Times (UK): A vast Antarctic ice shelf is in danger of collapsing after the ice bridge that pinned it to land shattered. The Wilkins ice shelf would be the largest slab of ice to be lost by Antarctica in recent times, in what researchers say is a sign of how global warming is reshaping the map of Antartica. The shelf, almost half the size of Wales, is the tenth to break away or shrink to a fraction of its original size in the past 50 years. David Vaughan, of the British Antarctic Survey …