image: The trunk region of the skeleton of Rhaeticosaurus. This material relates to a paper that appeared in the 13 December 2017, issue of Science Advances, published by AAAS. The paper, by T. Wintrich at Universität Bonn in Bonn, Germany, and colleagues was titled, "A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan." view more
Credit: [Credit: Georg Oleschinski]