New UC Davis research shows how an internal circadian clock controls the opening of individual florets in concentric rings in the sunflower head. This helps attract pollinating insects. (Jason Spyres) ...

All animals including humans are subject to daily rhythms in their activity and sleep, hunger, metabolism, and reproduction. The system that regulates these biological rhythms is known as the ...

A team of biologists has unraveled the biochemistry of how bacteria so precisely time cell division, a key element in understanding how all organisms from bacteria to humans use their biological ...