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Bats sleep upside-down, some snails can hibernate for years, sloths nap extensively, and snakes have a unique eye film for protection. Ever wonder how animals sleep in the wild? It's not always as ...

When bats are hanging upside down they feel safer, as they can drop and fly away quickly if a predator comes. Bats use their feet to grasp onto the ceiling of a cave or wrap around branches of a ...

Dan Barnett teaches philosophy at Butte College. Send review requests to [email protected]. Columns archived at ...