Jagdish Mehra has been University Distinguished Professor of Sciences and Humanities at the University of Houston, Texas for many years and also served as UNESCO-Sir Julian Huxley Distinguished Professor of Physics and The History of Science at Trieste and Paris. He has published extensively on the historical and conceptual development of modern physics and is the acclaimed biographer of 'The Beat of a Different Drum: The Life and Science of Richard Feynman'. From Spring 1959 until Schwinger's death, Mehra remained his close friend. Kimball A. Milton is Professor of Physics at the Universit...