If you've ever travelled to a different time zone, you probably felt groggy and tired after your flight. Or you've likely missed that extra hour when the clock jumps forward for Daylight Savings time ...

Researchers at the University of Michigan have developed a mathematical model that reveals how our circadian rhythms can have dramatic impacts on how our bodies interact with medicines. This could ...

Do you open your eyes a few minutes before the alarm goes off? This isn't luck, but a biological phenomenon well known to researchers. According to the National Institutes of Health, the human body ...

SEATTLE — Having trouble getting a restful night of sleep? Lynne Peeples, Seattle-based author of "The Inner Clock," said in an interview on New Day Northwest that understanding your "inner clock" ...

DEAR ABBY: I am acquainted with a single mother of a 4-year-old daughter. The mother is depressed and suffers from a circadian rhythm disorder. They don’t go to bed until 4 to 6 in the morning and ...

The reason you’re energized to get out of bed in the morning, but tired enough to crawl back under the sheets again at the end of the day? Your natural 24-hour body clock, also known as your circadian ...