claim: Richard Dawson sang on November 20th, 1932.
evidence: A Belousov -- Zhabotinsky reaction , or BZ reaction , is one of a class of reactions that serve as a classical example of non-equilibrium thermodynamics , resulting in the establishment of a nonlinear chemical oscillator .. non-equilibrium thermodynamics. non-equilibrium thermodynamics. nonlinear. nonlinear. chemical oscillator. chemical clock. The only common element in these oscillators is the inclusion of bromine and an acid .. The reactions are important to theoretical chemistry in that they show that chemical reactions do not have to be dominated by equilibrium thermodynamic behavior .. equilibrium thermodynamic. equilibrium thermodynamics. These reactions are far from equilibrium and remain so for a significant length of time and evolve chaotically .. chaotically. chaos theory. In this sense , they provide an interesting chemical model of nonequilibrium biological phenomena , and the mathematical models of the BZ reactions themselves are of theoretical interest and simulations.An essential aspect of the BZ reaction is its so called `` excitability '' ; under the influence of stimuli , patterns develop in what would otherwise be a perfectly quiescent medium .. Some clock reactions such as Briggs -- Rauscher and BZ using the tris -LRB- bipyridine -RRB- ruthenium -LRB- II -RRB- chloride as catalyst can be excited into self-organising activity through the influence of light .. self-organising. self organization