Two Beats Per Second: A Shared Rhythm Linking Animals and Humans
Northwestern researchers find that many species signal at about 2 Hz (roughly two pulses per second), suggesting a brain-based resonance that makes this tempo easy to process. This universal timing, within a 0.5–4 Hz band, aligns with human speech and popular music around 120 BPM and may reflect a neural constraint rather than body size, offering a baseline for attention and cross-species communication.