Robley Dunglison Evans, 1907-1995, B.S. 1928, M.S. 1929, Ph.D. 1932 in physics, California Institute of Technology, came to the Massachusetts Institute of Technology in 1934 as an assistant professor of physics, where he began the first course in nuclear physics in the United States. He became associate professor in 1938 and professor in 1945. He established the Radioactivity Center, one of the first multidisciplinary centers at MIT, in 1935, directing it until his retirement in 1972. His 1930s study of thyroid function using radiotracers led to the establishment of the nuclear medicine program at the Massachusetts General Hospital. He helped develop techniques to preserve human whole blood, and under his direction the MIT cyclotron was the first to be applied to medicine. He was one of the first to investigate the effects of radium on human beings. He was awarded the Enrico Fermi Prize in 1990 for pioneering work in nuclear medicine, in measurements of radioactivity in the body and its effects on human health, and in the use of radioactive isotopes for medical purposes. Evans wrote more than 200 articles and book chapters and the 1955 textbook The Atomic Nucleus. In addition he wrote a pamphlet entitled You and Your Students, a widely disseminated discussion of effective teaching methods.