Fossil Molar Belonged to Old Adult Rodent (IMAGE) Florida Museum of Natural History Caption The advanced state of wear on this Caribeomys merzeraudi fossil molar, seen from above in this CT image, leads researchers to believe it came from an old adult. Credit The Palaeontological Association Usage Restrictions Please credit The Palaeontological Association. 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.