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 can swim at a speed of up to 6 miles (8 knots) per hour. Unlike other bears, polar bears donât hide a supply of food to return to later. Take the plunge. When the San Diego Zoo received its first polar bear in the summer of 1917, the bear was displayed in a cage, as was typical of zoos of that era.