Atomic Heritage Foundation

In partnership with the National Museum of Nuclear Science & History

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March, 1940

March, 1940

Otto Frisch and Rudolf Peierls conclude that only one pound of highly enriched uranium is needed for a bomb.

Date Range:

1940CE Mar

Era:

1939 to 1941: Investigating Nuclear Weapons

Hear the stories of the Manhattan Project

Browse our collection of oral histories with workers, families, service members, and more about their experiences in the Manhattan Project.

Tour the Sites of the Manhattan Project

Tour some of the key locations of the Manhattan Project with an audio guide.

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Secretary of DOI Sally Jewel and of DOE Ernie Moniz shake hands on launching the new park as a partnership between their two agencies.

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