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Scientific method (view source)

38 bytes removed , 01:13, April 21, 2007

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[http://www.answers.com/topic/hafele-keating-experiment| Hafele-Keating experiment and later experiments with more accurate clocks ]

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~~experiments with more accurate clocks~~

[http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html| GPS and relativity]

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