(IMAGE) Johannes Gutenberg Universitaet Mainz Caption JGU students recording the outlines of the mosaic – with a tall waterside plant with blossoms and small green leaves on three stems in the exposed portion and the stern and rudder of a boat on the lower left Credit photo/©: Hans-Peter Kuhnen Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.