Glacier with blackened surface (IMAGE) Hokkaido University Caption A glacier in Greenland with blackened surface due to bacteria and algae (Photo by Shin Sugiyama, 2014) Credit Shin Sugiyama Usage Restrictions This image is copyrighted but may be used to cover this Feature Story if credited to the creator. 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.