At the heart of the universe is a steady, insistent beat, the sound of cycles in sync. Along the tidal rivers of malaysia, thousands of fireflies congregate and flash in unison; the moon spins in perfect resonance with i...At the heart of the universe is a steady, insistent beat, the sound of cycles in sync. Along the tidal rivers of malaysia, thousands of fireflies congregate and flash in unison; the moon spins in perfect resonance with its orbit around the earth; our hearts depend on the synchronous firing of ten thousand pacemaker cells.