Contact: Steve Koppes
University of Chicago
Caption: Skull of the parrot-beaked dinosaur, Psittacosaurus gobiensis, next to that of a living macaw.
Credit: Mike Hettwer
Usage Restrictions: News organizations may use this image in reports describing the research of Paul Sereno and his associates.
Related news release: Sands of Gobi Desert yield new species of nut-cracking dinosaur