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American Society for Biochemistry and Molecular Biology

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Science 7 May 2004:
Vol. 304. no. 5672, pp. 812 - 813
DOI: 10.1126/science.304.5672.812
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News Focus

STANDARDS:
A Most Unbearable Weight

Gabrielle Walker

LONDON--The kilogram is the only unit of measure still defined by a physical object. Now, a marathon effort to tie the kilo to a constant of nature is nearing the finish line.

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