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Science 29 October 2004:
Vol. 306. no. 5697, p. 793
DOI: 10.1126/science.306.5697.793a
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News of the Week

PHYSICS:
Fundamental Constants Appear Constant--At Least Recently

Charles Seife

A group of physicists concerned with precision timing measurements has presented new evidence that contrary to recent reports, a fundamental constant of nature in fact hasn't changed over time.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)