A laboratory, different from any others, at the University of Chicago is busy only at night. It is a dream laboratory where researchers are at work studying dreamers. While the students sleep, special machines record their brain waves and eye movements that shows the beginning of the dream as well as the body movements that shows the end of a dream. Observers report that a person usually keeps moving before a dream. Once the dream has started, his mouth doesn't move, neither does his body. But his eyes become more active, as if the certain had gone up on a show. When the dream lasts, many people murmur and even speak without any body movements. But the scientists can't make the final scientific conclusion until now.