, also known as Occam’s razor, which suggests that the more suppositions a theory requires to be true, the less likely it actually is. While not perfect, this concept can be an important way to think about probability when it comes to conspiracy theories. Is it more likely that the government is covering up a massive weather program, mind-control program or both that involve thousands or millions of silent, complicit agents, from the local weather reporter to the Joint Chiefs of Staff, or that we’re seeing ice crystals from plane engines? Of course, calling something a “conspiracy theory” does not automatically invalidate it. After all, real conspiracies do exist. But it’s important to remember scientist and science communicator Carl Sagan’s adage that “extraordinary claims require extraordinary evidence.” In the case of chemtrails, the evidence just isn’t there.
Scientists explain how humans are susceptible to believing conspiracy theories.

Psychology of conspiracy theory belief

If the evidence against it is so powerful and the logic is so weak, why do people believe the chemtrail conspiracy theory? As I have argued in my new book, “Post-Weird: Fragmentation, Community, and the Decline of the Mainstream,” conspiracy theorists create bonds with each other through shared practices of interpreting the world, seeing every detail and scrap of evidence as unshakable signs of a larger, hidden meaning. Uncertainty, ambiguity and chaos can be overwhelming. Conspiracy theories are symptoms, ad hoc attempts to deal with the anxiety caused by feelings of powerlessness in a chaotic and complicated world where awful things like tornadoes, hurricanes and wildfires can happen seemingly at random for reasons that even well-informed people struggle to understand. When people feel overwhelmed and helpless, they create fantasies that give an illusion of mastery and control. Although there are liberal chemtrail believers, aversion to uncertainty might explain why the theory has become so popular with Carlson’s audience: Researchers have long argued that authoritarian, right-wing beliefs have a similar underlying structure. On some level, chemtrail theorists would rather be targets of an evil conspiracy than face the limits of their knowledge and power, even though conspiracy beliefs are not completely satisfying. Sigmund Freud described a fort-da (“gone-here”) game played by his grandson where he threw away a toy and dragged it back on a string, something Freud interpreted as a simulation of control when the child had none. Conspiracy theories may serve a similar purpose, allowing their believers to feel that the world isn’t really random and that they, the ones who see through the charade, really have some control over it. The grander the conspiracy, the more brilliant and heroic the conspiracy theorists must be. Conspiracies are dramatic and exciting, with clear lines of good and evil, whereas real life is boring and sometimes scary. The chemtrail theory is ultimately prideful. It’s a way for theorists to feel powerful and smart when they face things beyond their comprehension and control. Conspiracy theories come and go, but responding to them in the long term means finding better ways to embrace uncertainty, ambiguity and our own limits alongside a new embrace of the tools we do have: logic, evidence and even humility. Calum Lister Matheson, Associate Professor of Communication, University of Pittsburgh This article is republished from The Conversation under a Creative Commons license. Read the original article.

Dive into “The Knowledge,” where curiosity meets clarity. This playlist, in collaboration with STMDailyNews.com, is designed for viewers who value historical accuracy and insightful learning. Our short videos, ranging from 30 seconds to a minute and a half, make complex subjects easy to grasp in no time. Covering everything from historical events to contemporary processes and entertainment, “The Knowledge” bridges the past with the present. In a world where information is abundant yet often misused, our series aims to guide you through the noise, preserving vital knowledge and truths that shape our lives today. Perfect for curious minds eager to discover the ‘why’ and ‘how’ of everything around us. Subscribe and join in as we explore the facts that matter.  https://stmdailynews.com/the-knowledge/


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The Kingman UFO Crash of 1953: Fact, Fiction, or Cold War Legend?

Explore the mystery of the 1953 Kingman UFO crash. From rumors of wreckage taken to Area 51 to claims of an alien named “J-Rod,” this Cold War story remains one of UFO history’s most debated legends.

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Last Updated on October 11, 2025 by Daily News Staff

In the spring of 1953, the quiet desert town of Kingman, Arizona, became the center of one of UFO history’s most debated mysteries. At the height of the Cold War, witnesses claimed that something unusual fell from the desert sky. What followed has fueled speculation for decades—connecting the small Arizona town to America’s most secretive base, Area 51.

Kingman UFO Crash

The Crash in the Desert

According to reports, an unidentified craft was said to have crashed near Kingman in May 1953. Local accounts suggested that the U.S. military quickly secured the site, transporting the wreckage under tight secrecy. For years, however, this alleged event remained little more than rumor, blending into the larger backdrop of Cold War fears and secrecy.

Area 51 and the Alleged Cover-Up

The story took on new life when claims surfaced that the wreckage had been moved to Area 51, the highly restricted military base in Nevada long associated with UFO lore. At the time, the base itself was shrouded in secrecy, making it fertile ground for speculation about what the government might be hiding.

Kingman UFO Crash

Bill Uhouse and “J-Rod”

The most astonishing claims didn’t appear until 1998, when retired military engineer Bill Uhouse stepped forward. Uhouse alleged that the U.S. government not only recovered alien technology but also encountered a living extraterrestrial being. He referred to this being as “J-Rod” and claimed it worked alongside American scientists to unlock the secrets of advanced propulsion systems.

If true, this collaboration would mark one of the most extraordinary events in modern history—bridging human science with extraterrestrial knowledge. Skeptics, however, point out the lack of verifiable evidence and suggest the story may be a product of Cold War imagination.

A Mystery That Endures

Like many UFO stories from the mid-20th century, the Kingman crash remains steeped in uncertainty. Did a spacecraft really come down in the Arizona desert? Was J-Rod a real extraterrestrial presence, or simply another chapter in the long saga of Cold War secrecy and speculation?

What is certain is that the Kingman UFO crash continues to spark curiosity, debate, and fascination—reminding us of how the lines between history, myth, and mystery can blur.


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The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/

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Fire in the Sky vs. Travis Walton’s Testimony: What Really Happened?

Discover the truth behind Fire in the Sky vs. Travis Walton’s real testimony. Learn what really happened during the 1975 UFO abduction and what Hollywood changed for the movie.

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Last Updated on October 6, 2025 by Daily News Staff

Fire in the Sky

When Travis Walton vanished from an Arizona forest in 1975, the world was stunned. His story of being struck by a beam of light from a UFO and later reappearing after five days became one of the most famous alien abduction cases in history. Nearly two decades later, Hollywood brought his story to the big screen in the 1993 film Fire in the Sky.

But how much of the movie matched Walton’s actual testimony?

The Real Testimony: Travis Walton’s Experience

In Walton’s own words, detailed in his book The Walton Experience:

He and six coworkers saw a glowing disc-shaped UFO while driving through the Apache-Sitgreaves National Forest. Walton approached and was struck by a beam of light, vanishing before their eyes. He later recalled waking inside a clean, metallic room. He first encountered short, large-eyed beings — similar to the classic “greys.” After panicking, he was met by taller, human-like beings who guided him silently through the craft. He blacked out again and awoke days later on the roadside as the UFO departed.

Walton’s description was eerie and confusing, but not grotesque.

The Hollywood Version: Fire in the Sky (1993)

The film’s abduction sequence became infamous for its nightmarish visuals:

Walton awakens in a slimy cocoon-like environment, unlike the clean metallic room he described. He discovers corpses wrapped in membranes — a pure Hollywood invention. The aliens are depicted as grotesque, insect-like creatures rather than the greys or human-like beings Walton reported. Walton is violently restrained on a table while aliens perform invasive procedures, including a chilling needle-to-the-eye scene.

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The movie leaned heavily into horror, turning Walton’s mysterious account into a terrifying cinematic ordeal.

What Was Real vs. Fiction

Accurate in the Film:

Walton struck by a beam of light and vanishing. His coworkers sticking to their story and passing polygraphs. Walton reappearing days later, shaken and disoriented.

Invented for Hollywood:

Cocoon-like interiors and human corpses. Alien torture and invasive experiments. Insect-like, monstrous alien designs. The extreme horror atmosphere.

Walton’s View

Travis Walton himself has stated that while Fire in the Sky captured the drama of his disappearance, it distorted the abduction itself. He called the film’s alien sequence “Hollywood horror” and emphasized that his real experience, though frightening, was not sadistic or grotesque.

The Lasting Legacy

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Today, the Travis Walton UFO incident remains one of the most debated abduction cases ever. Fire in the Sky introduced the story to millions but also blurred the line between fact and fiction. For Walton, the truth was strange enough — and far less like a nightmare than Hollywood imagined.

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