Melt Pools (IMAGE) American Geophysical Union Caption These are melt pools on melting sea-ice. New research shows humans may have been altering Arctic sea ice longer than previously thought. Credit NASA Usage Restrictions None 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.