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Igor Tamm, born in 1895 in Vladivostok, Russia, began his scientific career as a physicist in the field of optics, but made major contributions to theoretical physics. He is best known for his work on Theory of superfluidity and superconductivity, for which he shared the Nobel Prize in Physics in 1958 with Lev Landau. Tamm also played a crucial role in the development of the Soviet nuclear weapons program.