A new study of over 300,000 people has a clear message—and it's not just to go to bed earlier.

It doesn't mean staying up and waking up late is inherently unhealthy.

Ever notice how your night owl friend is always a bit moodier than your early bird buddy? Turns out there might be more to it than just morning grumpiness. Those late-night Netflix binges and midnight ...

WASHINGTON (AP) — Being a night owl can be bad for your heart. That may sound surprising but a large study found people who are more active late at night — when most of the population is winding down ...

People typically tend to be either early birds or night owls depending on when they prefer to be awake. Some people feel the most productive early in the morning, and others feel more productive late ...

New research identifies five types of sleeper – which one are you? - HEALTH IN FOCUS: A new study reveals that sleep types are more varied than simply larks and night owls – and questions the link ...

Scientists have long known we differ in our internal clocks; the early risers, the night owls and everyone in between. But Nature’s latest research reveals that these differences are not just about ...