The team found a network of cracks that stretched for more than 10 miles (16km) on Ward Hunt, the area's largest shelf. The fate of the vast ice blocks is seen as a key indicator of climate change.
One of the expedition's scientists, Derek Mueller of Trent University, Ontario, told me: "I was astonished to see these new cracks. "It means the ice shelf is disintegrating, the pieces are pinned together like a jigsaw but could float away," Dr Mueller explained. According to another scientist on the expedition, Dr Luke Copland of the