Summary:
- Polar bears do not hibernate like other bears because they need to be active year-round to hunt for food, such as seals, which are their main source of nutrition.
- Polar bears have adapted to the Arctic environment by storing fat during the summer months when food is plentiful, which allows them to survive the winter when food is scarce.
- Instead of hibernating, polar bears enter a state of "walking hibernation" where they reduce their activity and metabolism to conserve energy during the winter months when food is less available.