A Drop of Crude Oil on a Water Surface (IMAGE) University of Bonn Caption is adsorbed within seconds by a leaf of the floating fern Salvinia and pulled from the water. Credit (c) W. Barthlott, M. Mail/Uni Bonn Usage Restrictions This image may be used together with the press release. 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.