How sleeping in 90 minute blocks has helped me get rid of morning grogginess.

For better sleep, many of us turn to sleep-tracking apps, therapeutic techniques or medications and supplements like sleeping pills or melatonin. But sometimes the solution comes down to nothing more ...

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 ...

While some couples might sleep soundly together, for others, sharing a bed is anything but harmonious, especially for those with differing sleep styles. A restful night can be thwarted by tossing and ...