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

Virtual Tour

Images and artifacts from the Turn Back the Clock virtual exhibit. Take the tour here. 

President Lyndon B. Johnson and the ‘Daisy Girl’ nuclear war commercial

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Stanley Kubrick’s doomsday machine and ‘Dr. Stangelove’

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President Barack Obama: People Appeal for Change

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Bertrand Russell and Albert Einstein’s Manifesto

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World’s Most Dangerous Toy? Radioactive Atomic Energy Lab Kit with Uranium (1950)

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Manhattan Project scientists to President Harry S. Truman: Don’t use atomic weapons in World War II

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The Manhattan Project: The race to build the atomic bomb

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Albert Einstein, Leó Szilárd and the letter that led to Manhattan Project

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Trinity: The first nuclear bomb test

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President Ronald Reagan, the USSR’s Mikhail Gorbachev and the INF Treaty

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The Ford Nucleon, nuclear-powered car of the future

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‘Atoms for Peace,’ cancer research and nuclear energy in a postwar America

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Watch the 2025 Doomsday Clock announcement on January 28