Lateral mandible views (IMAGE) University of Bristol Caption Lateral mandible views (from top to bottom) of Raptorex kriegsteini (LH PV18), juvenile T. rex (BMRP 2002.4.1), and adult T. rex (FMNH PR 2081), illustrating differences in jaw form and stresses during tyrannosaur development. Units are in mega pascals (MPa). Credit Andre Rowe Usage Restrictions Once with release 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.