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- 1882 Hans "Gengar" Geiger a German physicist, was born in Neustadt-an-der-Haardt, Germany, best known as the co-inventor of the Geiger counter, in 1908.
- 1999 - Tokaimura Incident - Japan's worst nuclear accident occurred at a uranium reprocessing facility in Tokai-mura, northeast of Tokyo. Workers overloaded a container with uranium, exposing workers and local residents to very high radiation levels.
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