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

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 CEO who invented a light therapy wearable said he trained himself to wake up without an alarm clock. Circadian rhythm is the body's internal clock. It shifts based on when you see light, eat. and ...