Extraordinary ClaimsClaim examination
Are We Living in a Simulation?
What a famous 2003 argument really claims, how scientists have tried to test the idea, and where science runs out.
EXTRAORDINARY CLAIMS CLAIM EXAMINATION
What U.S. government and NASA investigators found, what they still cannot explain, and what kind of data would help settle the rest.

THE SHORT ANSWER
They say most UAP turn out to be ordinary things, such as balloons, drones, birds, aircraft and satellites catching sunlight, once there is enough data. Hundreds of cases remain unresolved, mainly because the data are too poor to judge. The 2021 ODNI assessment, AARO's reports and NASA's 2023 study all found no evidence of alien technology.
The official reports say three main things. First, when there is enough data, most sightings turn out to be ordinary things: balloons, birds, drones, aircraft and sunlight glinting off satellites. Second, a smaller group of cases remains unexplained, usually because the data are too thin to judge. Third, none of these U.S. government reports, including NASA’s, has found evidence of alien technology.
UAP, short for “unidentified anomalous phenomena,” is the government’s term for what many people call UFOs. It now covers things reported in the air, in space and at sea. (In 2021 the “A” stood for “aerial.”) “Unidentified” means just that. It describes what we know, not what the object is. The reports treat these cases as a real safety and security issue, and they ask for better data, not less attention.
In June 2021, the Office of the Director of National Intelligence (ODNI) released a preliminary assessment. It looked at 144 reports from U.S. government sources, mostly military pilots, from 2004 to 2021. Its main conclusions:
The report also noted 11 reports of near misses between pilots and UAP. And it said that worry about their reputations may keep many witnesses silent, which makes the problem harder to study.
The Pentagon’s All-domain Anomaly Resolution Office, known as AARO, is now the lead federal office for resolving UAP cases. By law, it publishes yearly reports.
Its fiscal year 2024 report covered 757 reports received between May 2023 and June 2024. AARO resolved or queued for closure 292 cases, all of them ordinary objects such as balloons, birds, drones, satellites and aircraft. It flagged 21 cases with reported anomalous features for further study. It placed 444 cases in an “active archive” because they lacked enough data to analyze. The report stated plainly that AARO had found no evidence of extraterrestrial beings, activity or technology. It also noted two reports of flight-safety concerns and three reports of pilots being trailed or shadowed by UAP.
The fiscal year 2025 report covered June 2024 to May 2025. AARO received 319 new reports, and its total case holdings stood at 1,870. It resolved 114 of the new cases and 256 older ones. Every resolved case turned out to be something ordinary, including one commercial rocket launch and one person flying a jet pack. A new 3D modeling tool helped analysts match 238 reported UAP to satellite flaring: bright flashes of sunlight bouncing off a satellite, which can look like glowing orbs. AARO flagged nine cases for deeper study and moved 191 to the active archive. It received no reports of health effects and no reports of flight-safety concerns.
In March 2024, AARO released Volume I of a historical review. It examined U.S. government UAP investigations since 1945 and conducted about 30 interviews. It looked especially at claims that the government secretly recovered alien craft and was reverse-engineering them.
It found no evidence that any official investigation had ever confirmed a sighting as extraterrestrial technology. It found no evidence of secret reverse-engineering programs. In many cases, it said, people had heard of real but unrelated classified programs without having direct access to them. A metal sample said to come from a crashed spacecraft turned out to be a manufactured alloy, mostly magnesium, zinc and bismuth.
The report was also respectful in tone. It acknowledged that many people sincerely hold these beliefs, based on their own experiences or on sources they trust. It said its goal was to investigate carefully, not to prove or disprove any particular belief. It said a second volume would address further claims.
In September 2023, NASA published a report from an independent study team of 16 experts, chaired by astrophysicist David Spergel. The team did not re-investigate old cases. Its job was to ask how science could study UAP better.
Its central finding was about data. Analysis is held back by poorly calibrated sensors, too few simultaneous measurements, missing details about how data were recorded, and no baseline of what “normal” looks like. The team found no conclusive evidence in peer-reviewed science that UAP have an extraterrestrial origin. It said there was no reason to conclude that existing reports do.
Its recommendations were practical:
The team also pointed to the Aviation Safety Reporting System, a confidential system NASA runs for pilots and other aviation workers. It already receives about 100,000 reports a year.
Hundreds of cases are still open. As AARO describes them, active-archive cases lack the data needed to tell whether they behave like natural events or like something beyond known technology. AARO’s historical review judged that most unresolved cases would turn out ordinary with better data, but that is an expectation, not a finding.
A few cases stand out. The fiscal year 2025 report describes a Navy report off the coast of Virginia of roughly 100 airborne UAP and two surface craft that were likely uncrewed. AARO is still investigating it. Two reports described electronic interference near aircraft, with no conclusion yet. Some eyewitness accounts near sensitive sites suggested performance beyond known technology, but no technical data came with them.
Since May 2026, the Pentagon, now also called the Department of War, has posted batches of declassified records on its PURSUE website, following a presidential directive. Six batches had appeared by mid-September 2026. The site says these are unresolved cases, where the government cannot determine what was seen, for reasons that include too little data. It invites outside analysis from the private sector.
ODNI, AARO and NASA all point to the same need: better data. The strongest case would be an event recorded by several calibrated instruments at once, with exact times and locations. It would be checked against the normal background of aircraft, satellites and weather. And it would be released so independent scientists could test it. If such a case still showed abilities beyond known physics, that would be remarkable, and it would deserve serious study. If better data kept turning mysteries into satellites and balloons, that would be worth knowing too.
If you have seen something you could not explain, you are in good company, including military pilots. The most useful response is careful curiosity: note the time, place, direction and duration, and keep your original photo and video files, which often record the time and sometimes the location. For more on weighing a sighting, see Does an Unidentified Object Prove Aliens? and What Would Count as Evidence?. The bigger question of whether anyone else is out there is explored in Are We Alone in the Universe?
The sky still holds surprises. The best way to honor them is to keep looking, keep recording, and keep asking.
WHERE THE EVIDENCE STANDS
WORDS WORTH KNOWING
KEEP ASKING