Radio New Zealand: An ice bridge which had held a vast Antarctic ice shelf in place for hundreds of years has at least shattered, and may herald a wider collapse linked to global warming. A satellite picture shows that a 40km long strip of ice believed to pin the Wilkins Ice Shelf in place has snapped at its narrowest point, off the Antarctic Peninsula. The loss of the ice bridge, which was almost 100km wide in 1950, could allow ocean currents to wash away more of the shelf. Temperatures …