Publisher's Synopsis
For use in schools and libraries only. Most people spend a third of their life sleeping-around 25 years or more! Sleeping is essential for health and happiness, but no one really knows why we do it or why we have strange dreams. Read on to learn about sleep studies, the benefits of sleep, and what can happen if we don't get enough sleep. Excerpts from Experts: Too much "floppy" tissue in our throat or nose can make us snore. The reef fish Halichoeres bivittatus is one of the world's deepest sleepers and can be lifted to the water's surface by hand without waking up. Leonardo da Vinci survived on two hours' sleep a day in short power naps. A good night's sleep before a test can help with critical thinking.
