Lifesize cast of T. rex (IMAGE) University of California - Berkeley Caption A lifesize cast of T. rex in the atrium of UC Berkeley’s Valley Life Sciences Building shows how peculiarly short the dinosaur's forearms were, given that the creature was the most ferocious predator of its day. Credit Peg Skorpinski Usage Restrictions none License Original 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.