Reuters: An ice bridge which had apparently held a vast Antarctic ice shelf in place during recorded history shattered on Saturday and could herald a wider collapse linked to global warming, a leading scientist said. “It’s amazing how the ice has ruptured. Two days ago it was intact,” David Vaughan, a glaciologist with the British Antarctic Survey, told Reuters of a satellite image of the Wilkins Ice Shelf on the Antarctic Peninsula. The satellite picture, from the European Space Agency …