Have you heard the saying we only need 6 hours of sleep a day? Well, Researchers at the University of California, San Francisco, discovered that some people have a gene that enables them to function well on six hours of sleep a night. This gene, however, is very rare, appearing in less than 3% of the population. For the other 97% of us, six hours doesn’t come close to cutting it. I sleep late at night and I tend to feel dizzy during the day and even dozing off. But that's just me. Don't let it happen to you.