Before Albert Einstein ended his recent visit at California Institute of Technology, he—with Drs. Richard Chace Tolman and Boris Podolsky of the institute—wrote a letter to The Physical Review. This letter, published last week, answers in a measure a persistent query: What good did Professor Einstein's U. S. visit do Science? In the letter he proved that the Past is as unascertainable as the Future.
The uncertainty of the future has been accepted by physics. Physicists can foretell the general action of a vast aggregate...
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