Animals Asleep

Download or read book Animals Asleep written by Sneed B. Collard and published by Houghton Mifflin Harcourt. This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 have a biological need for sleep. But some animals snooze in ways that we would find startling--if not absolutely impossible. A sooty tern, an island bird, takes a nap in midair as it slowly flaps its wings. A fruit bat gets forty winks while hanging upside down from a tree branch. A bottlenose dolphin can put half of its brain to sleep while it continues to swim. What other remarkable methods of sleep exist?