by JON CARTWRIGHT
Chin-wen Chou and his colleagues at the National Institute of Standards and Technology (NIST) in Boulder, Colorado, have now demonstrated Einstein’s theories on more mundane scales. In tests of the special and general theories of relativity, the NIST researchers show that time speeds up if you climb just one rung up a ladder, and slows down if you travel at just 36 kilometres per hour. Their results are reported in Science this week.
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