As the sea levels around the globe rise, researchers affiliated with the National Science Foundation and other organizations are studying the phenomena of melting glaciers and the long-term ramifications. Rapid warming at the summit of the Greenland ice sheet has caused year after year of record melting at the surface, raising concern, even as recent research indicates the ice sheet has endured warmer periods. The warmer temperatures that have had an effect on the glaciers in Greenland also have altered the ways in which the local populace farm, fish, hunt and even travel across land. Getty Images photojournalist Joe Raedle traveled north recently, spending two weeks documenting the scientists tracking Greenland's transformation, as well as some of the spectacular scenery and residents engaged in their daily lives.