Youtor
Dark Matter
YOUR LINK HERE:
http://youtube.com/watch?v=VL6ZNHiqP9A
Physicists estimate that dark matter accounts for about twenty three percent of the known universe - the only problem is that no one really knows what it is... • Like SciShow? / scishow • Follow Scishow! / scishow • References for this episode can be found in the Google document here: http://dft.ba/-3fCA
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