What separates early risers from the rest of us.

A growing body of research suggests that wake-up time influences not only productivity but also mood and quality of life. By synchronizing one's alarm with natural light, as many Japanese people do, ...

Getting enough sleep is key to warding off a host of health issues. While falling asleep fast is the goal for some, and staying asleep is the dream for others, it’s normal for your sleep to change ...