According to researchers at Norway's Polar Institute, the juvenile fox — which was fitted with a GPS tracking device — covered more than 3,500 kilometres in just 76 days, averaging 46km a day. At one point, its movement rate dropped below 10 kilometres a day for 48 hours. Scientists believe the juvenile, thought to be under a year old when it embarked on its journey, may have encountered bad weather or stopped to "snap up crustaceans from the open water". The second leg of the animal's journey into Canada remains more of a mystery, however. Its transmitter stopped working in...