Marimo Balls (IMAGE) University of Bristol Caption This is an aggregation of marimo balls in the laboratory, with one that has become buoyant. Credit Dora Cano-Ramirez and Ashutosh Sharma Usage Restrictions Image is for single use only to illustrate this press release and must not be archived. 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.