New Predatory Dinosaur (image) University of Chicago Share Print E-Mail Caption Flesh rendering of the 85 million-year-old meat-eater, Aerosteon ("air bones"), discovered in Mendoza Province, Argentina. More than any other dinosaur, Aerosteon helps to prove that dinosaurs breathed like birds with air sacs and stiff bird-like lungs. Credit Drawing:Todd Marshall c 2008, courtesy of Project Exploration Usage Restrictions This image may be used by news organizations reporting the discovery of Aerosteon. Share Print E-Mail 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.