human
Why is it that a polar bear can live in the Arctic and a penguin can live in the Antarctic?
assistant
Polar bears are adapted to live in the Arctic. Penguins are adapted to live in the Antarctic. The Arctic is colder than the Antarctic, so polar bears need thicker fur to keep warm. Penguins have feathers for insulation. So polar bears can live in the Arctic, and penguins can live in the Antarctic.