In which John Green teaches you about the post-World War II breakup of most of the European empires. As you'll remember from previous installments of Crash Course, Europeans spent several centuries sailing around the world creating empires, despite the fact that most of the places they conquered were perfectly happy to carry on alone. After World War II, most of these empires collapsed. This is the story of those collapses. In most places, the end of empire was not orderly, and violence often ensued. While India was a (sort of) shining example of non-violent change, in places like The Congo, Egypt, Rwanda, Vietnam, Cambodia, and Laos, things didn't go smoothly at all. John brings you all this, plus pictures of Sea Monkeys. Sadly, they don't look anything like those awesome commercials in the comic books.

Chapters:
Introduction: Decolonization
What Happens When Empires Fall?
Post-WWII Decolonization
Decolonization in India
Mohandas K. Gandhi
An Open Letter to Hunger Strikers
Indonesian Nationalism
The End of Colonization in French Indochina (Vietnam, Laos, and Cambodia)
Gamal Abdul Nasser and Egyptian Nationalism
Decolonization in Central and Southern Africa
Credits

Finally, after what seems like eons and eons, the end is nigh. We're talking not only about the end of Crash Course Big History but also the end of everything. The end of humanity and the end of the universe. John and Hank Green will teach you about what the future holds for humanity and the universe. Spoiler alert: in the long, long, long, long, long, long term, it doesn't look good. In the short term though, it's not too bad. But don't lose hope, there is an upside. You'll have to watch the video to find out.

As we approach the end of Crash Course Astronomy, it’s time now to acknowledge that our Universe’s days are numbered. Stars will die out after a few trillion years, protons will decay and matter will dissolve after a thousand trillion trillion trillion years, black holes will evaporate after 10^92 years, and then all will be dark. But there is still hope that a new Universe will be born from it.

Chapters:
Introduction: The End of the Universe
Scientific Notation
The Five Ages of the Universe
The Primordial Era
The Stelliferous Era (You Are Here!)
The Degenerate Era
The Black Hole Era
The Dark Era
The Big Rip
Other Possibilities: Multiverses & The Cosmic Reboot
Review

How do con artists manage to scam millions? Why do people choose to follow great leaders, or horrible ones? How do CEOs get better deals in the boardroom? Influence. In this episode of Crash Course Business, Evelyn chats to us about what influence is, how to use it respectfully, and how to protect yourself against its darker uses.

What is debt? What is a deficit? And do these things have different outcomes for individuals and nations? Adriene and Jacob answer all these questions and more on this week's Crash Course Econ. Deficit and debt are easy to misunderstand, but luckily, they're also pretty easy to understand. This week we'll explain what deficit and debt are, and talk about what the sources of deficit and debt are for the US Government. Also, we'll take a very special trip to Cliffordonia to try and understand these concepts and get a look at what a colonial-era space program might have looked like.

Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically significant isn't always practically significant. And to measure that, we'll introduce another new concept - effect size.

In which John Green teaches you about the end of World History, and the end of the world as we know it, kind of. For the last hundred years or so, it seemed that one important ingredient for running an economically successful country was a western-style democratic government. All evidence pointed to the idea that capitalist representative democracies made for the best economic outcomes. It turns out that isn't the only way to succeed. In the last 40 years or so, authoritarian capitalism as it's practiced in places like China and Singapore has been working really, really well. John is going to look at these systems and talk about why they work, and he's even going to make a few predictions about the future. Also, thanks for watching this series. It has been amazingly fun to create, and we appreciate all of you.

Not sleeping for days on end. Long periods of euphoria. Racing thoughts. Grandiose ideas. Mania. Depression. All of these are symptoms of Bipolar Disorder. In this episode of Crash Course Psychology, Hank talks about mood disorders and their causes as well as how these disorders can impact people's lives.

Chapters:
Introduction: Bipolar Disorder
Mood Disorders
What are Moods?
Depressive Disorders
Bipolar Disorder
Genetic Causes of Mood Disorders
Environmental Triggers of Mood Disorders
Mood Disorders & Gender
Mood Disorders & the Brain
Social-Cognitive Perspective on Mood Disorders
Review & Credits
Credits

CALCULUS! Today we take our first steps into the language of Physics; mathematics. Every branch of science has its own way to describe the things that it investigates. And, with Physics, that's math. In this episode, Shini talks us through derivatives and how calculus helps us to understand the world around us.

Literally, ‘mise-en-scene’ means “placing on stage.” But in film, mise-en-scene encompasses everything the camera is capturing. The artists and crafts-people who work in Production Design, Wardrobe, and Hair and Makeup are responsible for setting the stage of a film and making sure the characters fit on that stage. In this episode of Crash Course Film Production, Lily Gladstone talks us through the roles involved in designing the world of a film.

Organic chemistry isn’t that different from an adventure game, with substrates as characters, nucleophiles as magic potions, and reaction conditions as different magical kingdoms. In this episode of Crash Course Organic Chemistry, we’ll learn the tricks to this game so that we can figure out which transformation, or mechanism, will occur when we combine any substrate with any nucleophile. Let’s go on an adventure!

What is social deviance? Who defines what is deviant and how to people come to behave that way? Today we’re going to explore biological and psychological approaches to explaining deviance, including what each perspective can bring to the table, and their inherent limitations. From there, we’ll explain the sociological perspective and the social foundations of deviance.

Have you ever wondered where cured meats like salami or pepperoni get their bright red color? Of course its from organic chemistry! A chemical called nitric acid gives them that bright color, while also increasing their shelf. It's also involved in some other interesting reactions. In this episode of Crash Course Organic Chemistry we'll see how nitrous acid reacts with primary amines to form diazonium salts, we'll learn about alkyldiazonium salts and aryldiazonium salts, and see what conditions are necessary for nucleophilic aromatic substitutions.

Going out in the sun can work wonders for your mood, but unfortunately too much UV exposure can do serious damage to your DNA. This damage occurs through a type of organic reaction called a pericyclic reaction. In this episode of Crash Course Organic Chemistry, we’ll explore pericyclic reactions to see how the sun can both give us life, and hurt us, and also look at other important pericyclic reactions, such as the Diels-Alder reaction.

Hank takes us through the bowels of the human digestive system and explains why it's all about surface area.

Chapters:
1) Surface Area to the Max!
2) Mouth to Esophagus
3) Stomach
4) Small Intestine
5) Large Intestine

Nachos are delicious. And versatile because today they're also going to help us learn a thing or two about your digestive system. Nachos can provide us with energy and raw materials, by first ingesting something nutritious, propelling it through the alimentary canal where it will be mechanically broken down, and chemically digested by enzymes until my cells can absorb their monomers and use them to make whatever they need. And eventually, there will be pooping.

Chapters:
Introduction: Why We Eat Food
Digestive System: Your Body's Disassembly Line
Structure of the Digestive System
Ingestion
Propulsion
Mechanical Breakdown
Digestion
Absorption
Defecation
Review
Credits

Nearly 200 years ago, Alexis St. Martin was shot in the stomach. He was saved by local army doctor William Beaumont but had to live out his remaining years with a gaping hole in the stomach -- allowing Beaumont to learn a lot about how human digestion works. So today we're going to walk you through that process. We'll cover how mechanical and chemical digestion starts in the mouth and continues in the stomach, where it’s pummeled by acids and enzymes and turned into chyme. We will also go over the stomach’s cephalic, gastric, and intestinal phases of digestive regulation.

Chapters:
Introduction: Alexis St. Martin's Stomach Hole
Digestion Starts in the Mouth
The Stomach
Stomach Acid
Phases of Digestive Regulation: Cephalic, Gastric, and Intestinal
The Mind-Stomach Connection
Review
Credits

Nachos are great...if you are among the lucky ones whose bodies can digest them. When digestion goes according to plan, the small intestine performs most of your chemical digestion in the duodenum, while accessory organs including the liver, gallbladder, and pancreas contribute enzymes that all but finish the job. Then your large intestine, which is actually shorter than the small intestine, tries to extract the last bit of nutrition, including the occasional attempt to turn nachos into energy, which for most humans, ends in gassy failure.

Chapters:
Introduction: Lactose Intolerance
The Small Intestine
Parts of the Small Intestine: Duodenum, Jejunum, Ileum
The Duodenum
The Liver
The Gallbladder
The Pancreas
The Large Intestine
Why Nachos Might Make You Gassy
How Do We Poop?
Review
Credits

Today, Craig is going to wrap up our discussion of discrimination by looking more closely at those “discrete and insular minorities” referenced in the 14th Amendment. We’ll talk about instances of discrimination of Asian, European, and Latino immigrants, Native Americans, non-English speakers, people with disabilities, and LGBT people. We’ll also talk about federal and state responses to this discrimination. It’s a lot to cover, and we’ll only scratch the surface of the battles these groups fought (and are still fighting) for equality, but we will give you some historical context for the discrimination that has occurred and the court decisioned made to help defend these groups.

Is it OK to discriminate? Do you do it? Is it always wrong or are there cases where it can be acceptable? Today we’re talking through several tricky cases and different philosophical perspectives on this issue.