Browse Conspiracy Theories

The claim that the US Navy conducted an October 1943 experiment at the Philadelphia Naval Shipyard that made the destroyer USS Eldridge temporarily invisible and teleported it to Norfolk, Virginia — with horrific effects on crew members.

The phenomenon where large groups of people share a vivid but false memory of historical events, objects, or media — coined by researcher Fiona Broome in 2009 after noticing many people falsely remembered Nelson Mandela dying in prison in the 1980s.

A sprawling conspiracy movement originating on 4chan and 8chan in October 2017, centered on anonymous "Q" posts alleging that a cabal of Satan-worshipping pedophile elites controls government, media, and finance, and that Donald Trump is leading a secret war to expose them.

The false claim that a child sex-trafficking ring linked to Democratic Party officials operated out of Comet Ping Pong pizzeria in Washington DC, based on misreadings of John Podesta's hacked 2016 emails.

A loose coalition of researchers and activists who reject the official account of the September 11, 2001 attacks, alleging government foreknowledge, controlled demolition of the World Trade Center, or a staged Pentagon strike.

The theory that the Great Pyramids of Giza could not have been built with the tools and techniques available to ancient Egyptians, suggesting involvement of a lost civilization, advanced ancient technology, or extraterrestrial assistance.

The theory that the white trails left by aircraft in the sky are not ordinary water vapor contrails, but deliberate chemical or biological agents sprayed for purposes ranging from weather control to population management.

The theory that NASA faked the Apollo moon landings between 1969 and 1972, filming them on a secret movie set rather than actually sending astronauts to the lunar surface.

The belief that Earth is not a globe but a flat disc, and that governments and space agencies worldwide are engaged in a massive cover-up to hide this truth from the public.