1.2K views · 22 reactions | All 50 episodes of the *NEW* Crash Course Biology series are now available on YouTube!  Take a journey through life’s vast interconnectedness and discover how evolution, genetics, ecology, and cell and organismal biology deepen our knowledge of every living thing: including YOU! https://www.youtube.com/playlist?list=PL8dPuuaLjXtPW_ofbxdHNciuLoTRLPMgB | CrashCourse | Facebook

For most of history, human progress was slow and life was more or less the same from generation to generation. But over the last thousand years, we’ve seen giant shifts in basically everything! Study Hall’s new Modern World History series will explore the catalyst events, from imperialism to iPhones, that led to the global society we are today. New episodes every Thursday on the @GoStudyHall channel! | CrashCourse