At Crash Course, we believe that high-quality educational videos should be available to everyone for free! Subscribe for weekly videos from our current courses! The Crash Course team has produced more than 60 courses on a wide variety of subjects, ranging from the humanities to sciences and so much more! We also recently teamed up with Arizona State University to bring you more courses on the Study Hall channel.Links:Support us on Patreon!: http://patreon.com/crashcourseInstagram: https://www.instagram.com/crashcourseBluesky: https://bsky.app/profile/thecrashcourse.bsky.socialTikTok: https://www.tiktok.com/@crashcourseFacebook: http://www.facebook.com/YouTubeCrashCourse
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Nov 14, 2026 · 18:02
In which John Green teaches you about nonviolence and peace movements in the 20th century. What is nonviolence? What is a peace movement? Well. traditionally, humans often resort…
Nov 14, 2026 · 15:14
Today, in our final episode of Crash Course AI, we're going to look towards the future. We've spent much of this series explaining how and why we don't have the Artificial…
Nov 14, 2026 · 19:25
These days, we don't have to worry too much about meeting an early demise from ulcers, breaks in the stomach lining that could be fatal back in the early 1900s. This is because…
Nov 13, 2026 · 16:37
So, you know you'd like to get help with some problematic behavior (like fear of flying). What do you do? Who can you go to for help? Once you've gone, what can you expect? In…
Nov 13, 2026 · 5:27
Coming in February 2016, Hank hosts Crash Course Philosophy, produced in association with PBS Digital Studios.--PBS Digital Studios: http://youtube.com/pbsdigitalstudiosWant to…
Nov 13, 2026 · 18:15
Today we're (finally) going to talk about animal babies! But more than just puppies and piglets we're going to be looking at their genes. Sexual reproduction is part of the very…
Nov 13, 2026 · 12:29
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 Now that we're to the point of actually applying for college, things can…
Nov 13, 2026 · 21:23
Europe was in transition politically and culturally at the beginning of the 20th century. Today, we're looking at the dawn of modern science, and the rise of Modernism in the…
Nov 13, 2026 · 17:08
In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first, he has to tell…
Nov 13, 2026 · 1:04:39
Welcome to Crash Course Office Hours! Is the heart an organ? How does the nervous system work? In this livestream, Hank Green and Brandon Jackson answer the questions you…
Nov 13, 2026 · 12:59
So today we're going to look at the rather thorny issue of the media and its role in politics. Wether you're talking about older forms of media like newspapers and radio or newer…
Nov 13, 2026 · 15:14
In the late 19th and early 20th centuries, Black American Women were struggling with both racism and misogyny as they fought for their rights. Black Women formed clubs and…
Nov 13, 2026 · 15:12
What exactly are Personality Disorders? How can they be diagnosed? Can we prevent some of them? In this episode of Crash Course Psychology, Hank gives us the down-low on things…
Nov 13, 2026 · 21:15
Much has been written about what exactly caused World War I. As befits a true global war, the reality is that there isn't a single cause. There aren't even three causes. There…
Nov 13, 2026 · 14:47
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 Paying for college is stressful and there's a lot of research we need to…
Nov 13, 2026 · 14:39
Hank begins teaching you about your endocrine system by explaining how it uses glands to produce hormones. These hormones are either amino-acid based and water soluble, or…
Nov 13, 2026 · 21:29
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…
Nov 13, 2026 · 18:43
In which Hank and John Green teach you about life on Earth. They won't be giving advice on how life should be lived, because this is a history series. Instead, they'll teach you…
Nov 13, 2026 · 19:30
Europe's system of alliances and centuries-old tensions erupted into war in August of 1914. This week on Crash Course Euro, we're talking about the military history of World War…
Nov 13, 2026 · 18:41
A wide range of Americans contributed to the Civil Rights Movement in the 1950s and 1960s. Students and young people were prominent groups of activists within the movement.…
Nov 13, 2026 · 1:09:07
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…
Nov 13, 2026 · 14:29
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…
Nov 13, 2026 · 18:13
In which John Green teaches you about the Bronze Age civilization in what we today call the middle east, and how the vast, interconnected civilization that encompassed Egypt, The…
Nov 13, 2026 · 14:31
In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and…
Nov 13, 2026 · 19:21
World War I was a total war for millions of people in Europe. Many men were enlisted in the fighting, but the war work had implications for the daily lives of a huge number of…
Nov 13, 2026 · 17:15
Enslaved people resisted their condition in a range of different ways. Oftentimes those ways were small and personal. There were also times when that resistance took on larger,…
Nov 13, 2026 · 1:06:06
Welcome to Crash Course World History Office Hours! John Green and Cathy Keller answer your questions on the Russian Revolution, discuss the origin of nation states, and talk…
Nov 13, 2026 · 8:46
One last round of Hank's many struggles with words on the set of Anatomy & Physiology.***Crash Course is on Patreon! You can support us directly by signing up at…
Nov 13, 2026 · 19:47
In which John Green, Hank Green, and Emily Graslie teach you about our Sun and the formation of the planets. We're going to focus on the formation and development of the Earth…
Nov 13, 2026 · 16:38
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 Choosing majors can feel overwhelming and even confusing. It can feel…
Nov 13, 2026 · 19:30
World War I was very hard on the Russian Empire. So hard, in fact, that it led to the end of the Russian Empire. As the global conflict ground on, Tsar Nicholas II faced…
Nov 13, 2026 · 16:58
In this episode of Crash Course Psychology, Hank describes some of the most misunderstood psychological disorders out there: Schizophrenia and Dissociative Identity Disorder.…
Nov 13, 2026 · 19:39
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…
Nov 13, 2026 · 13:11
So last week we talked about what special interest groups are and how they influence the political system, and today we’re going to focus on why we even have them in the first…
Nov 13, 2026 · 16:30
People have been migrating and transplanting since before recorded history, and understanding the reasons why people migrate can help explain some of the cultural, economic, and…
Nov 13, 2026 · 7:14
In which Craig Benzine tries to say certiorari. Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudiosSupport is provided by Voqal:…
Nov 13, 2026 · 20:02
In which John Green looks at Europe's attempts to recover from the devastation of World War I and forge a lasting peace. The peace did not last. Today we're talking about the…
Nov 13, 2026 · 19:51
In which John Green, Hank Green, and Emily Graslie teach you about what happened in the Universe after the big bang. They'll teach you about cosmic background radiation, how a…
Nov 13, 2026 · 13:35
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 Now that we have a better grasp on chosing majors, let's talk a little…
Nov 13, 2026 · 17:50
Thanks to the wonders of physics, astronomers can map a timeline of the universe’s history. Today, Phil’s going to give you an overview of those first few minutes (yes, MINUTES)…
Nov 13, 2026 · 15:05
So, what do Batman and J.R.R. Tolkien have in common? Post Traumatic Stress Disorder. It used to be called "Shellshock" and it can be really really really destructive. In this…
Nov 13, 2026 · 12:39
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 One of the most challenging parts of going to college is feeling like you…
Nov 13, 2026 · 22:48
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…
Nov 13, 2026 · 15:10
In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did…
Nov 13, 2026 · 14:17
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…
Nov 13, 2026 · 16:15
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…
Nov 13, 2026 · 19:02
Many organizations have made it their mission to expand the rights of Black Americans. The NAACP and the Urban League are examples of influential organizations with long…
Nov 13, 2026 · 15:11
We continue our tour of the nervous system by looking at synapses and the crazy stuff cocaine does to your brain.Pssst... we made flashcards to help you review the content in…
Nov 13, 2026 · 22:29
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…
Nov 13, 2026 · 19:39
In which John Green, Hank Green, and Emily Graslie teach you about, well, everything. Big History is the history of everything. We're going to start with the Big Bang, take you…
Nov 13, 2026 · 12:54
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 Sometimes you realize the school you're attending just isn't right for…
Nov 13, 2026 · 8:29
After 47 episodes, Hank still can't really say "epithelial."***Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourseThanks…
Nov 13, 2026 · 8:16
In this episode of Crash Course Psychology, Hank has trouble saying the words and posits a world in which he can be hypnotized to forget things just so he can enjoy them all over…
Nov 13, 2026 · 12:20
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 Working in college is necessary sometimes. Whether it's for experience,…
Nov 13, 2026 · 17:08
Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long…
Nov 13, 2026 · 19:39
Our look at World War II continues with a closer examination of just how the war impacted soldiers in the field, and the people at home. For many of the combatants, the homefront…
Nov 13, 2026 · 13:24
In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August…
Nov 13, 2026 · 16:41
When outbreaks happen, we need to be able to predict the course they’ll take in the future, but of course we can’t run experiments on real people to figure that out. Thankfully…
Nov 13, 2026 · 13:51
THE FINAL SHOWDOWN! This is the last episode on the immune system and also the very last episode of Crash Course Anatomy & Physiology. In it, Hank explains how the cellular…
Nov 13, 2026 · 16:19
Women have been a powerful (and largely underappreciated) force in the movement for Black equality in the United States. The Black Power Movement is no exception to that trend.…
Nov 13, 2026 · 14:14
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…
Nov 13, 2026 · 18:53
During World War II, Nazi Germany undertook the imprisonment and summary execution of many of its own citizens, and citizens of the nations they occupied. One of the groups that…
Nov 13, 2026 · 13:21
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 There is a lot of stress and anxiety around college, whether you're fresh…
Nov 13, 2026 · 14:51
In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct.…
Nov 13, 2026 · 12:27
Today, Craig is going to talk about something you fans out there have been demanding for months - money in politics. Specifically, we're going to talk about special interest…
Nov 13, 2026 · 14:44
In which John Green teaches you a little bit about drought, which is a natural weather phenomenon, and famine, which is almost always the result of human activity. Throughout…
Nov 13, 2026 · 19:12
Check-out Bizarre Beast to learn more about the Man O'War and other bizarre animals: https://www.youtube.com/bizarrebeastsSocial behavior like caring for our young, fighting off…
Nov 13, 2026 · 20:00
Sometimes, friendship isn't forever. At the conclusion of World War II, the old structures of power were a shambles. The traditional European powers were greatly weakened by…
Nov 13, 2026 · 13:46
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 So... you may think that graduating from college is automatic, but it's…
Nov 13, 2026 · 14:51
Is the world overpopulated or underpopulated? While we worry about there being too many people for the planet to support, we can also worry about how fewer people in a given…
Nov 13, 2026 · 16:37
The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy…
Nov 13, 2026 · 16:46
In this episode of Crash Course Psychology, Hank talks about OCD and anxiety disorders in the hope we'll understand what people with actual OCD have to deal with as well as how…
Nov 13, 2026 · 16:45
Today, Clint Smith is teaching you about the Civil Rights activist and Icon, Reverend Jesse Jackson. Jackson began his career working with Martin Luther King in the 1960s, and in…
Nov 13, 2026 · 6:48
Welcome to Crash Course Organic Chemistry hosted by Deboki Chakravarti! Starting next week, we'll be tackling the notoriously complicated subject of organic chemistry, and…
Nov 13, 2026 · 12:42
This week Craig Benzine clears up the role of committees in Congress. We’ll talk about standing committees, joint committees, conference committees, and caucuses (and not the…
Nov 12, 2026 · 17:13
Today we’re learning about Marsha P. Johnson and the Stonewall rebellion. Serving as a pivotal moment in the modern Gay Rights Movement, Stonewall began on June 28th, 1969, and…
Nov 12, 2026 · 13:58
In the penultimate episode of Crash Course Anatomy & Physiology, Hank explains your adaptive immune system. The adaptive immune system's humoral response guards extracellular…
Nov 12, 2026 · 16:18
In this episode of Crash Course Psychology, Hank takes a look at WAIS and WISC intelligence tests and how bias can really skew both results and the usefulness of those results.…
Nov 12, 2026 · 11:35
In which Stan Muller subs for John Green and teaches you about energy and humanity. Today we discuss the ideas put forth by Alfred Crosby in his book, Children of the Sun.…
Nov 12, 2026 · 14:30
Organic chemistry is pretty much everywhere! In this episode of Crash Course Organic Chemistry, we’re talking about the amazing diversity among organic molecules. We’ll learn…
Nov 12, 2026 · 17:57
Today, we are going to begin our discussion on the determinants of health which are all of the conditions we are born, live, and work in that have an influence on our overall…
Nov 12, 2026 · 13:52
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 So, you did it! You're done and now you need to look beyond college.…
Nov 12, 2026 · 16:48
This week Jacob and Adriene teach you about marginal analysis, which you're using RIGHT NOW! The video is coming from inside the house! Or something. You'll learn how marginal…
Nov 12, 2026 · 14:24
In this episode of Crash Course Psychology, Hank takes a look at how the treatment for psychological disorders has changed over the last hundred years and who is responsible for…
Nov 12, 2026 · 16:51
In which John Green teaches you about disease and the effects that disease has had in human history. Disease has been with man since the beginning, and it has shaped the way…
Nov 12, 2026 · 6:36
Apple Devices: https://apps.apple.com/us/app/crash-course-watch-and-study/id1505594172Android Devices: https://play.google.com/store/apps/details?id=com.complexly.thecrashcourse&h…
Nov 12, 2026 · 12:55
You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 If you've taken out student loans, graduation can start a ticking clock…
Nov 12, 2026 · 19:39
There is no denying the effect that our environment has on us. Things like water and air pollution are detrimental to our health. In this episode of Crash Course Public Health,…
Nov 12, 2026 · 15:02
Today, Craig is going to dive into the history of American political parties. So throughout most of United States history our political system has been dominated by a two-party…
Nov 12, 2026 · 14:54
Hank calls in a friend to do his push-ups for him today to explain how skeletal muscles work together to create and reverse movements. Hank and Claire also demonstrate the role…
Nov 12, 2026 · 22:11
At the end of World War II, the nations of Europe were a shambles. Today we'll learn about how the various countries and blocs approached the problem of rebuilding their…
Nov 12, 2026 · 17:54
In 1910, 90% of Black Americans lived in the South. By 1940, around 1.5 million Black Americans had left their homes, and 77% lived in the South. By 1970, 52% of Black Americans…
Nov 12, 2026 · 14:22
In which John Green teaches you about the Little Ice Age. The Little Ice Age was a period of global cooling that occurred from the 13th to the 19th centuries. This cooling was…
Nov 12, 2026 · 16:46
In which John Green teaches you about the poetry of Langston Hughes. Langston Hughes was a poet and playwright in the first half of the 20th century, and he was involved in the…
Nov 12, 2026 · 17:53
So, how many different kinds of intelligence are there? And what is the G-Factor? Eugenics? Have you ever taken an IQ Test? All of these things play into the fascinating and…
Nov 12, 2026 · 18:19
The War on Drugs is a decades-long United States policy intended to curb illegal drug use and trafficking. Long story short: it has not worked to reduce drug use or trade, and…
Nov 12, 2026 · 18:35
In the final episode of Crash Course Black American History, Clint Smith teaches you about the Black Lives Matter movement. We'll discuss some of the major events that…
Nov 12, 2026 · 18:37
Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly it's expanding also allows us to…
Nov 12, 2026 · 18:47
In which John Green teaches you about what westerners call the middle ages and the lives of the aristocracy...in Japan. The Heian period in Japan lasted from 794CE to 1185CE, and…
Nov 12, 2026 · 16:50
Sex is complicated for different reasons in different cultures. But, it's the entire purpose of life, so there's no reason to blush. In this episode of Crash Course Psychology,…
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