Polar bears are the worlds largest land predators. They are at the top of the food chain in the artic where they mostly eat seals. The Bears are found in artic areas. Alaska, Canada, Russia, Greenland and Norway.
Polar bears have long bodies with a large head and neck. They have short tails and long claws that have a slight curve. Their colour ranges from pure white in summer and a yellowish tinge in winter and spring. Polar bears have black skin because it absorbs heat. Their coats have an outer layer of glossy guard hair that conceals a heavy layer of sub-cutaneous body fat. A polar bear is so well insulated that it experiences almost zero heat loss. In addition to it's insulating fur, a polar bears fat layer can measure up to 4.5 inches thick. This layer of fat also adds buoyancy in the water. Polar Bears insulation is so good that adult males quickly overheat when they run.
Because of this they usually walk at a leisurely pace so they don't overheat. A polar bear's body temperature is 98.6 degrees Fahrenheit, which is average for males.