Doomsday clock hits 100 seconds to midnight - closest to catastrophe ever

The End Is Nigh: Doomsday Clock Reaches 100 Seconds to Midnight"TIMEThe Doomsday Clock is now closer to midnight than ever before"Popular ScienceDoomsday Clock Hits 100 Seconds Until Midnight"CBS Sports Radio 910Doomsday Clock 2020: What does 100 seconds