Time is almost up on the way we track each second of the day, with optical atomic clocks set to redefine the way the world ...

Nuclear weapons, climate change and biological threats are the biggest concerns.

The new Doomsday Clock time has been set by the Bulletin of the Atomic Scientists. Here’s what it means.

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

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

Wars, climate change, disruptive technologies and the rise of autocracy over the past year prompted scientists to set the clock at 85 seconds to midnight.

The human race is at its closest point yet to destroying itself, according to a reset of the ominous but symbolic "Doomsday ...