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 stranded polar bear mother and her two cubs in Kaktovik, Alaska. As the Arctic sea ice minimum retreats, over 700 miles from the shore, bears must either head north or swim south to land, as the ice breaks up, reducing the amount of time they can spend hunting on the sea ice.