Here's why:
* Habitat: They are adapted to cold, icy environments with access to sea ice for hunting seals, their primary food source.
* Climate: Polar bears cannot survive in warmer climates.
* Evolution: They have evolved specific physical and behavioral adaptations to thrive in the Arctic, such as thick fur, a layer of blubber, and the ability to swim long distances.
While some zoos and research facilities keep polar bears in captivity, they are not found in the wild outside the Arctic.