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Science 26 August 2005:
Vol. 309. no. 5739, p. 1313
DOI: 10.1126/science.309.5739.1313a
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News of the Week

GEOPHYSICS:
Earth's Inner Core Is Running a Tad Faster Than the Rest of the Planet

Richard A. Kerr

Nine years after suggesting that Earth's inner core may spin faster than the rest of the planet, the original claimants are back with persuasive evidence. The rate is not as fast as it first seemed, but possibly fast enough to help probe the nature of Earth's layered interior.

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