The Belousov Zhabotinsky reaction 8 x normal speed (no music)

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 spaced waves which eventually fill the container. Chemistry by Michael Rogers, camera by Stephen Morris. No music: sorry.