In which John Green teaches you about the Cold War as it unfolded in Asia. As John pointed out last week, the Cold War was occasionally hot, and a lot of that heat was generated in Asia. This is starting to sound weird with the hot/cold thing, so let's just say that the United States' struggle against communist expansion escalated to a full-blown, boots-on-the-ground war in Korea and Vietnam. In both of these cases, the United States sent soldiers to intervene in civil wars that it looked like communists might win. That's a bit of a simplification, but John will explain it all to you.

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. While The Vietnam War was happening very far away from home, it had a major impact on American soldiers and civilians: https://www.commonlit.org/text....s/introduction-to-th

Americans with televisions had the war broadcasted right into their living rooms, leading to an immense Vietnam War resistance effort: https://www.commonlit.org/text....s/resistance-to-the-

Want to learn more about the Cold War? Check out these other videos from Crash Course:
USA vs USSR Fight! The Cold War: Crash Course World History #39:
https://www.youtube.com/watch?v=y9HjvHZfCUI

The Cold War: Crash Course US History #37:
https://www.youtube.com/watch?v=9C72ISMF_D0

George HW Bush and the End of the Cold War: Crash Course US History #44:
https://www.youtube.com/watch?v=L-K19rVDxoM

The Cold War and Consumerism: Crash Course Computer Science #24:
https://www.youtube.com/watch?v=m8i38Yq1wX4

Post-War Rebuilding and the Cold War: Crash Course European History #41:
https://www.youtube.com/watch?v=-rkIqtV07HE

Chapters:
Introduction: The Cold War in Asia 00:00
The Korean War 0:28
Eisenhower's Election 3:05
Cost of the Korean War 3:20
Mystery Document 4:18
Ho Chi Minh 5:19
American Involvement in Vietnam 5:55
The Gulf of Tonkin Incident 7:02
Operation Rolling Thunder 8:13
Fighting in Vietnam 8:41
Public Opinion and the Vietnam War 9:38
Nixon's Plan to Leave Vietnam 10:34
Anti-War Sentiments 11:19
The End of the Vietnam War 11:52
Credits 13:09
--
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In which John Green teaches you about American involvement in World War I, which at the time was called the Great War. They didn't know there was going to be a second one, though they probably should have guessed, 'cause this one didn't wrap up very neatly. So, the United States stayed out of World War I at first, because Americans were in an isolationist mood in the early 20th century. That didn't last though, as the affronts piled up and drew the US into the war. Spoiler alert: the Lusitania was sunk two years before we joined the war, so that wasn't the sole cause for our jumping in. It was part of it though, as was the Zimmerman telegram, unrestricted submarine warfare, and our affinity for the Brits. You'll learn the war's effects on the home front, some of Woodrow Wilson's XIV Points, and just how the war ended up expanding the power of the government in Americans' lives.

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. The complex secret alliances of Europe led to World War I: https://www.commonlit.org/text....s/a-mad-dash-to-disa
It took several years before Americans joined the war: https://www.commonlit.org/text....s/to-the-front-lines
After the war, President Woodrow Wilson wanted to prevent a future World War, and promoted creating a League of Nations, established following the Treaty of Versailles: https://www.commonlit.org/text....s/the-treaty-of-vers

Chapters:
Introduction 00:00
American Involvement in WWI 0:41
The Sinking of the Lusitania 1:53
Why did the U.S. join WWI? 2:42
Mystery Document 3:22
America's Contributions to WWI 5:06
Pro-War Progressives 5:48
How WWI Expanded the U.S. Government's Power 6:08
Propaganda, Public Opinion, and the CPI 7:10
The Espionage Act of 1917 7:57
The Sedition Act 8:34
"Americanization" 9:55
Suppression of Free Speech 10:40
Positive Outcomes of WWI 11:18
The End of WWI 12:17
Credits 13:06

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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 histories. But a long history or extensive membership isn't always necessary to have an impact. Today, we'll learn about the Black Panthers. They were a relatively small, relatively short-lived political party that had an outsized impact on US history.

Clint's book, How the Word is Passed is available now! https://bookshop.org/books/how....-the-word-is-passed-

Sources and References
Peniel E. Joseph, Waiting ’ Til the Midnight Hour: A Narrative History of Black Power in America (New York: Henry Holt, 2006).
Malcolm X, The Autobiography of Malcolm X, With the assistance of Alex Haley (New York: Ballantine, 1992).
Manning Marable, Malcolm X: A Life of Reinvention (New York: Viking Press, 2011).
Ilyasah Shabazz, Growing up X: A Memoir by the Mother of Malcolm X (Penguin, 2003).
Robyn Spencer, The Revolution Has Come: Black Power, Gender, and the Black Panther Party in Oakland (Duke University Press, 2016).

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Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Justin Snyder, April Frazier, Dave Freeman, Hasan Jamal, DL Singfield, Jeremy Mysliwiec, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Vincent, Michael Wang, Stacey Gillespie (Stacey J), Burt Humburg, Aziz Y, Shanta, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Rachel Creager, Breanna Bosso, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, team dorsey, Trevin Beattie, Divonne Holmes à Court, Eric Koslow, Jennifer Dineen, Indika Siriwardena, Khaled El Shalakany, Jason Rostoker, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, Les Aker, ClareG, Rizwan Kassim, Constance Urist, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks
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In which John Green teaches you where American politicians come from. In the beginning, soon after the US constitution was adopted, politics were pretty non-existent. George Washington was elected president with no opposition, everything was new and exciting, and everyone just got along. For several months. Then the contentious debate about the nature of the United States began, and it continues to this day. Washington and his lackey/handler Alexander Hamilton pursued an elitist program of federalism. They attempted to strengthen the central government, create a strong nation-state, and leave less of the governance to the states, They wanted to create debt, encourage manufacturing, and really modernize the new nation/ The opposition, creatively known as the anti-federalists, wanted to build some kind of agrarian pseudo-paradise where every (white) man could have his own farm, and live a free, self-reliant life. The founding father who epitomized this view was Thomas Jefferson. By the time Adams became president, the anti-federalists had gotten the memo about how alienating a name like anti-federalist can be. It's so much more appealing to voters if your party is for something rather than being defined by what you're against, you know? In any case, Jefferson and his acolytes changed their name to the Democratic-Republican Party, which covered a lot of bases, and proceeded to protest nearly everything Adams did. Lest you think this week is all boring politics, you'll be thrilled to hear this episode has a Whiskey Rebellion, a Quasi-War, anti-French sentiment, some controversial treaties, and something called the XYZ Affair, which sounds very exciting. Learn all about it this week with John Green.

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. Much of America's politics came from debates between democratic republican Thomas Jefferson and federalist Alexander Hamilton: https://www.commonlit.org/texts/alexander-hamilton
While Jefferson would go on to become president, Hamilton heavily influenced President George Washington who set many American political ideals in his farewell address that Hamilton helped craft: https://www.commonlit.org/text....s/washington-s-farew

Chapters:
Introduction 00:00
Alexander Hamilton's Vision for America 0:26
Thomas Jefferson's Vision for America 2:10
Democratic-Republicans vs. Federalists 3:32
George Washington and the First U.S. Presidential Election 4:33
Hamilton's Five-Point Plan 5:04
Republican Opposition to Hamilton's Economic Plan 6:20
The Whiskey Rebellion 7:02
Early U.S. Foreign Affairs 7:31
The End of Washington's Presidency 8:36
Mystery Document 9:21
John Adams' Presidency 10:48
The Alien and Sedition Acts 11:56
Credits 13:24
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

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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 Europeans. Women entered the workforce in huge numbers, and for a lot of people, the battles raged through their towns, cities, and even their homes.

In addition to learning about the homefronts of the war, we're going to look at how the war ended, and how the Paris Peace Conference and the treaties that resulted did little to heal the societal wounds of the war, and in many ways set the stage for the next big war.

Sources

-Akin, Yigit. “War, Women, and the State: The Politics of Sacrifice in the Ottoman Empire during the First World War,” Journal of Women’s History. Vol. 26, No. 3 (Fall 2014).
-Gerwarth, Robert. The Vanquished: Why the First World War Failed to End. New York: Farrar, Straus, and Giroux, 2016.
-Hunt, Lynn et al. Making of the West: Peoples and Cultures, 5th ed. Boston: Bedford St. Martin’s, 2016.
-McMeekin, Sean. The Ottoman Endgame: War, Revolution, and the Making of the Modern Middle East, 1908-1923. New York: Penguin, 2015.
-Sanborn, Joshua A. Imperial Apocalypse: The Great War and the Destruction of the Russian Empire. Oxford: Oxford University Press, 2014.

***

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Eric Prestemon, Sam Buck, Mark Brouwer, Efrain R. Pedroza, Matthew Curls, Indika Siriwardena, Avi Yashchin, Timothy J Kwist, Brian Thomas Gossett, Haixiang N/A Liu, Jonathan Zbikowski, Siobhan Sabino, Jennifer Killen, Nathan Catchings, Brandon Westmoreland, dorsey, Kenneth F Penttinen, Trevin Beattie, Erika & Alexa Saur, Justin Zingsheim, Jessica Wode, Tom Trval, Jason Saslow, Nathan Taylor, Khaled El Shalakany, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Caleb Weeks, Tim Curwick, David Noe, Shawn Arnold, William McGraw, Andrei Krishkevich, Rachel Bright, Jirat, Ian Dundore
--

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#crashcourse #europeanhistory #worldwarI

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 Conference, the March on Washington in 1963, his work toward the Civil Rights and Voting Rights Acts of the mid-1960s, and his assassination in 1968, Dr. King is very broadly known. But maybe he isn't that well understood. Like many extremely famous people, Martin Luther King can sometimes be drawn as a bit of a flat character, and his ideas can be reduced to platitudes. Today we'll try to give you a fuller picture of the man and leader he was.

Clint's book, How the Word is Passed is available now! https://bookshop.org/a/3859/9780316492935

SOURCES:
Rustin, “Montgomery Diary,” Liberation (April 1956): 7–10.
D’Emilio, Lost Prophet, 2003.
King to Edward P. Gotlieb, 18 March 1960, in Papers 5:390–391.


Watch our videos and review your learning with the Crash Course App!
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Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
April Frazier, Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Vincent, Michael Wang, Stacey Gillespie (Stacey J), Alexis B, Burt Humburg, Aziz Y, Shanta, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Rachel Creager, Breanna Bosso, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, team dorsey, Trevin Beattie, Divonne Holmes à Court, Eric Koslow, Jennifer Dineen, Indika Siriwardena, Khaled El Shalakany, Jason Rostoker, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, Les Aker, ClareG, Rizwan Kassim, Sam Ferguson, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks
__

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Today, we're going to talk about how the Earth moves, but to do that, we're going to have to go way back to the early days of the galaxy! Processes that happened before the Earth even formed have led us to the geographic patterns and processes that create Earth's environments and support all living things. We'll talk about how the Earth rotates, the effects of it being slightly tilted, how events like sea ice melting impact how the Earth wobbles, and of course talk about how our elliptical orbit gives us seasons. So many of our life decisions are influenced by the motion of Earth. It guides where we decide to live, what food we eat, or even what weather we experience - which we'll talk about more next time.

Watch our videos and review your learning with the Crash Course App!
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Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Eric Prestemon, Mark, DAVID MORTON HUDSON, Perry Joyce, Isaac Liu, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Eric Koslow, Indika Siriwardena, Khaled El Shalakany, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, William McGraw, Jirat, Brian Thomas Gossett, Ian Dundore, Jason A Saslow, Jessica Wode, Caleb Weeks
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#CrashCourse #Geography

In which John Green teaches you about the Gilded Age and its politics. What, you may ask, is the Gilded Age? The term comes from a book by Mark Twain and Charles Dudley Warner titled, "The Gilded Age." You may see a pattern emerging here. It started in the 1870s and continued on until the turn of the 20th century. The era is called Gilded because of the massive inequality that existed in the United States. Gilded Age politics were marked by a number of phenomena, most of them having to do with corruption. On the local and state level, political machines wielded enormous power. John gets into details about the most famous political machine, Tammany Hall. Tammany Hall ran New York City for a long, long time, notably under Boss Tweed. Graft, kickbacks, and voter fraud were rampant, but not just at the local level. Ulysses S. Grant ran one of the most scandalous presidential administrations in U.S. history, and John will tell you about two of the best-known scandals, the Credit Mobilier scandal, and the Whiskey Ring. There were a few attempts at reform during this time, notably the Civil Service Act of 1883 and the Sherman Anti-trust act of 1890. John will also get into the Grange Movement of the western farmers, and the Populist Party that arose from that movement. The Populists, who threw in their lot with William Jennings Bryan, never managed to get it together and win a presidency, and they faded after 1896. This brings us to the Progressive Era, which we'll get into in the next episode!

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. The Gilded Age was marked by the success of the richest coupled with inequality and corruption. Repeated factory disasters, such as the triangle shirtwaist factory fire revealed the unsafe working conditions of the urban poor: https://www.commonlit.org/text....s/the-triangle-shirt
Meanwhile, workers began to join unions and strike for better working conditions: https://www.commonlit.org/text....s/the-coeur-d-alene-

Chapters:
Introduction: The Gilded Age 00:00
The Political Machine 1:23
Mystery Document 1:56
"Boss" Tweed & the County Courthouse 3:07
Tammany Politicians 4:11
Credit Mobilier & Bribing Congress 5:18
The Whiskey Ring 6:08
Gilded Age Republicans 6:46
The Civil Service Act & the Sherman Anti-Trust Act 7:27
Local Government Reforms 8:07
The Farmers' Alliance 8:46
The People's (Populist) Party 9:36
Populist Leaders 11:15
William Jennings Bryan's Presidential Campaign 11:42
Credits 13:19


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Dihydrogen monoxide (better known as water) is the key to nearly everything. It falls from the sky, makes up 60% of our bodies, and just about every chemical process related to life takes place with it or in it. Without it, none of the chemical reactions that keep us alive would happen - none of the reactions that sustain any life form on earth would happen - and the majority of inorganic chemical reactions that shape the surface of the earth would not happen either. Every one of us uses water for all kinds of chemistry every day - our body chemistry, our food chemistry, and our laundry chemistry all take place in water.

In today's Crash Course Chemistry, we use Hank's actual dirty laundry (ew) to learn about some of the properties of water that make it so special - its polarity and dielectric property; how electrolytes can be used to classify solutions; and we discover how to calculate a solution's molarity as well as how to dilute a solution using the dilution equation.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
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Table of Contents
Polarity 02:40
Dielectric Property 04:13
Electrolytes 04:29
Molarity 08:46
Dilution 10:56

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In which John Green teaches you about the (English) colonies in what is now the United States. He covers the first permanent English colony at Jamestown, Virginia, the various theocracies in Massachusetts, the feudal kingdom in Maryland, and even a bit about the spooky lost colony at Roanoke Island. What were the English doing in America, anyway? Lots of stuff. In Virginia, the colonists were largely there to make money. In Maryland, the idea was to create a colony for Catholics who wanted to be serfs of the Lords Baltimore. In Massachusetts, the Pilgrims and Puritans came to America to find a place where they could freely persecute those who didn't share their beliefs. But there was a healthy profit motive in Massachusetts as well. Profits were thin at first, and so were the colonists. Trouble growing food and trouble with the Natives kept the early colonies from success. Before long though, the colonists started cultivating tobacco, which was a win for everyone involved if you ignore the lung cancer angle. So kick back, light up a smoke, and learn how America became profitable. DON'T SMOKE, THOUGH! THAT WAS A JOKE!

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. Modern Native Americans have varied perspectives on Thanksgiving and the start of European colonization in America. Chuck Larsen's Plymouth Thanksgiving Story reveals a new native and anthropological take on the famous first Thanksgiving meal: https://www.commonlit.org/text....s/the-plymouth-thank

Chapters:
Introduction 00:00
Jamestown, Virginia: The First Successful English Colony 0:43
The Headright System, Indentured Servants, and Slavery in Jamestown 2:20
Tobacco Plantations in the Virginia Colony 3:10
Class Structure in the Virginia Colony 3:54
The Maryland Colony 4:38
The Massachusetts Bay Colony 5:07
Pilgrims, the Mayflower, and the First Thanksgiving 5:27
Governance in the Massachusetts Bay Colony 7:25
Mystery Document 8:01
"City on a Hill" 9:20
Equality and Representation in the Massachusetts Bay Colony 9:50
Credits 11:53

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In the aftermath of the revolutions and upheaval in 18th and early 19th century Europe, there was a hunger for reform across the continent. Reformers like Robert Owen, Charles Fourier, and Auguste Comte proposed radical new ideas, and at the same time, regular people began to stand up and ask for greater equality, and a louder voice in how they were governed. Results were mixed, but a lot of the ideas that emerged during this time are still echoing in our world today.

Sources

-Hosking, Geoffrey. Russia: People and Empire. Cambridge: Harvard University Press, 1997.
-Hunt, Lynn et al. The Making of the West: Peoples and Cultures. 6th ed. Boston: Bedford St. Martin’s, 2019.
-Judson, Pieter M. The Hapsburg Empire: A New History. Cambridge: Harvard University Press,
-Kent, Susan Kingsley. A New History of Britain: Four Nations and an Empire. New York: Oxford University Press, 2017.
-Sperber, Jonathan. Revolutionary Europe 1780-1850. 2nd ed. London: Routledge, 2017.

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Eric Prestemon, Sam Buck, Mark Brouwer, Indika Siriwardena, Avi Yashchin, Timothy J Kwist, Brian Thomas Gossett, Haixiang N/A Liu, Jonathan Zbikowski, Siobhan Sabino, Zach Van Stanley, Jennifer Killen, Nathan Catchings, Brandon Westmoreland, dorsey, Kenneth F Penttinen, Trevin Beattie, Erika & Alexa Saur, Justin Zingsheim, Jessica Wode, Tom Trval, Jason Saslow, Nathan Taylor, Khaled El Shalakany, SR Foxley, Sam Ferguson, Yasenia Cruz, Eric Koslow, Tim Curwick, David Noe, Shawn Arnold, William McGraw, Andrei Krishkevich, Rachel Bright, Jirat, Ian Dundore
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#crashcourse #history #europeanhistory

In which John compares and contrasts Greek civilization and the Persian Empire. Of course, we're glad that Greek civilization spawned modern western civilization, right? Maybe not. From Socrates and Plato to Darius and Xerxes, John explains two of the great powers of the ancient world, all WITHOUT the use of footage from 300.

Chapters:
Introduction 00:00
The Persian Empire 0:39
An Open Letter to Aristophanes 3:33
Ionian Greek City-States 5:04
The Persian Wars 5:44
The Peloponnesian War 7:21
Did the Right Side Win the Persian Wars? 9:09
Credits 11:09

Resources:
The Histories of Herodotus: http://goo.gl/I1TM9u
Plato: http://goo.gl/GEcfWX
Plays of Aristophanes: http://goo.gl/xzb9Ff

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In which John Green examines the French Revolution, and gets into how and why it differed from the American Revolution. Was it the serial authoritarian regimes? The guillotine? The Reign of Terror? All of this and more contributed to the French Revolution not being quite as revolutionary as it could have been. France endured multiple constitutions, the heads of heads of state literally rolled, and then they ended up with a megalomaniacal little emperor by the name of Napoleon. But how did all of this change the world, and how did it lead to other, more successful revolutions around the world? Watch this video and find out. Spoiler alert: Marie Antoinette never said, "Let them eat cake." Sorry.

Chapters:
Introduction: The French Revolution 00:00
The French Declare Bankruptcy 0:41
Ancien Régime, Estates General, and the National Assembly 2:05
Declaration of Rights of Man and Citizen 3:16
Louis XVI, Marie Antionette, and the Women's March 4:00
The Jacobins 4:43
Austria and Prussia Intervene 5:35
An Open Letter to the Guillotine 6:48
Guillotines Galore 7:35
Napoleon Bonaparte 8:23
How Revolutionary was the French Revolution? 9:44
Credits 11:22

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In which Hank does some push-ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP.

Special thanks go to Stafford Fitness (www.staffordfitness.net) for allowing us to shoot the gym scenes in their facilities.

This video uses sounds from Freesound.org

Table of Contents:
1) Cellular Respiration 01:00
2) Adenosine Triphosphate 01:29
3) Glycolysis 4:13
A) Pyruvate Molecules 5:00
B) Anaerobic Respiration/Fermentation 5:33
C) Aerobic Respiration 6:45
4) Krebs Cycle 7:06
A) Acetyl COA 7:38
B) Oxaloacetic Acid 8:21
C) Biolography: Hans Krebs 8:37
D) NAD/FAD 9:48
5) Electron Transport Chain 10:55
6) Check the Math 12:33

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In which John Green teaches you, at long last, about the most exceptional bunch of empire-building nomads in the history of the world, the Mongols! How did the Mongols go from being a relatively small band of herders who occasionally engaged in some light hunting-gathering to being one of the most formidable fighting forces in the world? It turns out Genghis Khan was a pretty big part of it, but you probably already knew that. The more interesting questions might be, what kind of rulers were they, and what effect did their empire have on the world we know today? Find out, as John FINALLY teaches you about the Mongols.

Chapters:
Introduction: Wait for it...The Mongols! 00:00
What does it mean to be a nomad? 1:13
Genghis Khan 2:39
An Open Letter to Genghis Khan's Descendants 4:45
The Mongols After Genghis Khan 5:30
Five Reasons the Mongols Were Awesome 6:54
Five Reasons the Mongols Weren't Awesome 8:30
Credits 10:34

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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 likely caused by a number of factors, including unusual solar activity and volcanic eruptions. The Little Ice Age greatly impacted human social orders, especially during the 17th century. When the climate changed, and the weather became unpredictable, the world changed profoundly. Poor harvests led to hunger, which led to even less productivity, which even resulted in violent upheaval in a lot of places. All this from a little change in the temperature? Definitely.

Reference:
Global Crisis by Geoffrey Parker: https://bit.ly/3M99AvQ

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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 00:00
What Happens When Empires Fall? 0:33
Post-WWII Decolonization 2:24
Decolonization in India 3:14
Mohandas K. Gandhi 3:47
An Open Letter to Hunger Strikers 5:43
Indonesian Nationalism 6:40
The End of Colonization in French Indochina (Vietnam, Laos, and Cambodia) 7:51
Gamal Abdul Nasser and Egyptian Nationalism 8:35
Decolonization in Central and Southern Africa 9:16
Credits 12:10

Resources:
The Columbia History of the 20th Century https://bit.ly/3xrdpZ9

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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 a lot of other gains in the 30 years between 1890 and 1920. More women joined the workforce, they acquired lots of other legal rights related to property, and they also became key consumers in the industrial economy. Women also continued to play a vital role in reform movements. Sadly, they got Prohibition enacted in the US, but they did a lot of good stuff, too. The field of social work emerged as women like Jane Addams created settlement houses to assist immigrants in their integration into the United States. Women also began to work to make birth control widely available. You'll learn about famous reformers and activists like Alice Paul, Margaret Sanger, and Emma Goldman, among others.

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. Suffragists faced a decades-long debate on women’s right to vote: https://www.commonlit.org/text....s/address-to-congres
While it was a hard fight to get the vote, women eventually received suffrage in 1920: https://www.commonlit.org/text....s/was-hard-fight-to-

Chapters:
Introduction: Women in the Progressive Era 00:00
The Women's Era 1:01
The Women's Christian Temperance Union 1:54
The Role of Women in Politics During the Progressive Era 2:52
National Consumers League 3:15
Women Working Outside the Home 4:08
Mystery Document 4:58
Birth Control 5:57
Why Access to Birth Control Matters 7:07
Jane Addams & The Settlement House Movement 7:47
Women and Electoral Politics 8:13
The 19th Amendment 8:42
The Suffrage Movement 9:03
The National Women's Party 9:44
The Equal Rights Amendment 11:03
The Legacy of the Suffragettes 12:13
Credits 13:00

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Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system. The Kuiper Belt is a donut shape aligned with the plane of the solar system; the scattered disk is more eccentric and is the source of short-period comets, and the Oort Cloud which surrounds the solar system out to great distances is the source of long-period comets. These bodies all probably formed closer to the Sun and got flung out to the solar system’s suburbs by gravitational interactions with the outer planets.

Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/product....s/crashcourse-astron

--

Chapters:
Introduction: Where Do Comets Come From? 00:00
Kuiper Belt, Scattered Disk, and Oort Cloud 2:52
Long-Period Comets come from the Oort Cloud 4:03
Short-Period Comets come from the Scattered Disk 4:27
Pluto, Plutinos, and other Kuiper Belt Objects 4:47
Oort Cloud Objects 8:25
Review 10:38
--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

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--

PHOTOS/VIDEOS
HD Long Exposure Star Timelapse https://vimeo.com/34172172 [credit: Jeffrey Beach, Beachfront B-Roll]
Fine Structure in the Comet’s Jets http://blogs.esa.int/rosetta/2....015/01/16/fine-struc http://en.wikipedia.org/wiki/P....rotoplanetary_disk#m [credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA]
Artist's impression of a protoplanetary disk. [credit: ESO/L. Calçada - ESO]
Creating Gas Giants http://svs.gsfc.nasa.gov/cgi-b....in/details.cgi?aid=1 [credit: NASA's Goddard Space Flight Center]
What is a Sungrazing Comet? http://svs.gsfc.nasa.gov/cgi-b....in/details.cgi?aid=1 [credit: NASA's Goddard Space Flight Center]
Pluto/Neptune Orbit http://www2.jpl.nasa.gov/files..../images/browse/pluto [credit: NASA]
1992 QB1 http://solarsystem.nasa.gov/mu....ltimedia/gallery/199 [credit: ESO]
Eris http://apod.nasa.gov/apod/ap060918.html [credit: W. M. Keck Observatory]
Moons of Pluto http://en.wikipedia.org/wiki/K....erberos_(moon)#/medi [credit: NASA, ESA, and M. Showalter (SETI institute)]
New Horizons Approach http://pluto.jhuapl.edu/common..../content/animations/ [credit: JHUAPL]
Moon http://svs.gsfc.nasa.gov/vis/a....000000/a003800/a0038 [credit: NASA/Goddard Space Flight Center Scientific Visualization Studio]
Pluto http://solarsystem.nasa.gov/multimedia/display.cfm?Category=Planets&IM_ID=20073 [credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute]
Sedna’s Orbit http://commons.wikimedia.org/w....iki/File:Sedna-PIA05 [credit: NASA]
Artist’s Conception of Kuiper Belt http://en.wikipedia.org/wiki/F....ile:14-281-KuiperBel [credit: NASA, Wikimedia Commons]
Kuiper Belt World (video) http://planetquest.jpl.nasa.gov/video/41 [credit: NASA Kepler Mission/Dana Berry]
Pluto Discovery Plates http://azmemory.azlibrary.gov/....cdm/singleitem/colle [credit: Clyde Tombaugh, Lowell Observatory]

Today, we're going to take a closer look at how the oceans circulate by following the life of a discarded water bottle as it gets snagged in the North Pacific Garbage Patch. We'll talk about what causes the movement of water, called current, both near the surface and much deeper in the oceans, and we'll show how they follow similar (but not identical) paths to the winds. Ocean circulation plays a huge role in cycling vital nutrients within the seas and helps us transport goods on ships across the globe and it's up to us to protect it.

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Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Aziz, Christine Phelan, Nick, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Eric Koslow, Indika Siriwardena, Khaled El Shalakany, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, William McGraw, Laura Damon, Andrei Krishkevich, Eric Prestemon, Jirat, Brian Thomas Gossett, Ian Dundore, Jason A Saslow, Justin, Jessica Wode, Mark, Caleb Weeks
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