The world is an even stranger place than it seems if these conspiracy theories are to be believed
Was Nemtsov killed by Islamists, the West, Putin's opponents or the Russian president himself?
UFO experts 'summon up' mysterious lights by meditating - or it could be some nautical flares
Some online theorists believe AirAsia crash was predicted last year, others say plane was shot down
Was Flight MH370 captured by aliens? Stolen by Vladimir Putin? Or did it crash in Ukraine? A round-up of the best conspiracy theories
Forget the conspiracy theories and meet the men and women who were there on 22 Nov 1963
JFK was killed by the CIA, the KGB, aliens or by accident. Why three shots fired in Dallas still reverberate across America
Highlights from the latest tranche of MoD 'X-Files' released by the National Archives
Booklet produced in 1991 saying President was born in Kenya gives new hope to conspiracy theorists
New video pours scorn on doomsday scenarios - but doth Nasa protest too much?