Diatoms (IMAGE) UiT The Arctic University of Norway Caption The single celled algae, diatoms, can be seen using Scanning Electron Microscopy. It can take up to a year to clean a sample enough to be able to take a picture like this. Credit Ulrike Hoff Usage Restrictions No derivatives. Attribution 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.