The big bite of the teenage T. rex (VIDEO) University of California - Berkeley This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption UC Berkeley's Jack Tseng, seen peering through the eye socket of an adult T. rex, explains why he measured the bite force of a juvenile T. rex, and what that tells us about the tyrannosaur's lifestyle. Credit UC Berkeley video by Roxanne Makasdjian and Jeremy Snowden, with footage courtesy of Jack Tseng 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.