is a distinguished fellow at The Santa Fe Institute, which he helped to found, as well as the Robert Andrews Millikan professor emeritus at the California Institute of Technology. Gell-Mann received the 1969 Nobel Prize in physics for his work on the theory of elementary particles. Gell-Mann shared the 1989 Ettore Majorana Science for Peace Prize and was one of the first group selected by the United Nations Environment Program for its Honor Roll of Environmental Achievement. He has received many other honors, including the Albert Einstein Medal in 2005. He was for many years a Citizen Regent of the Smithsonian Institution, and he was a director of the J. D. and C. T. MacArthur Foundation. He is the author of the popular science book The Quark and the Jaguar.