Holographic microscopy of microplankton (IMAGE) University of Gothenburg Caption An illustration of microplankton in a solution. The round rings under the microplankton are the holograms formed when light is refracted by the microplankton. Credit University of Gothenburg Usage Restrictions None 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.