Sleep is very important. Did you know that sleep is more important than food? A person who does not sleep dies faster than a person who does not eat. Let's say you go to sleep 12 hours late. It will take your body about three weeks to return to normal.We spend about a third(1/3)of our lives in sleep. That's about 121 days a year! How much sleep do we need? We are all different. A baby needs 16 hours of sleep every day.Children 6 to 12 years old need an average of 10 to 12 hours of sleep. teenagers need 9 to 10 hours of sleep.An adult needs an average of 7 to 8 hours a night.There are some people who need only 3 hours of sleep.