Craig F. Bohren is Distinguished Professor of Meteorology at Pennsylvania State University. He is the author of two popular scientific books, Clouds in a Glass of Beer (for which he received the American Meteorological Society's Louis J. Battan Author's Award) and What Light Through Yonder Window Breaks?, also available from Wiley.
DONALD R. HUFFMAN is Regents Professor of Physics at the University of Arizona. In 1983 he and colleague Wolfgang Kratschmer produced the first sample of C60, buckminsterfullerene. The pair was honored with the MRS medal and shared in the 1994 Hewlett-Packard Europhysics Prize.