Every year, as clocks go back in October, millions of people celebrate an “extra hour” of sleep. But how much does this small shift really affect our bodies, our sleep and our mood? According to ...

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, ...

Weizmann Institute researchers say that progesterone and the stress hormone cortisol drive circadian rhythms; when out of ...