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may 19, 1940 - Frisch and Rudolf Peierls submit a memorandum to the British government estimating the critical mass of uranium 235 needed for an atomic bomb and urging a bomb research project.
Added to timeline:
Atomic Bomb Timeline
By
Alec
14 Mar 2020
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388
Date:
may 19, 1940
Now
~ 85 years ago
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