Some lucky people have rare genetic mutations that enable them to feel well-rested after just four hours of sleep, while the rest of us need around eight hours to function. Now, researchers have ...

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 ...

Scientists have discovered a rare genetic mutation that lets some people thrive with just four hours of daily slumber, an advance that could lead to new therapies to induce better sleep and rest.

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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.