Restorations (IMAGE) Nagoya University Caption Paleoparadoxia (left: Desmostylia, Paenungulata) and Ambulocetus (right: Cetacea, Cetartiodactyla) in two different ways of reconstructions -- top: terrestrial/semi-aquatic; bottom: obligate aquatic. Credit Fujiwara Usage Restrictions The image only be used with appropriate credit. 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.