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What is Dark Matter? A Mystery of the Universe

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Physics Girl

3.22M subscribers

Fri, 06 Jun 2014 00:00:00 GMT
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Dark matter

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You've probably heard the term Dark Matter, but what is it, and how do we know it exists? Instagram: http://instagram.com/thephysicsgirl Twitter: http://www.physicsgirl.org/twitter Facebook: http://www.physicsgirl.org/facebook http://www.physicsgirl.org/

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