Georg Pohnert, University Jena, Germany (IMAGE) Friedrich-Schiller-Universitaet Jena Caption Prof. Dr. Georg Pohnert and his research team observed unicellular microalgae, which are able to trace silicate minerals in the water. Credit Jan-Peter Kasper/FSU 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.