Sleep

Everybody needs sleep. There are 24 hours in a day, and most people sleep for about eight hours. Many children sleep more than eight hours because they are growing. Many old people sleep less than eight hours because they sleep during the day

We usually work and study during the day, and sleep during the night. But little babies sleep during the day, too. Most babies sleep for about 16 hours a day.

What happens when you sleep?

First, you feel tired, your eyelids close and soon you are asleep. After about an hour and a half, your eyes start to move very fast behind your closed eyelids. This is because you are dreaming. You probably dream about four times every night, but you do not usually remember your dreams when you wake up.

Most people sleep quietly, but some people talk or walk when they are asleep. Some people also snore. We call them snorers. Snorers cannot hear the noise they make. The loudest snorer in the world lives in Sweden. He made the loudest noise in 1993. It was as loud as a train! Can you believe that?