Artistic Illustration (IMAGE) Max-Planck-Gesellschaft Caption Artistic illustration of a phylostratigraphy. Credit Image: Irena Andreic, Ruđer Bošković Institute, Zagreb Usage Restrictions None 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.