Tag «crash course»

Crash Course European History Preview

Crash Course European History Preview

Hello and welcome to Crash Course History. I’m John Green; you may know me because I once hosted a series of Crash Course videos on world history, which depending on your perspective was either far too Eurocentric or not nearly Eurocentric enough. Well, we’re about to get rather Eurocentric, because over th… Mr. Green Mr. …

Roman Engineering: Crash Course History of Science #6

Roman Engineering: Crash Course History of Science #6

The Romans invented concrete over two thousands years ago and built roads which are still around today. They used arches and domes to create monumental buildings with big airy interiors that looked truly Olympian—also still around. And they moved thousands of tons of water using aqueducts to keep a bustling population un-thirsty. These old buildings? …