The famous Belousov Zhabotinsky chemical reaction in a petri dish. The action is speeded up 8 x from real life. Pacemaker nucleation sites emit circular waves. Breaking the wavefront with a wire triggers pairs of spiral defects which emit more closely…

A simulation of the three-body problem / n-body problem with three free masses. Each mass moves under the gravity of the other two. The masses start with equal distances from each other, and the same speed, moving along a tangent to the circle formed by the…