This is a great and exciting discovery. Every one has dreams, auspicious or boding, simple or complex, in familiar environment or in unfamiliar, short or long. One would usually ask: "what in hell is the dream meaning to me?"; and ponder for a long time. Dream likes a goo stuck on his brain. That discovery can help the further scientific research to the cause of dream, for which, mankind has been puzzled for a long, long time.