The time of year an animal goes into hibernation depends on its species and the current temperatures. Some animals only hibernate for a few weeks, while other true hibernators rest for moths. List ...

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 ...

If astronauts could slow their metabolic rate drastically, they could potentially “sleep” through long voyages between the ...