A new study found that less sleep could lead to a major side effect in adults.

Humans sleep less than every other primate on record, despite having the biggest brains — biologists call it the human sleep paradox.

Females sleep less, wake up more often and get less restorative sleep than males, according to a new animal study by University of Colorado Boulder researchers. The findings, published in the journal ...

Sleep is often treated as a casualty of modern life. Artificial lighting, shift work, endless notifications and late-night entertainment are usually blamed for cutting into the hours people spend ...

Getting as little as 90 minutes less sleep than usual may lead to gaining weight and becoming more sedentary, a new study ...

Many Americans are getting too little sleep and have too much stress. A new Gallup poll revealed 57% of adults would “feel better if they got more sleep,” while 42% said they get “as much sleep as ...

For most of us, getting less than seven hours of sleep translates into grogginess, sluggish thinking, and an overwhelming urge to crawl back into bed. But some people wake up fresh and energized after ...

Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

New research shows that even modest sleep loss can affect hormones, activity, and weight—revealing why sleep is central to ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Australian researchers have uncovered a startling link between infant ...

Moms of school-age children get significantly less sleep during the school year than during the summer. We are economists who specialize in education and health research. We combined extensive data on ...