The Choir That Learned to Share One Heartbeat

In 2013, researchers at the University of Gothenburg in Sweden discovered something remarkable. When members of a choir sang together, their heart rates gradually synchronized. Beat by beat, breath by breath, separate bodies began pulsing as one. The singers did not will it to happen. They simply opened their mouths, joined their voices, and their very physiology responded — drawing them into a shared rhythm none of them could have manufactured alone.…