Domed Dinosaur King of the Head Butt (VIDEO) University of Calgary 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 The following animations depict stresses on skulls of the pachycephalosaur Stegoceras validum and a duiker, a modern-day head-butting antelope, resulting from simulated collisions with rivals. Both animals are the size of a small German shepherd, and would collide with similar forces. The duiker cranium "lights up" through more of the skull than in the Stegoceras animation, indicating higher stress and lower structural integrity for head butting. The duiker's dome is great for head butting, and the Stegoceras dome would be even better. Red and green=higher stress, blue=low stress. Credit Eric Snively, Ohio University Usage Restrictions Please use above credit 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.