Using state-of-the-art imaging techniques, paleontologists at the Ruhr-Universität Bochum (RUB) have been examining extinct marine creatures. Quantitative analyses provide new evidence that ammonites were able to swim using their shell - very much like the recent nautilus. For the purpose of the study, the researchers, together with partners from the industry, developed an evaluation process for high-resolution computed tomography (CT) images. The science magazine "RUBIN" reports about the results.