Seems that those who sleeps to much aren't just lazy they have a special gene called ABCC9. These gene makes the brain to ask half an hour more sleep.
Sleepy gene occurs in one out of five European says researchers of Ludwig-Maximilians University of Edinburgh,who have reached this conclusion after making studies on volunteers whom blood samples were collected.
Following the results obtained, it was established that the gene variation related ABCC9 need more sleep, Agerpres informs. Therefore, predisposition for long or short sleep is characteristic for family members, regardless of age, seasonal and circadian rhythms.