Atomic scientists have kept their Doomsday Clock set at 90 seconds to midnight as they did last year, citing worry about Russia’s potential use of nuclear weapons amid its invasion of Ukraine, Israel’s war on Gaza and worsening climate change as factors driving the risk of global catastrophe.Here is what we know about the Doomsday Clock and Tuesday’s announcement:Scientists kept their Doomsday Clock close to midnight and the latest it’s ever been set in its 77-year history.
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