Maintaining a stable heartbeat is critical for survival. Your heart must constantly adapt its output to meet changing demands for oxygen and nutrients. Traditionally, scientists have attributed this ...

New research shows that the heart has a mini-brain -- its own nervous system that controls the heartbeat. A better understanding of this system, which is much more diverse and complex than previously ...

Long before we're born, our heart's tissues twitch and convulse in a rhythm that only ceases in our final hour. It's a function so mechanical we could be forgiven for overlooking its complexity. Yet ...