A look at the history of the Doomsday Clock, a symbolic timepiece showing how close the world is to ending.

What is the 'Doomsday Clock'?

Doomsday Clock - Bulletin of the Atomic Scientists

The Doomsday Clock, explained

Explainer: What is the 'Doomsday Clock' and how does it work?

What Is The 'Doomsday Clock' & How Does It Actually Work?

Scientists set Doomsday Clock closer to midnight

Scientists update Doomsday Clock as humanity remains perilously close to Armageddon

Live updates from Doomsday Clock press conference as fate revealed