You may have heard of short sleepers, those people who thrive on as little as three-to-four hours of sleep a night. Why do some people need more sleep than others? There might be a cosmic connection. Here's the ideal amount of sleep you need based on your zodiac sign. While the the National Sleep Foundation recommends seven-to-nine hours of sleep for adults per night, some people have successfully bucked the trend. In 2011, CNN even reported that a genetic mutation allows short sleepers to function on a fraction of the sack time that the rest of us need, but is there more to it?
A new podcast series from HowStuffWorks, Part-Time Genius, explores why humans need sleep at all in its first episode, which aired June 7. While you might think the answer is a foregone conclusion, the question of the actual purpose of sleep is a riddle that even scientists are trying to figure out. Perhaps the question isn't one of science at all, but the influence the movement celestial bodies have on your particular star chart.
So just how much sleep do you need? The answer is based on where particular zodiac signs show up in your birth chart, so if your sun-sign sleep recommendation doesn't make sense to you it might be because other signs in your birth chart are more influential over your sleep cycles. Here's what you need to know.