Crash Course Big History

Crash Course Big History

Exploring the Universe (1x2)


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In which John Green, Hank Green, and Emily Graslie teach you about what happened in the Universe after the big bang. They'll teach you about cosmic background radiation, how a bunch of hydrogen and helium turned into stars, formed galaxies, created heavy elements, and eventually created planets.

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  • : 16
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  • YouTube
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