Crash Course
Water - Liquid Awesome: Crash Course Biology
Hank teaches us why water is one of the most fascinating and important substances in the universe.
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Geographies of the Future: Crash Course Geography
In our final episode of Crash Course Geography we're going to take a look towards the future, and to do that we'll need to revisit our fundamental geography tools: space, place, and human-environment interactions! We'll talk about the...
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Alexander the Great and the Situation ... the Great Crash Course World History
In which you are introduced to the life and accomplishments of Alexander the Great, his empire, his horse Bucephalus, the empires that came after him, and the idea of Greatness. Is greatness a question of accomplishment, of impact, or...
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The Roman Empire. Or Republic. Or...Which Was It Crash Course World History
In which John Green explores exactly when Rome went from being the Roman Republic to the Roman Empire. Here's a hint: it had something to do with Julius Caesar, but maybe less than you think. Find out how Caesar came to rule the empire,...
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Electrochemistry: Crash Course Chemistry
Chemistry raised to the power of AWESOME! That's what Hank is talking about today with Electrochemistry. Contained within, Hank discusses electrochemical reactions, half reactions, how batteries work, galvanic cells, voltage, standard...
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Alkanes - Crash Course Organic Chemistry
Alkanes are kind of the wallflowers of organic chemistry, but they still have important functions in the world around us. In this episode of Crash Course Organic Chemistry we’re building our knowledge of organic molecules by learning all...
Crash Course
Tissues, Part 1: Crash Course A&P
In this episode of Crash Course Anatomy & Physiology, Hank gives you a brief history of histology and introduces you to the different types and functions of your body's tissues. -- Table of Contents: Nervous, Muscle, Epithelial &...
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Tissues, Part 4 - Types of Connective Tissues: Crash Course A&P
Today Hank wraps up our look at Connective Tissues with a discussion of its various types and a breakdown of what you can and can't easily break down. Also chicken. -- Table of Contents: Loose and Dense Connective Tissue 2:10.4 Areolar,...
Crash Course
Tissues, Part 3 - Connective Tissues: Crash Course A&P
On today's episode of Crash Course Anatomy & Physiology, Hank continues our exploration of tissues, with an introduction to your connective tissues. -- Table of Contents: Four Types of Connective Tissue 2:34.2 All Develop From Mesenchyme...
Crash Course
Flirting With Disaster - The Importance of Safety: Crash Course Engineering #28
As engineer, sometimes lives will be in your hands, so this week we’re exploring safety and its impact on engineering. We’ll discuss the difference between occupational safety and public safety and how to analyze and review a process for...
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Solutions: Crash Course Chemistry
This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar...
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Reproductive System, part 4 - Pregnancy & Development: Crash Course A&P
We've reached the grand finale of our four part series on human reproduction: BABIES! Today Hank walks you through the stages of pregnancy, beginning with how a zygote develops into blastomeres to a morula to a blastocyst and finally to...
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Women's Suffrage Crash Course US History
In which John Green teaches you about American women in the Progressive Era and, well, the progress they made. So the big deal is, of course, the right to vote women gained when the 19th amendment was passed and ratified. But women made...
Crash Course
What is Soil (and Why is it Important)?: Crash Course Geography
Soil brings together all four spheres of physical geography, and understanding soil composition is kind of like baking! So in today's episode, we're going to show you how to create the perfect soil cake, examine its different soil...
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The Yellow Wallpaper: Crash Course Literature 407
Today on Crash Course Literature, John Green teaches you about The Yellow Wallpaper, by Charlotte Perkins Gilman. The Yellow Wallpaper tells the story of a woman who is a prisoner in her own home, in the name of caring for her mental...
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Central Nervous System: Crash Course A&P
Today Hank talks about your central nervous system. In this episode we'll explore how your brain develops and how important location is for each of your brain's many functions. Table of Contents Central Nervous System, Location and Brain...
Crash Course
Conservation and Restoration Ecology: Crash Course Ecology
Hank wraps up the Crash Course on ecology by taking a look at the growing fields of conservation biology and restoration ecology, which use all the kung fu moves we've learned about in the past eleven weeks and apply them to protecting...
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The Seven Years War Crash Course World History
In which John teaches you about the Seven Years War, which may have lasted nine years. Or as many as 23. It was a very confusing was. The Seven Years War was a global war, fought on five continents, which is kind of a lot. John focuses...
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Revolutions in Science and Tech: Crash Course European History
In the decades following World War II, life changed in many ways, and a fair number of those changes were for the better. Many of those improvements were driven by advances in science and technology, in fields like biology,...
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How Are We All Part of Ending Outbreaks? Crash Course Outbreak Science
Over the course of this series, we've seen that outbreak science is actually MANY sciences, including biology, epidemiology, sociology, and even economics! Because outbreak science is an interdisciplinary field, everyone has a role to...
Crash Course
Supply and Demand: Crash Course Economics
In which Adriene Hill and Jacob Clifford teach you about one of the fundamental economic ideas, supply and demand. What is supply and demand? Well, you'll have to watch the video to really understand it, but it's kind of important for...
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Price Controls, Subsidies, and the Risks of Good Intentions: Crash Course Economics
So, during times of inflation or deflation, why doesn't the government just set prices? It sounds reasonable, but price ceilings or floors just don't work. Adriene and Jacob explain why. Subsidies, however, are a little different, and...
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Markets, Efficiency, and Price Signals: Crash Course Economics
Adriene and Jacob teach you all about markets. So, in free market(ish) economies like the United States and most of the world, markets are a big deal. Markets work to produce the stuff that consumers want, and that society needs. Today...
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The Underground Economy: Crash Course Econ
What is an underground economy? Whether you call it a black market, a grey market, or just the shop down the street, its about connecting people with goods outside of official channels. Some stuff happens in the underground economy...