Nature & Environment
Animals at the extremes: polar biology
...research on the metabolic basis of this physiological state has been carried out in the USA on the black bear, which occurs over most of USA and southern Canada and is smaller and easier to maintain in captivity than brown bears or polar bears...Animals at the extremes: Polar biology: 3.3.1 Dormancy in black and brown bears - The dormant state of bears differs from true...