<I>Texacephale langstoni</I> Reconstruction (IMAGE) Yale University Caption Scientists speculate that Texacephale langstoni used the lumps of bone on top of their skulls to ram one another head-on. Credit Nicholas Longrich/Yale University Usage Restrictions With appropriate 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.