Quanhucun Cat Bones (IMAGE) Washington University in St. Louis Caption These are field specimens from the site of Quanhucun showing key body parts and the presence of an aged animal with worn dentition. (A) Left mandible with worn fourth premolar and first molar; (B) right humerus; © left pelvis; (D) left tibia. Credit Courtesy of <i>PNAS</i>/Embargoed Usage Restrictions With permission of <i>PNAS</i> after expiration of story embargo. 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.