Fig 1 (IMAGE) University of Bristol Caption Image shows a type of plankton called Foraminifer – microscopic organisms, the size of a grain of sand – which float with fellow microorganisms close to the surface of the ocean. Credit Bernat Heszler, University of Bristol Usage Restrictions once with release License Original 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.