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Published online 20 October 2004 | Nature | doi:10.1038/news041018-11
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Spinning Earth twists space
Laser measurements confirm Einstein's general theory of relativity.
One of the last untested predictions of general relativity has been confirmed by the first reasonably accurate measurement of how the rotating Earth warps the fabric of space.
The experiment, carried out for virtually no cost with Earth-based laser range-finders, scoops Gravity Probe B, the US$700 million orbiting craft launched in April to test exactly the same effect.
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