Dreams can be very coincidental and mysterious. Throughout history dreams have been associated with revelation and prophecy. And so the story goes, that a dream revealed the molecular structure of carbon to a scientist. And so, just as we can wonder what a certain dream means to the dreamer, we can argue about what causes dreams in the first place. Yet, in spite of modern science, dreams still remain mysterious. In this paper I will; give some interesting information I learned about dreams and psychology.