Most people typically get between seven to nine hours of sleep each night. Now, science says some people could thrive on just four hours of sleep, feeling completely rested and ready to go. It sounds ...

For most of us, a good night's sleep means seven to nine hours of rest. But for a rare group of people, just four hours is more than enough, and they wake up feeling sharp, refreshed, and energized.

Researchers identified a new genetic mutation that may allow some people to survive, even thrive, on three hours of sleep. The mutation is called SIK3-N783Y. Scientists said mice test subjects ...

A rare genetic mutation that causes a deficiency in an immune regulator called ISG15 is known to make people more vulnerable to some bacterial infections and cause persistent inflammation — but it can ...