Andrew Thomas is a Ph.D. student at the University of Oklahoma, in the town where he was raised. He lives there with his wife and son. Andrew became fascinated with paleontology at an early age on regular field trips to outcrops in Oklahoma, Arkansas, and Texas with his father and brother, collecting the usual marine critters: brachiopods, echinoderms, and gastropods. He never grew out of that early delight in ancient life, and decided to turn that passion into a career in vertebrate paleontology. His research is now focused on the ornithopod dinosaurs of the Jurassic and Cretaceous, especially in the evolutionary trends in basal forms that led to the wildly successful duck-billed hadrosaurs, as well as the ability of ornithopod species of different sizes and shapes to coexist.