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.

The scientific body evaluates the clock each January. This is the first full update since Russia’s full-scale invasion of Ukraine began last February, triggering a war in Europe and a new flood of refugees.

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The clock created a stir when it was set to 100 seconds to midnight in 2020, the first time the famous clock had gone down to seconds rather than minutes. At the time, the Bulletin’s scientists said we were “at doom’s doorstep.” It remained at 100 seconds to midnight in 2021 and 2022.

Read more: NPR