Since the first issue of the journal Sleep was published back in 1978, over 300,000 research studies have dug into the science of sleep. Many of these have been “single-association” studies, which ...

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 ...

When people think about ways to improve cardiovascular health, diet and exercise are often at the top of the list. But long-term health, especially in adolescents, might start with something more ...