Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Last week, we met the Presocratics: despite having by any reasonable standard invented science in Europe, these... Read more »
In which John Green teaches you about China’s Revolutions. While the rest of the world was off having a couple of World Wars, China was busily uprooting the dynastic system that had... Read more »
Next stop in our tour of your sensory systems? VISION. With a little help from an optical illusion, we take a look inside your eyes to try to figure out how your... Read more »
Hank talks about the molecules that make up every living thing – carbohydrates, lipids, and proteins – and how we find them in our environment and in the food that we eat.... Read more »
In which John Green teaches you the history of Islam, including the revelation of the Qu’ran to Muhammad, the five pillars of Islam, how the Islamic empire got its start, the Rightly... Read more »
In which John Green teaches you about the election of 1860. As you may remember from last week, things were not great at this time in US history. The tensions between the... Read more »
Moving on to our unit on the Physics of Electricity, it’s time to talk about charge. What is charge? Is there a positive and negative charge? What do those things mean? In... Read more »
Welcome to Crash Course Office Hours! Alizé Carrère and April Luginbuhl Mather answer your questions on human and physical geography, including how rocks form, how melting glaciers impact water resources, and what... Read more »
So, what is geography? In our first episode of Crash Course Geography, we will endeavor to answer this seemingly simple question with the help of a similarly simple factoid: that the US... Read more »
During our last several episodes, Europe and the European-controlled world have been in crisis. Wars, disease, climate changes, and shifts in religious and political power threw the European world into turmoil. People... Read more »