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

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 Doomsday Clock moved to 85 seconds to midnight, the closest ever, due to rising threats from nuclear weapons, climate ...

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