Lowell Dingusis Research Associate in Vertebrate Paleontology at the American Museum of Natural History in New York and the Natural History Museum of Los Angeles County.Mark A. Norellis Chair of Paleontology at the American Museum of Natural History. Together with Eugene Gaffney, Dingus and Norell coauthoredDiscovering Dinosaurs: Evolution, Extinction, and the Lessons of Prehistory(UC Press, winner of an American Library Association Award).