Dr. Hfuhruhurr

I Stole All Of This

thecrashcourse:

Exploring the Universe: Crash Course Big History #2

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.