Bulletin of the Atomic Scientists' Science and Security Board: On January 27, 2026, the Doomsday Clock was set at 85 seconds to midnight, the closest the Clock has ever been to midnight in its history. The Bulletin of the Atomic Scientists' Science and Security Board (SASB), which sets the Clock, called for urgent action to limit nuclear arsenals, create international guidelines on the use of AI, and form multilateral agreements to address global biological threats.

The Doomsday Clock now stands at 85 seconds to midnight--the closest it has ever been. When the New START treaty expires next week, there will be nothing stopping a new nuclear arms race. Trump and Putin could agree today to stick with New START limits. We can turn back the clock.[image or embed]

-- Senator Ed Markey (@markey.senate.gov) Jan 27, 2026 at 11:23 AM