Juvenile Skull Animation (VIDEO) Ohio University This video is under embargo. Please login to access this video. Caption Animation of the skull of a newly discovered juvenile specimen of the Mongolian tyrannosaur Tarbosaurus with the bones and some other anatomical structures labeled. The juvenile was only 2-3 years old when it died, providing insight into the growth and changing lifestyles of tyrannosaurs. Credit Animation by Ridgely and Witmer, Courtesy of WitmerLab at Ohio University. Usage Restrictions Embargoed until 3 p.m. EDT, Monday, May 9, 2011. Please credit source. 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.