Most people follow a monophasic sleep pattern, meaning they sleep one time per day. Alternatively, many people sleep twice per day in a biphasic sleep pattern. People who sleep biphasically usually ...

A polyphasic sleep schedule breaks sleep into multiple short periods each day instead of one long stretch at night. These schedules can lead to sleep deprivation and health risks because they often ...

Carley Millhone is a writer and editor based in the Midwest who covers health, women's wellness, and travel. Her work has appeared in publications like SELF, Greatist, and PureWow. Polyphasic sleep ...

Historic records show humans slept, woke, and slept again regularly before the Industrial Revolution. But was it really a universal habit, and does it have benefits? Though most modern societies sleep ...