It was the American physicist Albert Michelson (the creator of the beautiful Michelson interferometer design which enabled very precise measurements of the speed of light) who said &quot;it seems probable that most of the grand underlying principles have been firmly established . . . An eminent physicist remarked that the future truths of physical science are to be looked for in the sixth place of decimals.&quot;<p>Subsequently, the sentiment of this statement has been misattributed to Lord Kelvin.