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YouTubeSeeker
How Long Is One Second, Really?
Do we really know how long a second is? The science behind how time is actually measured may prove you wrong. Who Came Up With Days, Hours, Minutes and Seconds? - http://bit.ly/1Q8xt8J Sign Up For The Seeker Newsletter Here - http://bit.ly/1UO1PxI Read More: Scientists want to change the way a second is defined http://www.independent.co.uk/news ...
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