For millennia, historian Roger Ekirch explains in his book At Day’s Close: A History Of Nighttime, humans slept in two phases ...

"Sleep researchers and clinicians have long understood the role of worry in sleep disturbances," says Dr. Michael Gradisar, ...

Scientists have revealed how much sleep Americans are getting compared to other countries across the globe as a new study ...

Tossing and turning? A psychologist outlines seven common habits that individuals who consistently struggle to sleep through ...