Disturbed sleep patterns can impair memory, shrink the brain and raise stress levels, academics have found.
Increasing numbers of viewers are staying up late because they lack the willpower to press the off button.
A study has found that morning people tend to be thinner than night owls.
Research suggests that women are worse sleepers than men.
Millions of years ago, when we were shorter and hairier, a night of uninterrupted sleep was impossible to come by.
Those who cuddle up to their pets at night actually sleep better, according to a research.
Chronic insomnia not only hampers one's ability to function effectively during the day, but can profoundly affect health.
A research suggest people who have difficulty remembering names should try sleeping on it.
New devices are being built with 'brighter' screens, which have an impact on the body's ability to produce sleep-inducing hormones.
Having a lie-in at the weekend could raise the risk of diabetes and heart disease, say researchers.
Some sleepwalkers are so immune to pain that they can fall and break a leg but still not wake up, researchers say.
Seth Porges looks at why so many of us struggle to sleep soundly and wake up refreshed.
Millions of adults get five hours' sleep a night at most, it emerged recently.
People in technologically primitive cultures get no more sleep than the rest of us, research shows.
Three couples whose marriages are under pressure because of snoring tell Sadie Nicholas their bedtime stories.