Edward Witten is an American theoretical physicist and professor of mathematical physics at the Institute for Advanced Study in Princeton, New Jersey. Witten is a researcher in string theory, quantum gravity, supersymmetric quantum field theories, and other areas of mathematical physics. In addition to his contributions to physics, Witten's work has significantly impacted pure mathematics. In 1990 he became the first and so far only physicist to be awarded a Fields Medal by the International Mathematical Union. In 2004, Time magazine stated that Witten was widely thought to be the world's greatest living theoretical physicist. 

August 26th, 1951 in Baltimore (Age 69)