REM

Dreams could be described as the visualization of stored thoughts that uncontrollably surface from the unconscious and are created due to each one's experiences. They usually do not have a linear or logical order since the brain draws data from short-term as well as long-term memory, and occur mostly in the ``Rapid Eye Movement'' phase of sleep.

From ancient times to the present day, the world of dreams has occupied man trying to interpret it, usually with parallels, and allegories, giving symboling meanings to things and situations, sometimes even trying to guess the future through them thus allaying his fears of the unknown.

Although science has not yet arrived at a holistic description/explanation of dreams, the "Royal road to the unconscious" has always been, and will be fascinating.