A conspiracy theory is an explanatory hypothesis regarding a cover up or plot by a covert organisation, often a government.
Conspiracy theories have been dreamed up for generations with new ones popping up constantly. In fact. Nearly every big event in human history has prompted the creation of one or more conspiracy theories.
Some of the more popular conspiracy theories in recent history include the Bermuda Triangle, Area 51, The Knights Templar, crop circles and the Nasca Lines.
A significant minority of the population also believe that the Moon Landing of 1969, September 11 or global warming were conspiracies.
Scroll through the videos, photos and articles below to find out more about conspiracy theories.
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