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 Doomsday Clock, a symbolic measure of humanity's proximity to catastrophic destruction, has been set at 89 seconds to midnight—the closest it has ever been, symbolizing humanity's shortest margin from potential catastrophe since the clock's creation.

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.

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

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

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.

The Chicago-based Bulletin of the Atomic Scientists, which runs the clock, decided to move the clock one second closer to midnight because of climate change, nuclear threats and biological hazards.

Humanity has grown closer to global disaster in the past year, with the Doomsday Clock moving to 89 seconds to midnight.

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 closer to midnight than ever before. What does it mean? How is this determined? Can the clock be wound back?

The Doomsday Clock has been updated to reflected that we are closer to the end of the world. Learn more about the metaphorical clock.