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.
A polar bear's home range can be 300 times the size of a brown bear's. The size of a polar bear's range depends on a number of factors, including habitat quality and how much food is available there. Polar bears in food-rich areas have smaller home ranges, which often overlap those of other bears.