Long flights play tricks with your internal clock in ways that make you hazy, tired, and out of sync with the world. Your body believes it’s 3 AM when the sun is hot, or you’re awake at midnight, ...

A Japanese research team has discovered a new compound that can advance the body's internal clock—offering hope for faster ...

Disruptions to our circadian clocks—the internal molecular timekeepers "ticking" in nearly every cell of our body throughout the day—can lead to a wide range of health problems, from sleep ...