The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history.

the group has changed from counting down the minutes until midnight to counting down the seconds. PHOTOS: 'Doomsday Clock' moves closer to midnight amid threats of climate change, nuclear war ...

The Bulletin of Atomic Scientists began to use a clock in 1947 to symbolize the potential and likelihood of people doing something to end humanity.

WASHINGTON — Earth is moving closer to destruction, a science-oriented advocacy group said Tuesday as it advanced its famous “Doomsday Clock” to 89 seconds till midnight, the closest it has ...