For many of us, sleep feels like a luxury we can't afford. We push through late nights, power through with caffeine, and wear our exhaustion like a badge of honor. But what if we've been looking at it ...

If the organ doesn't get time to clean itself at night, it'll find (often inconvenient) time during the day.

When you want to slim down, the plan probably looks a bit like this: Step one, toss out the junk food; step two, pull out the running shoes; and step three, renew that gym membership (and actually use ...

EXCLUSIVE: Many of us make lifestyle changes every January - now a sleep expert explains why we sometimes can't stick to them.