The Doomsday Clock has never been closer to metaphorical midnight. What does it mean?
The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history.
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Tick-tock! Doomsday Clock moves closer to midnight. Here's what we know
The Doomsday Clock has moved one second closer to midnight, the metaphorical point ... Between 1988 and 1991, the clock was moved back by 11 minutes with the fall of the Soviet Union, the end ...