The Greenland Ice Sheet is opening up faster as it responds to climate change. The warning comes in a new, large-scale study of cracks in the world's second-largest body of ice. Using 3D surface maps, scientists led by Durham University in the UK found that cracks significantly increased in size and depth on the fast-flowing edges of the ice sheet over the five years between 2016 and 2021. (More on phys.org)