Richard Phillips Feynman was an American theoretical physicist known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, and the physics of the superfluidity of supercooled liquid helium, as well as in particle physics for which he proposed the parton model. He was born on May 11, 1918 in Manhattan, New York City, New York, United States. He studied at the Massachusetts Institute of Technology where he obtained his B.Sc. in 1939 and at Princeton University where he obtained his Ph.D. in 1942. He was Research Assistant at Princeton (1940-1941), Professor of Theoretical Physics at Cornell University (1945-1950), Visiting Professor and thereafter appointed Professor of Theoretical Physics at the California Institute of Technology (1950-1959). At present he is Richard Chace Tolman Professor of Theoretical Physics at the California Institute of Technology. In 1979, he received the National Medal Of Science. He died on February 15, 1988 in Los Angeles, California, United States.