Crash Course Big History

Exploring the Universe (1x2)

Ημερομηνία προβολής: Σεπ 24, 2014

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.