12 MEDICAL DEVICE REGULATIONS In Canada, devices of classes III and IV are subject to in-depth regulatory scrutiny,while class II devices require only the manufacturerâs declaration of device safety andeffectiveness before sale.
No problem: Polar bears in the study were seen swimming distances of 90 miles without any problems - and some bears went a lot further Scientists discovered that during the summer months, when sea ice is at its minimum, the bears were swimming farther and for longer periods of time than ever before in search of new hunting grounds.
According to The Great Bear Almanac, the range of a single polar bear is more than 51,800 sq km (20,000 sq miles). In fact, polar bears inhabit the largest living space of any terrestrial animal species.n 2005 scientists reported that they had tracked a tagged polar bear as it swam a distance between 74 km (46 miles) and 99 km (62 miles) in a 24 hour time period. While it has long been known that polar bears swam great distances, this was the first time such a long swim had been scientifically tracked.