Genetic Mutation May Keep People On 24.5-Hour Schedule, Study Suggests.

research indicated people with a particular genetic mutation “tend to be night owls because it keeps them on a perpetual 24 ½ hour schedule.” investigators “looked at 70 people from six families and found that a mutation in a gene called CRY1 was common among those who have a condition known as delayed sleep phase disorder (DSPD).” The study indicated that “in people with this condition, the circadian clock runs behind, so they wake up later than normal, and go to bed later than normal.” The researchers found that “the mutation was absent in the members of these same families who did not have DSPD.” http://www.nbcnews.com/health/health-news/gene-mutation-affects-sleep-turning-people-martians-n743526