February 2008

This article appeared in the February 2008 issue of Physics Today magazine. Pages were scanned and processed for OCR (optical character recognition) for my noncommercial use. An .mp3 audio version was recorded as a personal study resource.
References to the article's content should be attributed to Physics Today magazine, its publisher the American Institute of Physics, and author Bryon Anderson.
Additional references about this topic are listed at the end of this article.
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