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.
Polar bears have built-in socks. The bottoms of their paws are covered with fur to keep them warm and to help with traction in slippery situations. A polar bear can sniff out a seal's breathing hole from more than half a mile away, according to the National Zoo. The bears can smell a seal on the ice 20 miles (32 kilometers) away.