Einstein’s ‘Imaginary Elevator’ thought experiment proven right again. New research used Earth as the elevator, and compared the “ticks” of a dozen atomic clocks all over the planet to look for variations. After studying nearly 15 years of data, they found an invariance was just 0.00000022.

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Einstein’s ‘Imaginary Elevator’ thought experiment proven right again. New research used Earth as the elevator, and compared the “ticks” of a dozen atomic clocks all over the planet to look for variations. After studying nearly 15 years of data, they found an invariance was just 0.00000022.