The authoritative guide to ensuring science and technology make life on Earth better, not worse.

Watch the 2025 Doomsday Clock announcement on January 28

Doomsday Clock Multimedia

Doomsday Clock Animated

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Doomsday at Midnight

Doomsday Slam

By Thomas Gaulkin

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The Clock: A Brief History

By Private: Janice Sinclaire

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Know the Time: 1944—2017

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Why the Bulletin supports the March for Science

By Bulletin Staff

The Doomsday Clock, explained

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The Doomsday Clock on Madam Secretary

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The Clock is ticking

By Private: Janice Sinclaire

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Introduction: the Doomsday Dashboard

By Bulletin Staff

Doomsday Timeline

A timeline of conflict, culture, and change

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Recent Highlights

Memo to Trump: Address the new threat of drone-vulnerable nuclear reactors

Memo to Trump: Modify the US policy of sole authority to launch nuclear weapons

Memo to Trump: Engage in an open-ended diplomatic process with North Korea

Memo to Trump: Cancel the sea-launched nuclear cruise missile

climate

Recent Highlights

Memos to Trump: Policy recommen­dations the new president might actually like

two firefighters spraying burning buildings with hoses with a destroyed building in flames in the background

Spreading like wildfire: How Trump’s misinformation about water and fire in Los Angeles inflames the situation

firefighter in silhouette with multiple fires in background

‘Not enough firefighters’: Historic wildfires rage unabated in Southern California

Trump has a fighting chance to prevent Arctic meltdown. He should take it.