Independent: An ice bridge which held a vast Antarctic ice shelf in place shattered at the weekend and could herald a wider collapse linked to global warming, a leading scientist has warned. “It’s amazing how the ice has ruptured. Two days ago it was intact,” said David Vaughan, a glaciologist with the British Antarctic Survey. A satellite picture from the European Space Agency showed that a 25 mile-long strip of ice believed to pin the Wilkins Ice Shelf in place had splintered at its …