The great ice streams of the Antarctic and Greenland are like frozen rivers, carrying ice from the massive inland ice sheets to the sea—and a change in their dynamics will contribute significantly to sea-level rise. The great ice streams of the Antarctic and Greenland are like frozen rivers, carrying ice from the massive inland ice sheets to the sea—and a change in their dynamics will contribute significantly to sea-level rise. Earth Sciences Environment Phys.org – latest science and technology news stories