<RX DJH PRUH TXLFNO\ RQ WKH WRS RRU RI D EXLOGLQJ WKDQ RQ WKH ERWWRP RRU DQRWKHU effect of Einstein’s theory of gravity
According to Einstein’s theory of gravity, the general theory of relativity, time flows more slowly in stronger gravity. On the top floor of building, you are farther from the mass of Earth than at the bottom, so gravity is marginally weaker and you age more quickly – so if you want to live longer, should you find yourself a bungalow? It is a fantastically small effect and you would need the most sensitive atomic clocks to show it. Remarkably, however, in 2010 physicists at the National Institute of Standards Technology in the US demonstrated, with the aid of two atomic clocks, that a person standing on one step of a staircase ages more slowly than someone standing on the step above.