<I>T. rex</I> Vessels (1 of 2) (IMAGE) Experimental Biology Caption A clump of vessel-like structures Mary Schweitzer's team extracted from a Tyrannosaurus rex bone that was almost completely demineralized (broken down). Credit Mary Schweitzer, North Carolina State University Usage Restrictions Please credit Mary Schweitzer, North Carolina State University 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.