Oops, I meant to blog this a little bit earlier, but fortunately it’s not too late: Chad Orzel is polling on the Greatest Physics Experiment from a set of eleven nominees (which have been described in some detail in earlier posts at Uncertain Principles). So go over there and vote! My endorsement is for Cavendish. (Also, I regret not nominating Onnes for the discovery of superconductivity.) Preliminary results are here.