John Charlton Polkinghorne is an English theoretical physicist, theologian, writer and Anglican priest. A prominent and leading voice explaining the relationship between science and religion, he was professor of Mathematical physics at the University of Cambridge from 1968 to 1979, when he resigned his chair to study for the priesthood, becoming an ordained Anglican priest in 1982. He served as the president of Queens' College, Cambridge from 1988 until 1996.