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Published online 10 December 2002 | Nature | doi:10.1038/news021209-4
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Earth's weight watched monthly
Picture of gravity will reveal where the water goes.
A satellite double-act has produced the most accurate map yet of the Earth's gravitational field, researchers announced on Saturday.
Monthly updates of this image will reveal previously invisible changes in ocean currents, groundwater reserves, ice sheets and river basins.
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