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Science 19 November 2004:
Vol. 306. no. 5700, pp. 1308 - 1309
DOI: 10.1126/science.306.5700.1308
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Measurement and the Single Particle

Andrew Watson

It's a guiding principle in science: to understand something, break it down to its smallest constituent parts. Now metrologists are getting into that game by counting out individual atoms, electrons, photons, or phonons to put their standards on rock-solid foundations.

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