The Biological Rhythm Reset Button

The human body and all living creatures for that matter have a biological clock entranced and synchronized by day and night (light and dark) cycles, what is called the 24-hour circadian rhythm.  As humans age their inability to maintain synchronous sleep/wake cycles shortens lifespan.  It is no surprise then to learn that with advancing age those individuals who retain uninterrupted nighttime sleep cycles tend to live longer.

Likewise, exposure of animals to artificially short or long light/...