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Edward Teller (1908-2003) was a theoretical physicist who was born in Austria-Hungary, educated in Germany, and who immigrated to the United States in 1935 to escape Hitler.
His specialty was nuclear energy, both fission and fusion. He discovered the Jahn-Teller Effect in 1939), describing the geometrical distortion of electron clouds undergo in chemical reactions of metals he also helped develop the the Brunauer-Emmett-Teller (BET) isotherm for surface physics and chemistry.
In 1942, Teller worked with [[Leo Szilard]] at the University of Chicago in the early stages of the Manhattan Project, and a year later headed the Theoretical Physics division at Los Alamos in New Mexico.
When the Soviet Union detonated an [[atomic bomb]] in August 1949 based on secrets stolen from the United States, Teller began advocating construction of a far more powerful hydrogen bomb. He derived how to accomplish this with mathematician [[Stanislaw Ulam]].
Teller is best known for testifying against [[Robert Oppenheimer]] in 1954 in congressional hearings that stripped Oppenheimer of his security clearance. Teller testified, "I feel I would prefer to see the vital interests of this country in hands that I understand better and therefore trust more."
One of the few conservative academic physicists, Teller later supported President [[Ronald Reagan]]'s missile defense proposal known as [[Star Wars]].