Here’s why sleep matters so much – plus how to fall asleep faster and stay asleep longer.

Stress and anxiety caused by hormone fluctuations means that waking up at 3 a.m. has been plaguing my sleep for months. In these moments of staring at the ceiling, heart pounding and thoughts racing, ...

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 ...

Visualize a child in deep sleep. It’s hard to imagine a more calming image; I can feel my own heart rate slow as I write this. I keep photos of each of my sleeping babies (no longer babies) to ...