Crash Course
The Earth
Phil starts the planet-by-planet tour of the solar system right here at home, Earth.
Crash Course
Jupiter's Moons
Before moving on from Jupiter to Saturn, we’re going to linger for a moment on Jupiter’s moons. There are 67 known moons, and 4 huge ones that we want to explore in greater detail. Ganymede is the largest - larger, in fact, than any...
Crash Course
Early Computing: Crash Course Computer Science
Hello, world! Welcome to Crash Course Computer Science! So today, we’re going to take a look at computing’s origins, because even though our digital computers are relatively new, the need for computation is not. Since the start of...
Crash Course
Game Theory and Oligopoly: Crash Course Economics
Would you like to play a game, Dr. Falken? Actually, this episode isn't really about games, or Matthew Broderick, or Thermonuclear War. But enough with the long references to 1983's best movie, War Games. Today Jacob and Adriene are...
Crash Course
Urinary System, part 2: Crash Course A&P
As we promised last week, we're not quite done talking about your pee yet. Today Hank explains how the urinary system regulates the production of urine, by maintaining a study glomerular flow rate. He'll also cover the anatomy of storing...
Crash Course Kids
A Change of Scenery
The world changes. It really does! But sometimes it changes so slowly that we don't notice it. Other times it changes REALLY FAST!!! In this episode of Crash Course Kids, Sabrina talks about some of the reasons things can change quickly...
Crash Course
Reproductive System, part 2 - Male Reproductive System: Crash Course A&P 41
Our month-long exploration of human reproduction continues with a look at testicular anatomy, the steps of sperm production, and how it's influenced by gonadotropin and testosterone. Hank also explains how sperm mature, and how they...
Crash Course
Aggression V. Altruism: Crash Course Psychology
In our final episode of Crash Course Psychology, Hank discusses the ideas of Aggression and Altruism. These two things are difficult to understand and explain so sit tight and get ready to run the gauntlet of human emotions. If you are...
Crash Course
The Weaponization of Outbreaks - Crash Course Outbreak Science
A sad reality that we have to face when studying outbreak science is that sometimes groups of people use outbreaks intentionally to inflict harm on another group. We call this "weaponizing an outbreak", and it's the focus of this episode...
Crash Course
Economic Depression and Dictators: Crash Course European History
We're still leading up to World War II, but first we gotta talk about the rise of the dictators. Today we talk about the rise of militaristic dictatorships in Germany, the Soviet Union, Japan, and Spain, and the economic depression that...
Crash Course
Marie Curie and Spooky Rays: Crash Course History of Science
It's time to talk about one of the most awesome scientists that has ever been awesome: Marie Curie. She figured out ways to get an amazing education despite the limitations of her homeland, discovered some really important answers to the...
Crash Course
The Facts about Fact Checking: Crash Course Navigating Digital Information #2
We're off to fact-checking school. This time, John Green is teaching you how to fact-check like the pros. We're going to walk through the steps that professionals follow, including figuring out who is behind the information we read, why...
Crash Course Kids
Spaced Out
So... how big is the Universe? It's big... really big... no, bigger than that... it's big. In this episode of Crash Course Kids, Sabrina gives us some perspective on this whole Universe thing and how we fit into it.
Crash Course
The Language of Film: Crash Course Film History
In this episode of Crash Course Film History, we talk about the development of the language of films by filmmakers like Edwin S. Porter and his films; Life of an American Fireman and The Great Train Robbery.
Crash Course
Language: Crash Course Psychology
You know what's amazing? That we can talk to people, they can make meaning out of it, and then talk back to us. In this episode of Crash Course Psychology, Hank talks to us and tries to make meaning out of how our brains do this thing...
Crash Course
Human Evolution: Crash Course Big History
In which John Green and Hank Green teach you about how human primates moved out of Africa and turned Earth into a real-life Planet of the Apes. And the apes are people! John and Hank teach you about how humans evolved, and the sort of...
Crash Course
Cinema, Radio, and Television: Crash Course History of Science
Radio, Cinema, and Television have been staples in news coverage, entertainment, and education for almost 100 years. But... where did they all come from? Who started what and when and why? In this episode, Hank Green talks to us about...
Crash Course
Data Structures: Crash Course Computer Science
Today we’re going to talk about on how we organize the data we use on our devices. You might remember last episode we walked through some sorting algorithms, but skipped over how the information actually got there in the first place! And...
Crash Course
Absolute Monarchy: Crash Course European History
So far, the rulers of Europe have been working to consolidate their power and expand their kingdoms, and this is it. The moment they've been working toward: Absolute Monarchy. We're going to learn about how kings and queens became...
Crash Course
Expansion and Resistance: Crash Course European History
In 19th century Europe, with nation building well under way, thoughts turned outward, toward empire. This week, we're looking at how Europeans expanded into Africa, Asia, and Oceania during the 1800s. You'll learn about China and the...
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Government Regulation: Crash Course Government and Politics
Today, we’re going to wrap up our discussion of economic policy by looking at government regulation. We're going to talk about the government's goals for the U.S. economy and the policies it employs to achieve those goals. Ever since the...
Crash Course
Malcolm X and the Rise of Black Power: Crash Course Black American History
In the late 1950s and the early to mid-1960s, a Muslim minister named Malcolm X rose to prominence in the United States during the struggle for Civil Rights. Malcolm X was a member of and spokesperson for the Nation of Islam, and he was...
Crash Course
Dissecting The Camera: Crash Course Film Production
Sometimes the most intimidating part of making a movie is that little box of concentrated technology called "The Camera." But, FEAR NOT! In this episode of Crash Course Film Production, Lily helps us dissect the basics of modern movie...
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Redox Reactions: Crash Course Chemistry
All the magic that we know is in the transfer of electrons. Reduction (gaining electrons) and oxidation (the loss of electrons) combine to form Redox chemistry, which contains the majority of chemical reactions. As electrons jump from...