Debunked: Conspiracy Theories the Evidence Contradicts
Debunked The weight of the cited evidence contradicts the claim. Deliberate parodies, such as Birds Aren't Real, are also rated Debunked and carry a note saying they are satire.
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- "Avril Is Dead": The Lookalike Hoax
A long-running internet rumor claims that singer Avril Lavigne was replaced by a lookalike named 'Melissa' in the early 2000s. Lavigne is alive and has called it 'just a dumb internet rumor.'
- 'Eat Popcorn, Drink Coke': The Subliminal Advertising Hoax
In 1957, market researcher James Vicary claimed that flashing 'Eat Popcorn' and 'Drink Coke' on a movie screen had increased snack sales. The claim set off a national panic about subliminal mind control. Vicary later admitted the study was a fabrication, according to psychologist Anthony Pratkanis.
- 9/11 Was an Inside Job
The '9/11 inside job' theory holds that the U.S. government planned or knowingly allowed the September 11, 2001 attacks, and that the World Trade Center buildings were destroyed by controlled demolition. The 9/11 Commission found the attacks were carried out by 19 hijackers 'acting at the behest of Islamist extremists headquartered in distant Afghanistan.' The National Institute of Standards and Technology (NIST) found 'no corroborating evidence' of explosives in the Twin Towers and concluded that fires brought down Building 7.
- Birds Aren't Real (satire)
A deliberate parody conspiracy theory claiming that birds are government surveillance drones. Its founder, Peter McIndoe, has said publicly that it is satire.
- Chemtrails
The 'chemtrails' theory says the long white trails behind aircraft are chemicals sprayed on purpose. Government agencies and atmospheric scientists say they are contrails, ice clouds formed from engine exhaust. In a 2016 peer-reviewed survey, 76 of 77 experts said they had found no evidence of a secret spraying program.
- Denver International Airport: Bunkers, Murals and 'Blucifer'
Denver International Airport has been the subject of claims about secret underground bunkers, sinister murals, a 'demonic' horse statue and links to a 'New World Order.' The Denver Public Library's archivists have traced each claim to an ordinary explanation.
- Did Hitler Escape to Argentina?
A long-running theory says Adolf Hitler faked his death in Berlin in 1945 and fled by submarine to Argentina, where he lived for decades. Postwar FBI and CIA files do record such tips, but none was ever confirmed. A 2018 scientific study of his teeth concluded he died in Berlin in 1945.
- Die Glocke and the Nazi Moon Base
Popular stories claim the Nazis built a bell-shaped antigravity device called 'Die Glocke' and even reached the Moon. No record supports either. The Bell in its modern form comes from books published around 2000, more than 50 years after the war.
- Elvis Is Alive: The King Who Never Left
The claim that Elvis Presley faked his death in 1977 and went into hiding. It rests on sightings and supposed clues, none of which has held up.
- Finland Doesn't Exist: A Reddit Joke That Spread (satire)
A joke posted on Reddit claimed that Finland is a fiction created by Japan and Russia to hide fishing in the Baltic Sea. Its author says he does not believe it. Finland is, of course, a real country.
- Flat Earth
The belief that the Earth is a flat disc, not a globe, and that scientists and governments are hiding the truth.
- Fluoride in the Water as Mind Control
Since U.S. community water fluoridation began in the 1940s, some opponents have claimed it is a plot, from a Cold War-era Communist scheme to a Nazi method for keeping prisoners docile. Fact-checkers have found no evidence for the mind-control story. Real scientific debate over fluoride levels and health effects is a separate issue.
- HAARP: Weather Weapon or Radio Research?
HAARP, a field of 180 radio antennas near Gakona, Alaska, has been blamed online for storms, earthquakes and mind control. The University of Alaska Fairbanks, which has run it since 2015, says it is 'basically a large radio transmitter' for studying the ionosphere, and that its radio waves are not absorbed in the layers of the atmosphere where weather happens.
- Hollow Earth: Worlds Beneath Our Feet
The idea that Earth is hollow, open at the poles and perhaps inhabited inside, goes back centuries and once had serious supporters. Measurements of Earth's density, and the study of earthquake waves, show that the planet is solid with a dense core.
- Is Tupac Shakur Still Alive?
Rapper Tupac Shakur was shot in Las Vegas in September 1996 and died six days later. Ever since, rumors have claimed he faked his death and is living in hiding. In August 2026, a Las Vegas jury convicted a man of his murder. ABC News reports that the man has said he plans to appeal.
- Majestic 12: The UFO Documents the Air Force Called 'Completely Bogus'
Majestic 12, or MJ-12, is said to be a top-secret committee President Truman set up to handle a crashed flying saucer. The papers that describe it surfaced among UFO researchers in the 1980s. When copies reached the FBI in 1988, the Bureau's own file records the Air Force Office of Special Investigations calling the document 'completely bogus.'
- Moon Landing Hoax
The claim that NASA faked the Apollo Moon landings (1969 to 1972) on Earth. NASA's records, the lunar samples and later orbital images of the landing sites all contradict it.
- Nibiru: The Doomsday Planet That Keeps Not Arriving
Nibiru, or Planet X, is said to be a hidden planet on a long orbit that will one day swing past or smash into Earth. Its predicted arrival dates have come and gone. Astronomers say a planet that close would be easy to see, and an all-sky infrared survey found no large hidden planet.
- Oklahoma City Bombing: The 'Second Bomb' Theory
On 19 April 1995, a truck bomb destroyed much of the Alfred P. Murrah Federal Building in Oklahoma City and killed 168 people. Timothy McVeigh was convicted and executed. Some critics have argued that extra explosives inside the building were involved. U.S. Geological Survey scientists found that the seismic signals cited as proof of a second blast are consistent with a single explosion.
- Operation Highjump: Did Admiral Byrd Battle a Nazi Base in Antarctica?
In 1946–47 the U.S. Navy sent a large expedition, Operation Highjump, to Antarctica. A popular theory says it was really a mission to destroy a secret Nazi base. A 2007 peer-reviewed study concluded there was no such base and that Highjump was designed to train the Navy for a possible war with the Soviet Union in the Arctic.
- Paul Is Dead
An urban legend that Paul McCartney died in 1966 and was secretly replaced by a lookalike, with clues supposedly hidden in Beatles records.
- Polybius: The Arcade Game That Never Was
The legend says a mysterious arcade game called Polybius appeared in Portland, Oregon, in 1981, caused nightmares and seizures, and was watched by men in black suits before vanishing. No cabinet, code or contemporary record has ever been found. The story seems to have grown out of real but ordinary local news.
- Roswell Incident
The belief that a flying saucer crashed near Roswell, New Mexico, in 1947 and that the military recovered alien bodies. Air Force reports in 1994 and 1997 traced the debris to a secret balloon project and the 'bodies' to later test dummies and accidents.
- TWA Flight 800: Missile Strike or Fuel Tank Explosion?
On July 17, 1996, TWA Flight 800 broke apart off Long Island minutes after leaving New York, killing all 230 people aboard. Many witnesses described a streak of light, and missile theories followed. After a four-year investigation, the NTSB found that the center wing fuel tank exploded and that no wreckage showed damage from a bomb or missile. In 2014 it denied a petition to reopen the case.
- Tartaria and the 'Mud Flood': The Lost Empire Behind Old Buildings
An online theory claims that an advanced global empire called Tartaria built the world's grand 19th-century architecture, and that a cataclysmic 'mud flood' erased it from history. Architecture writers say the theory rests on basic misunderstandings of how buildings are made.
- The Bermuda Triangle
The Bermuda Triangle is a stretch of the western North Atlantic where ships and planes are said to vanish mysteriously. NOAA says 'There is no evidence that mysterious disappearances occur with any greater frequency in the Bermuda Triangle than in any other large, well-traveled area of the ocean.'
- The Black Knight Satellite
Believers say an alien satellite called the 'Black Knight' has orbited Earth for thousands of years. The legend stitches together unrelated stories. Its most famous photos come from the 1998 STS-88 shuttle mission, and the object in them is identified as a thermal cover lost during a spacewalk.
- The Death of Princess Diana: What the Investigations Found
Diana, Princess of Wales, died in a Paris car crash in 1997. Murder allegations, most prominently from Mohamed Al Fayed, were examined by a Metropolitan Police inquiry and a British inquest. Paget concluded there was no conspiracy to murder, and the 2008 inquest jury found the deaths were caused by the gross negligence of the driver and the following paparazzi.
- The Kennedy Curse
The Kennedy family has suffered a long series of early and violent deaths, from wartime plane crashes to two assassinations. That has led to talk of a family 'curse.' Biographers and official investigators point instead to war, assassins, risk-taking and accidents with known causes.
- The Loch Ness 'Surgeon's Photo': A Toy Submarine
The most famous picture of the Loch Ness Monster, the 1934 'Surgeon's Photograph,' was revealed in 1994 to be a hoax using a toy submarine fitted with a model head and neck.
- The Mothman and the Silver Bridge Collapse
In 1966 and 1967, people around Point Pleasant, West Virginia, reported a large winged creature with glowing red eyes, which became known as 'Mothman.' When the town's Silver Bridge collapsed in December 1967, killing 46 people, the two stories were later linked. The NTSB found that the collapse was caused by a fractured eyebar in one of the bridge's suspension chains.
- The Phantom Time Hypothesis: Were 300 Years Invented?
German writer Heribert Illig has argued that about 297 years of the early Middle Ages, AD 614 to 911, never happened and were invented. Historians reject the idea, pointing to astronomical records, tree-ring and radiocarbon dating, and the real reason for the 1582 calendar correction.
- The Philadelphia Experiment
The story says that in the fall of 1943 the U.S. Navy made a destroyer invisible and teleported it from Philadelphia to Norfolk. The Navy's own historians say they have repeatedly searched the records and found nothing confirming the event, and the ship's war diary shows it was never in Philadelphia during that period.
- The Phoenix Lights
On the night of 13 March 1997, people across Arizona reported strange lights, including a boomerang-shaped formation and a row of lights over Phoenix. In July 1997, military spokesmen said Maryland Air National Guard A-10 jets had dropped flares that night. Press reports at the time noted the flares did not appear to account for every sighting.
- The Reptilian Elite: David Icke's Lizard People
Former British sports broadcaster David Icke claims that shape-shifting reptilian beings secretly control the world. There is no evidence for this. In 2022 the Dutch government barred him from entering the country, citing what it called his 'antisemitic and offensive statements in the past.'
- The Stanley Kubrick 'Moon Landing Confession' Video
A widely shared video claims to show director Stanley Kubrick confessing that he filmed fake Apollo Moon landings for NASA. Snopes rated the claim false. It found that the video comes from T. Patrick Murray's film Shooting Kubrick and that unedited footage contains hints the man in it is an actor. A spokesman for Kubrick's widow said Kubrick was never interviewed by Murray.
- The Titanic–Olympic Switch Theory
A popular theory claims the ship that sank in 1912 was not the Titanic but its damaged older sister, the Olympic, secretly swapped in as an insurance scam. Historians and fact-checkers say the evidence, including the hull numbers on recovered wreckage, shows the ship on the seabed is the Titanic.
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