Why Do We Sleep?
Sleep has puzzled people for a long time.Why do we lie down and zone out for hours every night? Isn’t sleep just a giant waste of time? Could we learn to do without it? Now scientists are beginning to answer some of those questions. They’ve discovered that brains and bodies don’t just shut down at night. Quite the contrary! At night, your body repairs itself and grows strong. Your brain is busy making memories and learning. Sleep is so useful that all animals do it. And without it, waking life would be impossible.
All Through the Night
What happens when you go to sleep each night? The sun goes down. You take a bath and
