Crash Course
Mass Separation: Crash Course Engineering #17
It can be really important to separate out chemicals for all kinds of reasons. Today we’re going over three different processes engineers use to achieve that separation: distillation, which separates substances based on their different...
Crash Course
Cosmic Sexy Time, Eggs, Seeds, and Water: Crash Course World Mythology
In which Mike teaches you about the creation of the universe, with sex. This week we're talking about creations stories from Egypt, West Africa, Greece, China, and Persia that have a lot in common with human sexual reproduction. And also...
Crash Course
Animal Behavior - CrashCourse Biology
Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do.
Crash Course
Equilibrium: Crash Course Chemistry
In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance... well, your chemical life. Equilibrium is all about balance and today Hank discusses Chemical Equilibrium, Concentration, Temperature, and...
Crash Course
Productivity and Growth: Crash Course Economics
Why are some countries rich? Why are some countries poor? In the end it comes down to Productivity. This week on Crash Course Econ, Adriene and Jacob investigate just why some economies are more productive than others, and what happens...
Crash Course
Asian Responses to Imperialism: Crash Course World History
In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism, specifically writers from countries that were colonized by European...
Crash Course
Carboxylic Acid Derivatives & Hydrolysis Reactions: Crash Course Organic Chemistry
Esters have a wide range of uses, from giving perfumes and colognes their fragrances, to preventing diseases like scurvy. Vitamin C, that scurvy preventing antioxidant, is derived from carboxylic acids, a class of organic compounds we’ve...
Crash Course
The Rise of Cotton Crash Course Black American History
Cotton is everywhere in our modern world, and it became a hugely important crop in the 19th century United States. Cotton was a huge economic boon to the US, and much of that wealth was built on the backs of enslaved laborers. And cotton...
Crash Course
Blood Vessels, part 2: Crash Course A&P
And now we return to blood vessels. In this episode, we start discussing what blood pressure is, how it can become "high", and what that means for our health. One of the more interesting points is that your body has ways of dealing with...
Crash Course
Machine Learning & Artificial Intelligence: Crash Course Computer Science
So we've talked a lot in this series about how computers fetch and display data, but how do they make decisions on this data? From spam filters and self-driving cars, to cutting edge medical diagnosis and real-time language translation,...
Crash Course
Iran's Revolutions: Crash Course World History 226
In which John Green teaches you about Iran's Revolutions. Yes, revolutions plural. What was the1979 Iranian Revolution about? It turns out, Iran has a pretty long history of unrest in order to put power in the hands of the people, and...
Crash Course
The Nucleus: Crash Course Chemistry
Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of...
Crash Course
Foreign Aid and Remittance: Crash Course Econ
What is foreign aid? How much foreign aid does the United States distribute each year. Comparatively, not much. In fact, foreign aid only accounts for a small fraction of most nations' overall spending. But it's hugely important. Foreign...
Crash Course
The Economics of Immigration: Crash Course Econ
Is Immigration good or bad? Immigration is a touchy subject in the United States. The 2016 election has been filled with debate about the subject, and both proponents and opponents have lots of reasons for their stance. But, this is a...
Crash Course
World War II: Crash Course European History
Only a couple of decades after the end of the First World War--which was supposed to be the War that Ended All Wars--another, bigger, farther-flung, more destructive, and deadlier war began. Today, you'll learn about how the war in...
Curated Video
Election Basics: Crash Course Government and Politics
This week Craig is going to give you a broad overview of elections in the United States. So as you may have noticed, there are kind of a lot of people in the U.S, and holding individual issues up to a public vote doesn't seem...
Crash Course
Martin Luther King, Jr: Crash Course Black American History
Today we're going to learn about perhaps the best-known leader in the Civil Rights Era, Martin Luther King, Jr. From his rise to notoriety during the Montgomery Bus Boycott in 1955, his leadership of the Southern Christian Leadership...
Crash Course
Why Early Globalization Matters: Crash Course Big History
Globalization has been in process for centuries, and has had a huge effect on Big History, and on Collective Learning. This week, Emily is investigating early globalization through three things that moved around the world and shaped...
Crash Course
How Not to Set Your Pizza on Fire: Crash Course Engineering #15
Today we’re going to explain how exchangers...exchange heat. We’ll look at concentric tubes, finned tubes, plate heat exchangers, and shell-and-tube heat exchangers. And we’ll look at some equations to help us sort through heat transfer...
Crash Course
Taxes: Crash Course Economics
We've been talking about the unavoidables recently. Last time, we covered Death. This time, it's taxes. So, what are taxes? Why do we pay taxes? What is all that tax money used for? This week, Adriene is going to cover all that and more....
Crash Course Kids
How to Get Resources - Picky Pineapples
Want a Pineapple? If you want a pineapple, it's possible you can just run down to the store and get one. But, if you wanted to grow one, that's a lot more difficult depending on where you live. In this episode of Crash Course Kids,...
Crash Course
Liquids: Crash Course Chemistry
In this episode of Crash Course Chemistry, Hank gives you the low down on things like London Dispersion Forces, Hydrogen Bonds, Cohesion, Adhesion, Viscosity, Capillary Action, Surface Tension, and why liquids are just... WEIRD!
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Crash Course
Electronic Computing: Crash Course Computer Science
So we ended last episode at the start of the 20th century with special purpose computing devices such as Herman Hollerith’s tabulating machines. But as the scale of human civilization continued to grow as did the demand for more...
Crash Course
Software Engineering: Crash Course Computer Science
Today, we’re going to talk about how HUGE programs with millions of lines of code like Microsoft Office are built. Programs like these are way too complicated for a single person, but instead require teams of programmers using the tools...