New Delhi, July 7 -- Sleep and dream are still the two major mysteries of the brain. Since time immemorial mankind has been intrigued as to why we sleep and what is the nature of dreams. In my personal case one of my earliest memories was of powerful, vivid dreams. At the young age of 4-5 years with hardly any experience to influence these episodes it was amazing to get such dreams. Later on, there were even better episodes of great dreams. Hence a tremendous curiosity arose in my mind about the nature of dreams and sleep and thus this small study.

Various theories exist about the sleep process. We spend almost one third of our life sleeping. There must be a good reason why nature makes us sleep for this much time. Now slowly but surely ...