2014-09-24

[public] 1.46M views, 22.9K likes, 414 dislikes audio only

CrashCourse

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.

For more information, visit http://www.bighistoryproject.com

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