Astrange thing happens to nearly everybody at night. They turn off the lights,pull up the covers and1 their eyes. Several hours later, they2 again. Strange, isn't it?
Sleep puzzles science. Scientists and doctors would rather talk aboutwhy one can't fall asleep. They are not sosure3 causes sleep.The best conditions for sleep aregood health and meal which is4 too big nor too small. No worries and acomfortable place can help you fall asleep5.They don't think it'sgood for two people to sleep in one bed.Strange things happen during sleep. Forexample, you move often. You would feel6ifyou didn't. You also dream. Parts of yourbrain are still7when you dream. Dreaming happens when the8andimagination parts of your brain are still awake. In your dream, you can seethings that happened9or people you met before and you mighteven see things that never happen or people you never meet in your real life.Many scientists say10 have shown that most of us dream in colour.Bad dreams may be caused by a stomachache. Don't worry if you dream. Some greatstories and poems were begun while the writers slept.
