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 rarely live beyond 25. Range: Polar bears can swim for up to 60 miles in open water. The shark can descend to depths of 2,200m. Weapons: The bears' claws are for digging in ice, its teeth are its main weapon. The shark has rows of sharp upper teeth.