Another You Tube recommendation this evening. The second of the Vlogbrother's new education channels, today is the launch of Crash Course. While in SciShow each video is a complete bite of science on it's own, the Crash Course videos are going to be in much longer series. To start with John is teaching world history and Hank is teach biology. Today is the first episode of John's world history lessons. I was never very good at history when I was at school, perhaps I'll learn something this time. He has made a good job of making the history of agriculture sound interesting!