unknown
UFOs: how astronomers are searching the sky for alien probes near Earth
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.
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.
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.
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.
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The Unfavorable Semicircle Mystery: The YouTube Channel That Uploaded Tens of Thousands of Cryptic Videos
In 2015, the YouTube channel Unfavorable Semicircle gained attention for its enigmatic and abundant video uploads, totaling over 70,000 before its deletion in 2016. Theories about its purpose vary, from automated content generation to digital art experimentation, leaving its intent unresolved.
In the vast digital landscape of the internet, strange phenomena occasionally emerge that leave investigators, tech enthusiasts, and everyday viewers scratching their heads. One of the most puzzling cases appeared in 2015, when a mysterious YouTube channel called Unfavorable Semicircle began uploading an astonishing number of cryptic videos.
Within months, the channel had published tens of thousands of bizarre clips, many of which seemed random, incomprehensible, and visually chaotic. But as internet detectives began analyzing the content more closely, they discovered that these videos might not have been random at all.
The Sudden Appearance of an Internet Mystery
The Unfavorable Semicircle channel reportedly appeared in March 2015, with its first uploads arriving in early April.
Almost immediately, the channel began publishing videos at an incredible pace. Observers estimated that the account uploaded thousands of videos per week, sometimes multiple videos per minute. By the time the channel disappeared in early 2016, researchers believed it had uploaded well over 70,000 videos, possibly far more.
The scale alone made the project seem impossible for a human to manage manually.
Strange Visuals and Cryptic Titles
Most of the videos shared similar characteristics:
- Extremely short or very long runtime
- Abstract visuals such as flashing colors, static, or distorted imagery
- Little or no audio, or heavily distorted sounds
- Titles made of random characters, symbols, or numbers
To casual viewers, the videos looked like pure digital noise. However, online investigators suspected something more deliberate was happening.
Hidden Images Discovered
The mystery deepened when researchers began extracting individual frames from some videos.
When thousands of frames from certain clips were stitched together, the results sometimes formed coherent images. One of the most famous examples involved a video titled “LOCK.” While the footage appeared chaotic at first, combining the frames revealed a recognizable composite image.
This discovery suggested the videos were carefully constructed rather than random uploads.
Theories About the Channel’s Purpose
Because the creator never explained the project, several theories emerged across Reddit, YouTube, and internet forums.
Automated Experiment
Many believe the channel was created using automated software that generated and uploaded content at scale.
Alternate Reality Game (ARG)
Some viewers suspected the channel might be part of a hidden puzzle or digital scavenger hunt.
Encrypted Communication
Others compared the channel to Cold War “numbers stations,” suggesting the videos could contain coded messages.
Digital Art Project
Another theory suggests the channel was an experimental art project exploring algorithms, data, and visual noise.
Despite years of investigation, no single explanation has been confirmed.
Why the Channel Disappeared
In February 2016, YouTube removed the channel, reportedly due to spam or automated activity violations.
By that time, the channel had already become a minor internet legend. Fortunately, some researchers managed to archive a large portion of the videos before they disappeared.
Even today, archived clips continue to circulate online as investigators attempt to decode them.
Other Mysterious YouTube Channels
The Unfavorable Semicircle mystery is not the only strange case on YouTube.
One well-known example is Webdriver Torso, a channel that uploaded hundreds of thousands of videos showing red and blue rectangles with simple beeping sounds. Internet speculation ran wild before Google eventually confirmed it was an internal YouTube testing account.
Another example is AETBX, which posts distorted visuals and unusual audio that some viewers believe contain hidden patterns or encoded information.
These cases highlight how automation, experimentation, and creativity can sometimes blur the line between technology and mystery.
A Digital Mystery That Remains Unsolved
Nearly a decade later, the true purpose behind Unfavorable Semicircle remains unknown.
Was it a sophisticated experiment? A piece of algorithmic art? Or simply an automated test that accidentally captured the internet’s imagination?
Whatever the explanation, the channel stands as a reminder that even in a world filled with billions of videos and endless information, the internet can still produce mysteries that challenge our understanding of technology.
Why Internet Mysteries Still Fascinate Us
Stories like Unfavorable Semicircle capture attention because they combine technology, creativity, and the unknown. They invite people from around the world to collaborate, analyze patterns, and search for meaning hidden in the noise.
And sometimes, the most intriguing part of the mystery is that the answer may never fully be known.
Related Coverage & Further Reading
- Atlas Obscura – The Unsettling Mystery of the Creepiest Channel on YouTube
- Her Campus – Top 5 Most Obscure Internet Mysteries
- Medium – Unfavorable Semicircle: The YouTube Mystery No One Can Solve
- Gazette Review – Top 10 Strangest YouTube Channels Ever
- Decoding the Unknown – Unfavorable Semicircle YouTube Mystery Archive
- Wikipedia – Unfavorable Semicircle
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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Last Updated on February 28, 2026 by Daily News Staff
For decades, the idea of aliens visiting Earth has lived in a cultural no-man’s-land: too fascinating to ignore, too stigmatized to study seriously, and too easy to dismiss with a joke. But that posture has shifted in a measurable way over the past several years.
Physicist Kevin Knuth (University at Albany, SUNY) argued in a 2018 essay for The Conversation that the question of whether some UFO reports could represent something truly unknown is worthy of serious scientific study — not because we have proof of extraterrestrials, but because a small portion of cases appear to resist easy explanation and involve trained observers, multiple sensors, or unusual performance claims.
Article: https://theconversation.com/are-we-alone-the-question-is-worthy-of-serious-scientific-study-98843
That argument gained new oxygen in late 2017, when The New York Times reported that the U.S. Department of Defense had funded a program known as the Advanced Aerospace Threat Identification Program (AATIP). The reporting described roughly $22 million spent to examine military reports of unusual aerial incidents. Former Pentagon official Luis Elizondo became a central public figure in the story, saying he left his role amid frustration over secrecy and limited support for deeper investigation.
Around the same time, the Pentagon confirmed and released several now-famous military videos showing encounters recorded on forward-looking infrared (FLIR) systems from Navy aircraft — clips that reignited public debate and pushed the topic out of late-night-TV territory and into mainstream news.
What we’ve learned since (2018–2026)
The biggest “update” since your original post isn’t a single smoking gun. It’s the fact that the U.S. government and scientific institutions have increasingly treated the issue as a data and airspace-safety problem—and, potentially, a national security one.
A few key developments:
- The language changed: “UFO” has increasingly been replaced by UAP (Unidentified Anomalous Phenomena), a term meant to reduce stigma and widen the scope beyond “flying saucers.”
- Regular reporting became normalized: The Office of the Director of National Intelligence (ODNI) has issued public-facing UAP reporting in recent years, and the Department of Defense has continued formal tracking through dedicated offices.
- NASA stepped in: NASA convened an independent UAP study team, releasing a final report in 2023 that emphasized something simple but important: if you want answers, you need better data, consistent reporting standards, and transparent methods. (NASA’s stance was not “aliens confirmed,” but “this is a legitimate area for structured inquiry.”)
The Carl Sagan test still applies
Carl Sagan’s line remains the guardrail here:
“Extraordinary claims require extraordinary evidence.”
In other words: eyewitness testimony alone — even sincere testimony — isn’t enough. A personal story, a viral clip, or even a dramatic encounter doesn’t automatically equal proof of extraterrestrial visitation. If the claim is “non-human intelligence is visiting Earth,” the evidence has to be strong enough to survive serious scrutiny: repeatable analysis, multi-sensor confirmation, chain-of-custody, and independent review.
So where does that leave us?
If you strip away the hype, the most reasonable position in 2026 looks something like this:
- Something is being observed in a small percentage of cases that isn’t immediately identifiable.
- That does not automatically mean “aliens.”
- But it does mean the topic is no longer intellectually off-limits the way it once was.
After leaving AATIP-related work, Elizondo became associated with To The Stars Academy of Arts & Science, a group founded by musician Tom DeLonge that aimed to blend public interest, aerospace ideas, and advocacy for further investigation. Whether you view that effort as serious research, public outreach, or a media-adjacent project, it reflects the broader reality: the conversation has moved from fringe forums into public institutions.
The next step shouldn’t be louder claims. It should be better instrumentation, better reporting, and better science—because if there’s a prosaic explanation, rigorous study will reveal it. And if there’s something genuinely novel in the data, that’s exactly what science is for.
More STM Daily News science coverage: https://stmdailynews.com/category/science/
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Former President Barack Obama recently sparked headlines, social media debates, and a fresh wave of UFO chatter after a brief remark during a podcast interview. The comment quickly ricocheted across news outlets, with many asking: Did Obama just confirm aliens exist? And just as quickly, Donald Trump weighed in.
Let’s unpack what was actually said — and what it means.
🎙️ The Comment That Ignited the Conversation
During a rapid-fire question segment on a podcast hosted by Brian Tyler Cohen, Obama was asked directly:
“Are aliens real?”
Obama’s response:
“They’re real, but I haven’t seen them.”
That short answer fueled immediate speculation. Clips spread online, often stripped of context, with some interpreting the statement as a bombshell confirmation of extraterrestrial life.
🧠 What Obama Meant
Soon after the comment gained traction, Obama clarified his meaning.
His explanation aligned with a position he’s expressed before:
✔ He was referring to the statistical likelihood of life elsewhere in the universe
✔ He was not claiming evidence of alien visitation
✔ He emphasized that during his presidency he saw no proof of extraterrestrial contact
In other words:
Obama was speaking philosophically and scientifically — not revealing classified information.
This interpretation matches mainstream scientific thinking: given the size of the universe, life beyond Earth is plausible, but confirmed evidence remains elusive.
🛸 Why the Comment Resonated
The remark landed in a cultural moment where:
• Interest in UAPs (Unidentified Aerial Phenomena) is high
• Government transparency around UFO reports has increased
• Space exploration discoveries (exoplanets, water worlds) dominate science news
Even a casual statement from a former president can ignite intense discussion.
🇺🇸 Trump’s Reaction
Former (and current political figure) Donald Trump responded critically.
Trump characterized Obama’s comment as:
• A “mistake”
• Potentially involving “classified information”
He also reiterated his own stance:
He does not know whether aliens are real.
Trump pivoted the conversation toward disclosure, suggesting he would support or consider declassifying UFO/UAP-related files — a theme that has periodically surfaced in political rhetoric.
⚖️ Politics vs Interpretation
Trump’s reaction highlights how statements about extraterrestrial life often become political flashpoints, even when the original comment is speculative or philosophical.
Key distinction:Obama’s Clarification Public Interpretation Life elsewhere is likely “Obama confirmed aliens” No evidence of contact “Government disclosure”
🔬 The Scientific Reality
Organizations like NASA and the broader research community maintain:
✅ Life beyond Earth → statistically plausible
❓ Intelligent civilizations → unknown
❌ Confirmed alien contact → no verified evidence
Investigations into UAPs consistently conclude:
• Most sightings have conventional explanations
• Some remain unresolved due to limited data
• None confirmed as extraterrestrial craft
🌌 Why These Stories Keep Captivating Us
Conversations about aliens sit at the intersection of:
✨ Science
🧠 Curiosity
🛸 Mystery
🎭 Pop culture
🏛️ Politics
When a former president comments, the intrigue multiplies.
📌 Bottom Line
Did Obama say aliens are real?
Yes — but in the sense that life elsewhere in the universe is likely, not that aliens are visiting Earth.
Did he claim evidence?
No.
Trump’s response?
Critical, skeptical, and framed around classification and disclosure.
If you’re fascinated by this topic, you might also enjoy exploring:
• How scientists search for alien life
• What counts as real “evidence”
• Why UFO sightings are so often misinterpreted
Want me to craft a follow-up article like “How Close Are We to Discovering Alien Life?” 🚀👽
Related Links & Further Reading
- NASA – Search for Life
- NASA – Exoplanet Exploration
- SETI Institute – Search for Extraterrestrial Intelligence
- U.S. Department of Defense – UAP Reports
- How Close Are We to Discovering Alien Life?
- What Are UAPs? Explained
- A Brief History of UFO Investigations
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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