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Updated: August 20, 2026
It is now one of the fully-established facts of physical science that no atom of what we call "dead matter" is without motion.
But the small minority has already prevailed: the emission theory has gone out; the undulatory or wave theory, after some fluctuation, has reached high tide, and is now the pervading, the fully-established system. There was an intervening time during which most physicists held their opinions in suspense.
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