In the sense of the Doomsday clock, it means how close we are to catastrophe.
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.
On Tuesday, the Bulletin of the Atomic Scientists set the Doomsday Clock forward by a second. The clock, created in 1947 by ...
The Doomsday Clock now stands at 89 seconds to midnight, marking humanity’s failure to address nuclear risks, climate change, ...