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28 November 2011
Does Anybody Really Know What Time It Is
The next line of that Chicago song is “Does anybody really care”. The answer is yes somebody does, and the “somebody’s” are those who keep your GPS working. If you have not seen any of the Minute Physics videos on YouTube, they are a real treat and very informative. Check out this one on GPS and relativity: You probably know that the atomic clocks have to be adjusted because of …