Sir Edward Crisp Bullard FRS (21 September 1907 – 3 April 1980) was a British geophysicist who is considered, along with Maurice Ewing, to have founded the discipline of marine geophysics. He developed the theory of the geodynamo, pioneered the use of seismology to study the sea floor, measured geothermal heat flow through the ocean crust, and found new evidence for the theory of continental drift. Early life Bullard was born into a wealthy brewing family in Norwich, England. He was educated at Norwich School and later studied Natural Sciences at Clare College, Cambridge. He studied under Ernest Rutherford at the Cavendish Laboratory of University of Cambridge and in the 1930s he received his PhD degree as a nuclear physicist. As it was the Great Depression and he was married, he had to find a career to survive on. In the 1930s, nuclear physics did not seem to be it so he switched to geophysics. In 1931, Bullard became a demonstrator in the department of geodesy and geophysics at Cambridge, which at the time of its formation in 1921 consisted of only one person, Sir Gerald Lenox-Conyngham. By himself Lenox-Conyngham was unable to do much. By 1931 he had persuaded the university that he needed help, and had been given funds for a junior post. On the advice of Rutherford he appointed Bullard to this position. At the same time Harold Jeffreys was appointed to a readership in geophysics. In the next eight years, this small group of people had a quite remarkable impact on geophysics. [encyclopedia.com on Bullard] During World War II, he was an experimental officer at HMS Vernon and worked on the development of degaussing techniques to protect shipping from magnetic mines. Career Bullard held a chair at the University of Toronto from 1948 to 1950 and was head of the National Physical Laboratory between 1950 and 1955. He was knighted in the 1953 Coronation Honours List. He returned to Cambridge in 1955, first as an assistant in research, then as a Reader and finally to a chair created for him in 1964. He was a founding fellow of Churchill College, Cambridge. Bullard became one of the most important geophysicists of his day. He also did studies of the ocean floor, even though he suffered from seasickness and could rarely take scientific trips on the ocean. He was important to dynamo theory, hence his most important work