Another mystery about sleep is that no two persons need the same amount of sleep. Dr. Nathaniel Kleitman, Associate Professor of Physiology at the University of Chicago, who conducted years…

Theories of sleep Many theories of sleep have been advanced to explain the temporary loss of consciousness which we know as sleep. The oldest theory is that sleep is induced…

Sleep is one of nature’s greatest inventions and blessings of life. It is a periodic rest of the body which is absolutely essential for its efficient functioning. It has been…