Einstein's 'Imaginary Elevator' Thought Experiment Proven Right Again

Well, Einstein’s done it again! That is to say, the gravitational theories of Albert Einstein have once again been confirmed, and to a new degree of precision. The equations of general relativity predicted a certain quantity would be zero, and physicists at the National Institute of Standards and Technology (NIST) have calculated a record-low, unbelievably tiny result — basically, as good to zero as we can get. So what did they measure? The variation between different ultra-precise ato

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