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Max Planck (1858-1947) Photo
Photo A3; portrait, arms folded. CREDIT: AIP Emilio Segrè Visual Archives, W.F. Meggers Collection.

Photo A25; old age. CREDIT: AIP Emilio Segrè Visual Archives

"It is impossible to make a clear cut between science, religion, and art. The whole is never equal simply to the sum of its various parts."
--Max Planck 
In his Scientific Autobiography, Max Planck penned a now familiar adage known as Planck's Principle: "A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it."  Ironically, Planck himself is considered an exception to this "rule." At the age of forty-two, in order to propose what would turn out to be a revolutionary quantum explanation of radiation, Planck had to reconcile himself with Boltzmann's statistical interpretation of entropy--a theory Planck had resisted for over twenty years. 
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