A model made from bone replicas (IMAGE) Ruhr-University Bochum Caption To reconstruct the muscles, Anna Krahl (front) and Ulrich Witzel used a model made from bone replicas and material from the hardware store. This analog model consists of molds of the fore- and hind flippers, wooden slats, chandelier clamps, eyelets and ropes. Credit © Privat Usage Restrictions The image may only be used in the context of the press release "How plesiosaurs swam underwater" published by RUB 3. June 2022. License Original 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.