T rex Vessels (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption In order to take these mesmerizing microscopy images, the team carefully demineralized small bits of T. rex bone to liberate the preserved vessel tissue inside. The sample used in this study came from the femur of the famous, nearly complete fossil specimen known as "the Nation's T. rex," which is currently on display at the Smithsonian National Museum of Natural History. Credit Boatman et al. and Smithsonian Institute Usage Restrictions None 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.