Thermal Dorsal (IMAGE) University of Missouri-Columbia Caption A graphic thermal image of a T. rex skull. MU study suggests blood vessels acted as an internal thermostat on a T. rex, much like alligators have today for body temperature control. Credit Illustration courtesy of Brian Engh. 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.