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.
The bear did not surface but continued underwater toward the second seal, which was about 12-13 meters further along the ice edge. This suggests that polar bears can count to two at least because he clearly knew there was at least one more seal up ahead after the first one escaped into the water.