Every winter, some animals disappear into a deep sleep, surviving the freezing temperatures in hibernation. From bears and ...

From chipmunks to woodchucks, hundreds of animals hibernate. Are polar bears on that ... Fat reserves help polar bears maintain their health. For example, a seal weighing 121 pounds can provide ...

The cold, dark winter months can make it difficult for animals to find food and water. Hibernation helps some animals survive this time. These animals become inactive to save energy. An animal in ...