The Bulletin of Atomic Scientists announced Tuesday that the "Doomsday Clock" is now set to 89 seconds to midnight.

Scientists move the Doomsday Clock to 89 seconds before midnight, calling on the U.S., China and Russia to address global risks.

Today, the Doomsday Clock was set to 89 seconds to midnight, signaling that experts fear we are dangerously close to a global catastrophe.

Atomic scientists on Tuesday moved their "Doomsday Clock" closer to midnight than ever before, citing Russian nuclear threats amid its invasion of Ukraine, tensions in other world hot spots, military applications of artificial intelligence and climate change as factors underlying the risks of global catastrophe.

The Bulletin of the Atomic Scientists cited climate change, instability in the Middle East and the threat of pandemics as reasons the Earth is closer than ever to total destruction.

"This is a bleak picture. But it is not yet irreversible."