Many people have heard of the circadian rhythms or biological processes that follow a 24-hour cycle. Sleeping at night and being awake during the day is a well-known example of a circadian rhythm.

Some bodily activities, sleeping, for instance, mostly occur once every 24 hours; they follow a circadian rhythm. Other bodily functions, such as body temperature, cognitive performance and blood ...

Could your body’s hidden 12-hour clock hold the secret to metabolic health and disease? New research links our internal rhythms to ancient ocean tides. Review: Biological rhythms: Living your life, ...