Photo and illustration credits: Cover and Institute for Advanced Study logo designed by David J. Smith, photos by Tyagan Miller, pp. 2, 3, 7, 8 (left), 9, 10 (bottom), 11-14, 16-20; photo of Otis Bowen courtesy of the IU News Bureau, p. 4; photo of Lee Hamilton courtesy of Indiana Alumni Magazine, p. 5; photo of vocal folds courtesy of IUB Voice Laboratory, p. 8; cartoon by Mike Cagle, p. 12; photo of Gerald Baldasty courtesy of Dick Conrad, p. 15.