The Doomsday Clock is a symbolic clock that represents how close humanity is to a global catastrophe, with midnight symbolizing annihilation. It was created in 1947 by the Bulletin of the Atomic Scientists to warn the public about the dangers of nuclear weapons. The clock is set closer to or farther from midnight depending on the perceived level of threat posed by nuclear weapons, climate change, and disruptive technologies. The position of the minute hand is determined by the Science and Security Board of the Bulletin of the Atomic Scientists, which meets twice a year to discuss world events and decide whether to change the clock.
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