Bachelor of science in physics and bachelor of arts in English from Stanford University, 1973; master of science and Ph.D. in physics from Stanford University 1975 and 1978 respectively; was assigned to serve as a mission specialist on STS-61M (cancelled); later at Center for International Security and Arms Control, Stanford University; since June 1989 Chief of Space Science Institute, University of California, San Diego; Member of Columbia Accident Investigation Board (CAIB); hobbies: Tennis, running, rugby, volleyball, softball, philately.