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 new oral compound can reset the circadian clock independent of timing, dramatically speeding recovery from jet lag in animal models.

Our bodies run on an internal clock that helps control when we sleep, wake up, eat, and feel alert. This internal timing system, often called the body clock, follows a roughly 24-hour cycle. It ...