The average human sleeps a total of twenty-four years over a lifetime. That's a lot of naps! Yet people aren't the only ones who enjoy a good rest; if you look around, you'll find that all animals... This description may be from another edition of this product.
Format:Hardcover
Language:English
ISBN:0618276971
ISBN13:9780618276974
Release Date:March 2004
Publisher:Houghton Mifflin Harcourt Publishing Company
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