Times (UK): A vast iceberg has broken away from the Antarctic coast, threatening the collapse of a larger ice shelf that is now “hanging by a thread”. Satellite images have revealed that about 160 square miles of the Wilkins Shelf have been lost since the end of February, suggesting that climate change could be causing it to disintegrate much more quickly than scientists had predicted. “The ice shelf is hanging by a thread,” said David Vaughan, of the British Antarctic Survey(BAS). “We’ll know …