Doomsday Clock, midnight
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In addition to nuclear and climate risks, the scientists warned of potential misuse of biotechnology and artificial intelligence.
USA TODAY asked Alexandra Bell, the president and CEO of the Bulletin of the Atomic Scientists, a few questions about the Doomsday Clock.
THE Doomsday Clock is set to be revealed later today in a chilling admission of just how close humanity may be to the brink of apocalypse. The update will take place at 3pm UK time in Washington