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French Satellite Will Test Einstein's Theory of Relativity

A French satellite, just launched, will test a basic theory of famed physics innovator Albert Einstein that, if proven wrong, could undermine the whole foundation of physics. The satellite, called Microscope, launched Monday, will test the concept that in a vacuum, all bodies fall at the same speed -- an idea on which Einstein based the theory of general relativity that made him famous. The principle has been tested before, but according to the French space agency, this experiment will...

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