Researcher Laura Porro (IMAGE) University of Chicago Medical Center Caption Study co-author Laura Porro, a post-doctoral student at the University of Chicago, in the lab with a model skull from a full sized Heterodontosaurus. Credit University of Chicago Medical Center Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.