Edward Donnall "Don" Thomas was an American physician, professor emeritus at the University of Washington, and director emeritus of the clinical research division at the Fred Hutchinson Cancer Research Center. He was born on March 15, 1920 in Mart, Texas, United States. Thomas attended the University of Texas at Austin where he studied chemistry and chemical engineering, graduating with a B.A. in 1941 and an M. A. in 1943. Thomas received National Medal of Science in 1990.