insomnia

Sixty years ago, 17-year-old Randy Gardner broke a Guinness world record by staying awake for 11 consecutive days. His experiment is one of the most well-documented cases of sleep deprivation.

The number of workers getting less than seven hours of sleep a night is rising. Stress and our culture of constant connection may be to blame.

Neurologist Guy Leschziner, author of The Nocturnal Brain, says the brain can be in different sleep stages at once — which explains why people sometimes walk, eat and even have sex when sleeping.

People struggling with insomnia often turn to apps to help them fall asleep. But scientists say only some apps use proven methods that can help address the underlying causes of sleeplessness.