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http://www.youtube.com/channel/UC9MAhZQQd9egwWCxrwSIsJQThe Universe: Mysterious Dark Matter Explained (S2, E6) | Full Episode | History -

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Scientists have no idea what it is, but Dark Matter and Dark Energy make up 96% of the Universe. Dark Matter is everywhere. It passes through everything we know on earth at billions of particles every second, in Season 2, Episode 6, "Dark Matter." #TheUniverse
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