Briggs-Rauscher Reaction

You gotta love it when a couple high school science teachers do something in the 70's to get a chemical reation named after them. The two read about some obscure chemical reaction discovered by a Russian in the 1950s and modifed a couple chemicals to produce a striking chemical oscillation. The oscillations normally continue for about ten cycles.

Top Men would like to note that non-biological chemical oscillations were not even thought to exist prior to the 1950s, and through the wonder of modern technology you can watch it before your very eyes.

Sodium Acetate
Periodic Chemical Bits