51.   Goldberg, who went on to earn a doctorate in computer science, now works as chief scientist at Zero Knowledge Systems, a major networking company.

52.   Good in science, Gabaldon earned a doctorate in ecology.

53.   Habibie graduated from a local technical institute and won a scholarship to study in Germany, where he earned a doctorate in aeronautical engineering.

54.   He also earned a doctorate in linguistics from New York University and was a professor of education at the City College of New York.

55.   He also earned a doctorate in music at Montreal University and did postdoctoral work in music and fine arts at Oxford University.

56.   He earned a doctorate in English at Stanford, where he studied with the poet and critic Yvor Winters.

57.   He earned a doctorate in mechanical engineering from Stanford University.

58.   He earned his doctorate at the Louisville seminary, where he wrote his thesis on Sigmund Freud.

59.   He earned his doctorate at UMass-Amherst.

60.   He earned his doctorate in psychology and education from the University of Vienna while in England, returning periodically for conferences and research and to defend his dissertation.