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How To Tell If You're Getting Too Little (Or Too Much) Sleep

Everyone has to sleep -- but not everyone has to sleep the same amount.

In fact, even why exactly we need sleep is still barely understood by experts in the field, according to a new video from AsapSCIENCE. And while seven to eight hours a night seems to be ideal for the average person, the perfect night's rest really isn't one-size-fits-all.

Watch the video above for the health effects of too little (or too much!) shut-eye -- and how to know if you're getting the right amount.