Tag «vlogbrothers»

Immune System, Part 1: Crash Course A&P #45

Immune System, Part 1: Crash Course A&P #45

You may not know it, but your body is engaged in a never-ending battle. You are literally covered in staph and strep and e coli, and all sorts of dubious characters that are intent on using you, and your body’s many resources, to feed themselves, find shelter, and reproduce as much as they want. And, …

Witchcraft: Crash Course European History #10

Witchcraft: Crash Course European History #10

Hi I’m John Green and this is Crash Course European History. So, in the first episode of this series, we talked about the significance of the year 1431. Remember, that was the year Joan of Arc was burned to death for heresy and witchcraft because the English were so bewildered that a teenage peasant girl …

Electricity: Crash Course History of Science #27

Electricity: Crash Course History of Science #27

Like thermodynamics, the history of electrical physics has its roots in pre-industrial questions that converged in the nineteenth century. These questions became a research paradigm, driven by a whole crew of researchers… And they led to a power system that reshaped the world. Time to get tingly! [Intro Music Plays] The study of electricity goes …

Dutch Golden Age: Crash Course European History #15

Dutch Golden Age: Crash Course European History #15

Hi I’m John Green and this is Crash Course European History. So in the last episode, we saw the gentry and merchant class of the British Isles defeat the old aristocrat-backed, absolutist monarchy in the Glorious Revolution, ushering in a constitutional government. And this points to a wider development in European history–and for that matter …