Wild Bacterioplankton (IMAGE) Proceedings of the National Academy of Sciences Caption This is wild bacterioplankton stained with nucleic acid stain. Credit Mathias Middelboe (University of Copenhagen, Copenhagen) 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.