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How could Einstien know that nothing could go fsster than lighr
Answers: 5 Views: 856 Rating: 3 Posted: 2015-02-17 19:10:00
How can radio waves go around the world with energy to propell it
Answers: 1 Views: 1869 Rating: 1 Posted: 2015-02-17 19:17:00

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