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Locations & Positions - Find out where animals sleep. Which ones sleep in groups? Discover how animals sleep. Do they sleep lying down or standing up? Where should your pets sleep?
Duration & Schedule - How much sleep do animals get? When do they sleep? Compare nocturnal and diurnal animals. Do you know what crepuscular means?
REM Sleep - Do animals experience REM sleep? Do they dream? Find out how to distinguish REM & NonREM sleep in certain animals.
Sleep-Like Experiences - Can you tell the difference between hibernation and either torpor or dormancy? Would you believe that some animals may not really sleep at all?
Half-a-Brain at a Time - Learn about the astonishing way in which dolphins and seals sleep!
We have special crossword puzzles all about animals & sleep![an error occurred while processing this directive]