Edward Witten is one of the world's leading researchers in superstring theory. He received his bachelor's degree in history (with a minor in linguistics) from Brandeis University, then he completed graduate studies in physics at Princeton University receiving a Ph.D. in physics in 1976. In1990 he was awarded the Fields Medal for his influence on the development of mathematics.(from Wikipedia) So anyone knows how he shifted from undergraduate history degree to graduate physics degree?!!! Was he studying physics and math during his undergraduate studies or even before?!!!