Getty photographer Mario Tama rode along with NASA scientists to record the state of glaciers in Greenland. This trip was part of an overall project, called Ice Bridge, documenting the state of ice sheets over the North and South poles. See the full photo essay here: Arctic Ice — The Unprecedented Retreat Seen in Photos.

March 29, 2017 Sea ice is seen from NASA’s Operation IceBridge research aircraft above Ellesmere Island, Canada. Mario Tama/Getty Images