Sam Bard Treiman (May 27, 1925 – November 30, 1999) was an American theoretical physicist who produced research in the fields of cosmic rays, quantum physics, plasma physics and gravity physics, he was a student of Enrico Fermi,  an Italian physicist and the creator of the world's first nuclear reactor, called what?
Enrico Fermi: Enrico Fermi ( ; ] ; 29 September 1901 – 28 November 1954) was an Italian physicist and the creator of the world's first nuclear reactor, the Chicago Pile-1.
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