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Gravity Measurements Close in on Big G

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Science  18 Dec 1998:
Vol. 282, Issue 5397, pp. 2180-2181
DOI: 10.1126/science.282.5397.2180

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Gravity's strength, a number called Big G, is perhaps the most elusive of all the fundamental quantities. But when 45 members of the Big G community met last month in London, they had a pleasant surprise. Six groups using a variety of techniques weighed in with new values of G, and all of the results--one of which is reported on page 2230 of this issue--are in rough agreement. Many suspect that experimental finesse may finally be settling the long debate over the value of G.