Iconic Doomsday Clock moves one second closer to midnight as global existential threats rage. Clock factors include nuclear weapons, climate crisis, artificial intelligence, infectious diseases, and conflicts in Ukraine and the Middle East.

The Doomsday Clock is a metaphor for how close the world is to being inhabitable for humanity. Scientists just set the new time for 2025.

What is the Doomsday Clock? It's 2025 and scientists have reset the clock closer to midnight and global catastrophe. Here's what it all means.

Douglas McIntyre explains the history and significance of the Doomsday Clock, which was recently set to 89 seconds to midnight—the closest ever. Originally created by atomic scientists, the clock now reflects growing concerns about climate change,

The science that guides the Doomsday Clock, which represents how close humanity is to global catastrophe, has been moved to 89 seconds to midnight, the closest it has ever been.

On January 28, the Bulletin of the Atomic Scientists updated the Doomsday Clock from 90 to 89 seconds until "midnight," as world-ending threats continue escalating at

The Bulletin of the Atomic Scientists shifted the hands of the symbolic clock to 89 seconds to midnight, citing the threat of climate change, nuclear war and the misuse of artificial intelligence.

In what may not come as much of a shock to many, the Doomsday Clock has inched closer to midnight and is now 89 seconds away from the ominous hour. It's the closest the two hands have ever been to the symbolic 12 on the clock face in its 80 years.

The Doomsday Clock has been used to examine the world’s vulnerability to global catastrophe for nearly a century.

You can stop a clock from ticking, but it's a lot harder to figure out how to stop humanity's relentless march toward self-annihilation.

The metaphorical clock on the University of Chicago campus ticked forward to 89 seconds to midnight, the closest it has been since it was created in 1947.