But for everyone else, here’s the bottom line on how low you can go: seven hours is the minimum for your regular sleep schedule, anything between five and seven hours isn’t great but will do if it’s ...

Sleep expert Matthew Walker has a very serious message for Americans. If you’re regularly sleeping less than seven hours a night, says the professor of neuroscience and psychology at the University of ...

Short sleepers, who make up less than one per cent of the population, spend significantly less time snoozing without any ...

Along with getting exercise and eating a nutritious diet, sleeping for 7-9 hours a night is at the top of every doctor's list of habits that will keep you healthy. Experts warn that skimping on sleep ...

Research by the British Sleep Society has found 37 percent of UK adults have experienced insomnia, which can manifest as difficulty falling or staying asleep, while Mental Health UK reports that one ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Most of us treat sleep like it’s a simple budget item: we ...

How does your brain know when it's time to sleep? There are two main factors: Hours Awake. The longer you've been awake, the stronger your drive for sleep. Circadian Rhythm. Your body operates on a ...

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 ...