Christine Janis, University of Bristol (IMAGE) University of Bristol Caption Author Christine Janis holding a cast of the skull of Thylacoleo carnifex in the Natural History Museum, London. Credit Photo by Elsa Panciroli Usage Restrictions Single use only - not to be archived 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.