Ice Crystal Stages (IMAGE) Hokkaido University Caption Ice single crystals at different super cooling temperatures observed under a microscope. Credit Bayer-Giraldi M. et al., <em>Proceedings of National Academy of Sciences</em>, July 2, 2018 Usage Restrictions This image is copyrighted and can be used for reporting this press release if properly credited. 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.