"It sounds counterintuitive, but for those who find it difficult to sleep because they keep worrying about not falling asleep ...

Circadian researchers explain why a single hour can rattle your body, and the simple steps that streamline the switch.

The US military's research arm is researching how to improve sleep for combat troops and pilots. The DoD has long known that chronic sleeplessness can pose serious long-term health risks. DARPA-funded ...