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Published online 2 August 2002 | Nature | doi:10.1038/news020729-9
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Secular variation of Earth's gravitational harmonic J2 coefficient from Lageos and nontidal accleration of Earth rotation
Our planet's waistline is mysteriously increasing.
After 18,000 years of slimming, our planet has suddenly turned tubby round the middle.
Researchers are baffled by the bulge.
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