new creation date for north pole

The results of the 2004 Arctic Coring Expedition (ACEX), which took 430m long cylinders of sediment from the floor of the Arctic Ocean, have just been published in Nature. Several of the findings have shattered widely-held beliefs about the North Pole, including the previous estimates of when it began to cool down and freeze over. Existing climate models had suggested that glaciers and sea ice had begun to form between 6 and 10 million years ago. However, the ACEX team has discovered that the Arctic really started to winterise at around the same time that the Antarctic began to turn white, some 45 million years ago.