Nobel Laureate Dr. Marshall Nirenber, 1962

Dr. Marshall Nirenburg in his office with chalkboard and molecular models. He shared the 1968 Nobel Prize in Physiology or Medicine for his work on deciphering the genetic code. (I had the honor of working in the Laboratory of Biochemical Genetics at the National Institutes of Health, where Marshall is laboratory chief.) Photo courtesy of National Library of Medicine Profiles in Science.