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The Doomsday Clock is used to represent the likelihood of a man-made global catastrophe occurring, such as World War 3. Every year, it is updated by the Bulletin of the Atomic Scientists (BAS) and is symbolic of the perceived threat to humanity, with midnight seemingly marking the end of the world. The Clock s original setting in 1947 was seven minutes to midnight, but it has been set backwards and forwards 23 times since then.