Hans Bethe

Hans Albrecht Bethe (pronounced Bay-tuh; July 2, 1906 – March 6, 2005), was a German-American physicist who won the Nobel Prize in Physics for 1967 for his discovery of stellar nucleosynthesis. During World War II, he was head of the Theoretical Division at the secret Los Alamos laboratory developing the first atomic bombs. His team worked out the critical mass of uranium-235 necessary to sustain the fission reaction that would enable the bomb to explode.

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The first atomic bomb was detonated at the Trinity site in the Jornada del Muerto Desert, southwestern United States, on 16 July 1945. Witnessing it, Bethe claimed concern only for the smooth running of the test and was not concerned with the implications for the world. "I am not a philosopher," he explained. He also played an important role in the development of the larger hydrogen bomb in the early 1950s. Bethe later campaigned together with Albert Einstein in the Emergency Committee of Atomic Scientists against nuclear testing and the nuclear arms race. He influenced the White House to sign the ban of atmospheric nuclear tests in 1963 and Anti-Ballistic Missile Treaty (SALT I) in 1972.

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July 2: July 2 is the 183rd day of the year (184th in leap years) in the Gregorian Calendar, with 182 days remaining....

1906: 1906 was a common year starting on Monday (see link for calendar)....

March 6: March 6 is the 65th day of the year in the Gregorian Calendar (66th in Leap years). There are 300 days remaining....

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