Cryo-electron tomography of diatoms (IMAGE) University of Basel Caption Diatoms (blue/white/yellow) frozen on an electron microscopy grid (copper) during a sample preparation step for cryo-electron tomography. Credit Benoit Gallet and Martin Oeggerli, Micronaut Usage Restrictions Only to be used in reporting on the related press 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.