How Is the Doomsday Clock Calculated?

The Doomsday Clock is set by the Science and Security Board of the Bulletin of the Atomic Scientists, in consultation with their Board of Sponsors (which includes Nobel Laureates).

The Methodology

The board evaluates four main threat categories — nuclear weapons, climate change, disruptive technologies (including AI), and biosecurity — then deliberates to reach a consensus setting each January.

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