The polar bear is the most powerful land animal in the Arctic. Everything about its body is designed for ice, snow, and frigid water. In contrast to bears outside the Arctic, polar bear claws are smaller, more curved and sharper, for climbing up slippery slopes. Their teeth have sharper cutting surfaces for slicing the flesh of prey. Their hairs appear white, but are actually colorless and hollow. They seem to act like fiber optic cables, shunting light to the skin to warm the animals. Polar bear hairs are up to ten inches long.

Erick Born on researching and tracking polar bears and the disappearance of the bears' habitat.

The bears have five inches of insulating fat on portions of their bodies. Their primary prey is the ringed seal, which they stalk on the sea ice or under water. They also eat bearded seal, walrus and occasionally, beluga whale. There are 20,000 to 30,000 polar bears across the Arctic, 2,000 to 4,000 of which live in East Greenland. Researcher Erick Born worries that the bears will suffer from global warming. Polar bears live and hunt for much of their lives on pack ice, the tightly spaced ice fields that stream out of the Artic Ocean down the coasts of Greenland. However, pack ice is becoming less extensive.

	Polar Bear Tracks Meet the research team at Traill Island in Greenland and see photos including remains of musk ox and polar bear tracks.