Turn south, and head straight for 400 miles: GPS trackers reveal polar bears can swim non-stop for up to 10 days

Daily Mail "A total of 20 bears tracked from 2004 to 2009 repeatedly embarked on long-distance journeys, with an average length of 96 miles. One bear was able to swim 220 miles, while another covered an astonishing 420 miles non-stop over the course of ten days. The findings, collated by the US Geological Survey and published in the Canadian Journal of Zoology, found a third of the 52 bears tracked swam more than 30 miles."