Thursday, November 18, 2010

Why do we have to sleep ?

ok readers,, in this article i will to tell you about "Why do we have to sleep ?"
you must be wondering, why do we need sleep?? what purpose? and whether the benefits of sleep for our bodies?? to find out,, let's read this article carefully. happy reading :)
Dogs sleep,, cats sleep, and you sleep. All mammals and birds sleep. Scientists are not sure if fish, reptiles, and insects sleep.
Big animals sleep less, and small animals sleep more. Elephants and giraffes sleep only 2  to 4 hours a day. Bats, opossums, and armadillos sleep 18 hours a day or more! are you believe it ?

Even kids need more sleep than grownups. A newborn baby sleeps 17 to 18 hours a day. A 10-year-old needs about 10 hours of sleep a night. Grownups need between six and nine hours of sleep a night. Some people need more sleep than others. :D


Scientists do not know for sure why you sleep. They do have some ideas.
Safety could be one reason for sleep. People and other animals might sleep because it keeps them safe at night. It’s hard to see in the dark. Enemies could sneak up and attack animals that are wandering in the darkness. Most mammals and birds go to trees, underground dens, or nests at night. Prehistoric people went into caves or other shelters.. They covered up with furs and fell asleep. You go into your home at night and snuggle up in bed.
Sleep might also help your body work better. Things go wrong if you do not get enough sleep. It is hard to think and work and play unless you get plenty of sleep.
--the end--
ok friends,, that is about "WHY DO WE HAVE TO SLEEP?" ,, so?? you all already know the answer right? thank you for reading. please comment and don't forget to follow me ! ok !

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