Header (IMAGE) Aarhus University Caption Danish researchers have found more than 4,000 different species of microorganisms in melt holes in the ice like these. Credit Laura Halbach Usage Restrictions May only be used for communication this research 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.