The Doomsday Clock moves to 90 seconds to midnight, signaling more peril than ever

The Bulletin of the Atomic Scientists announced that it has moved the minute hand of the Doomsday Clock to 90 seconds to midnight. From left,, Siegfried Hecker, Daniel Holz, Sharon Squassoni, Mary Robinson and Elbegdorj Tsakhia with the Bulletin of the Atomic Scientists remove a cloth covering the Doomsday Clock at a news conference at the National Press Club in Washington on Tuesday. (Patrick Semansky/AP)

The world is closer to catastrophe than ever: the Doomsday Clock, the metaphorical measure of challenges to humanity, was reset to 90 seconds before midnight on Tuesday.

The science and security board of the Bulletin of the Atomic Scientists said the move — the closest to widespread calamity humanity has ever been judged to be — was "largely, though not exclusively" due to the war in Ukraine.