Feeling groggy these days? NPR's Life Kit has science-based strategies to help you sleep better, deeper and longer. A full night's sleep is a wonderful thing. It improves our memory and brain ...

Ahead of Daylight Saving time this weekend, a sleep doctor offers expert advice to get your best night's sleep, or a quick "nappucino" if you don't have the time. Dr. Cheri Mah is a sleep doctor and ...

The following story is excerpted from TIME’s special edition, The Science of Sleep, which is available at Amazon. Anyone who has nodded off on the subway, faked alertness in a meeting at work or ...