Contact: Steve Koppes
University of Chicago
Caption: The skull of Psittacosaurus gobiensis (pictured here with the skull of a modern macaw) presents the first solid evidence of nut-eating in any dinosaur.
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