This Day in the History of Hoaxes: June 20

June 20, 1977: Alternative 3
A documentary titled Alternative 3 aired in England, on ITV. It revealed to viewers the existence of a secret plan by the governments of the world to create a Noah's Ark colony of humans on Mars in anticipation of a looming environmental catastrophe that would soon make the Earth uninhabitable. The earnestness of the show's delivery convinced many that it was real. However, it was intended as a mock documentary, originally intended to be aired on April Fool's Day. More…