The broken symphony of swinging metronomes | Max-Planck-Gesellschaft https://www.mpg.de/7325540/chimera-order_disorder-synchrony
A team led by researchers from the Max Planck Institute for Dynamics and Self-Organization has realised a mixed state (chimera state) of order and disorder with metronomes on two swings which are coupled by springs. The metronomes on one swing then oscillate synchronously; those on the other do not.
symmetry breaking was carefully tested by making sure