Image 2 (IMAGE) University of Bristol Caption Graphic: Bone tissue (osteohistological) sampling, body mass evolution and explosive diversification of Alvarezsauroidea. Credit Zichuan Qin Usage Restrictions With press release. 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.