Temin, Howard Martin, 1934–94, American virologist, b. Philadelphia, Ph.D. California Institute of Technology, 1959. A professor at the Univ. of Wisconsin in Madison, Temin began his cancer research while still a student, working with his professor Renato Dulbecco and fellow student David Baltimore. In 1970 Temin and Baltimore independently verified Temin's hypothesis that RNA viruses could affect the DNA of cells, transforming them into cancer cells. For this discovery they shared the 1975 Nobel Prize in Physiology or Medicine with Dulbecco.