The research reveals every heart cell has an internal clock helping the heart turn its activity up and down over the course of a 24-hour cycle. borjomi88/Depositphotos.

However, the contribution of cellular clocks has never been investigated. We now show that a cell-autonomous clock within cardiomyocytes regulates heart rate independently of the central nervous ...

Your heart's beat isn't its only pulse, scientists have discovered. The heart's genes -- and the liver's, too -- have rhythms of their own. Every animal has built-in biological clocks that keep ...