Seventy-eight years ago, scientists created a unique sort of timepiece — named the Doomsday Clock — as a symbolic attempt to ...

"How accurate is the clock?Though the clock can't measure threats ... On Tuesday, the clock was set at 89 seconds to midnight — the closest the world has ever been to that marker, according ...

"How accurate is the clock ... For the two years prior, the Bulletin set the clock at 90 seconds to midnight mainly due to Russia's invasion of Ukraine, the potential of a nuclear arms race ...