The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history. Here's a look at how — and why — it's moved.

Scientists set Doomsday clock closer to midnight amid climate change, Ukraine invasion 06:07. For three years, the hands of the world's Doomsday clock were set at 100 seconds to midnight.

The Doomsday Clock, which has been used to examine the world’s vulnerability to global catastrophe for nearly a century, has moved one second closer to midnight. On Jan. 28, the Bulletin of the ...

The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history. Here's a look at how — and why — it's moved. The Doomsday Clock has never been ...