Researchers have identified a common gene variant that is responsible for a person’s tendency to be an early riser or a night owl. This common genetic variant also helps determine the time of day a person is most likely to die. The findings appear in the November 2012 issue of the Annals of Neurology.
![Body clock Body clock](https://www.highlighthealth.com/wp-content/uploads/2012/11/body-clock.jpg)