Atomic scientists moved their "Doomsday Clock" closer to midnight than ever before, citing Russian nuclear threats amid its invasion of Ukraine and other factors underlying the risks of global catastrophe.

The Doomsday Clock, which has been used to examine the world’s vulnerability to global catastrophe for nearly a century, has moved one second closer to midnight. On Jan. 28, the Bulletin of the Atomic Scientists announced that the Doomsday Clock was set at 89 seconds to midnight,

Therefore, we are moving the clock forward," said Daniel Holz, chair of the Science and Security Board of the Bulletin of the Atomic Scientists, according to CBS News."The war in Ukraine remains a source of nuclear risk,