Scientist Explains Why Some People Only Need Only 4 Hours of Sleep

Watch this informative video on why some scientists think people only need 4 hours of sleep.

I think you would get exhausted only having 4hours of sleep consistently every night, but according to researcher Ying-Hui Fu some people are "natural short sleepers."

According to Dr.Fu, two rare genes allow some people to feel rested after 4 or 5 hours of sleep per night.

How many hours a sleep a night do you need to feel rested?

(WIRED)


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