Aerial view of the heavily-crevassed surface of a glacier on the Antarctic Peninsula. The crevasses are huge cracks in the ice, and form when the glacier flows down steep or narrow terrain. In that sense, they are analogous to turbulence on fast-flowing water rapids, just very much slower. The patterns of crevasses on glaciers can help reveal information about their flow rate, and any changes to it. This image was captured by the Digital Mapping System during Operation Icebridge, which is trying to quantify ice flow to better model the effects of melting due to climate change on sea levels. This glacier flows from to the north of the Creswick Peaks to George VI Sound. It was taken in November 2017.