The Doomsday Clock is a symbolic clock face, representing a countdown to possible global catastrophe. The closer they set the Clock to midnight, the closer the scientists believe the world is to global disaster.

Scientists announced yesterday that the clock is set to Three Minutes to Midnight – the closest for 31 years, when it was equaled in 1984!

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Find the Wiki definition here or see the Doomsday Clock timeline in the Bulletin of the Atomic Scientists.