Nearly three years later, the risk of nuclear war has only increased, top experts say. The Bulletin of the Atomic Scientists' famed "Doomsday Clock" is the closest it has ever been to midnight.

Nearly three years later, the risk of nuclear war has only increased, top experts say. The Bulletin of the Atomic Scientists' famed "Doomsday Clock" is the closest it has ever been to midnight.

Earlier this year, the Bulletin of the Atomic Scientists announced that it was moving the hands of the Doomsday Clock to 89 seconds before midnight, a symbolic hour signifying global catastrophe. The ...

The risk of nuclear war and the threat of climate change have caused the Bulletin of the Atomic Scientists to move the Doomsday Clock 30 seconds closer to catastrophe to two minutes to midnight.