Many conspiracy theories imply that major events in history have been dominated by conspirators who manipulate political happenings from behind the scenes.
Conspiracy theories are often not taken seriously, because so many conspiracy theories - almost by definition - lack readily verifiable evidence.
For nearly forty years the debate over the moon landings has been argued; did the United States put men on the moon was there a great conspiracy to convince the public that men had acutallu landed on the moon?
Included here is a video series "Secret Space - Was the Moon Landing a Hoax" which deals with such things as Hitler's involvement in a secret program and NASA's connection and examines the question about whether or not the United States actually put men on the moon in the 1960's.
Read more about the Moon Landing Conspiracy Theory.
A variety of conspiracy theories have emerged which contradict the mainstream account of the September 11, 2001 attacks.
"Paul is dead" is an urban legend alleging that Paul McCartney of the British rock band The Beatles died in 1966 and was replaced by a look-alike and sound-alike.