The long-growing crack in the Larsen C ice shelf, one of Antarctica’s largest floating platforms of ice, appears to be reaching its inevitable end. Scientists with Project MIDAS, working out of Swansea University and Aberystwyth University in Wales and studying the shelf by satellites and through other techniques, have released a new update showing that the crack grew a stunning 11 miles in the space of just one week between May 25 and May 31.