The "Doomsday Clock" is a metaphor for how close humanity is to self-annihilation.

The Doomsday Clock is the closest it has ever been to midnight, after it was officially reset by the Bulletin of the Atomic ...

The Bulletin of the Atomic Scientists set the clock to 85 seconds before midnight, the theoretical point of annihilation.

For decades, atomic clocks have provided the most stable means of timekeeping. They measure time by oscillating in step with the resonant frequency of atoms, a method so accurate that it serves as the ...

For many years, cesium atomic clocks have been reliably keeping time around the world. But the future belongs to even more accurate clocks: optical atomic clocks. In a few years' time, they could ...