The importance of sleep is self-evident, yet much remains unknown or uncertain about how we sleep, why we sleep and how to improve sleep. One thing is certain, however: Sleep is not a passive process or a complete “shut down” of the body – many stages of sleep are as active for the mind as being awake. So, the next time you see someone sleeping, keep in mind that though the body may look quiet and peaceful, there is much more to the story.
