the.com/pendulum
gravity's metronome, proving the Earth spins by quietly refusing to play along
foucault's flexits swing plane rotates, revealing Earth turning beneath it
period secretswing time ignores weight, depends only on length
galileo's musehe timed one using his own pulse
chaos kingadd a second arm and motion turns unpredictable
clock heartbeatruled timekeeping for nearly 300 years