In which John Green wraps up revolutions month with what is arguably the most revolutionary of modern revolutions, the Industrial Revolution. While very few leaders were beheaded in the course of this one, it changed the lives of more people more dramatically than any of the political revolutions we've discussed. So, why did the Industrial Revolution happen around 1750 in the United Kingdom? Coal. Easily accessible coal, it turns out. All this, plus you'll finally learn the difference between James Watt and Thomas Newcomen, and will never again be caught telling people that your blender has a 900 Newcomen motor.

Chapters:
Introduction: The Industrial Revolution 00:00
What Was the Industrial Revolution? 1:48
Innovations in the British Textile Industry 2:38
Why did the Industrial Revolution start in Europe? 4:08
An Open Letter to the Steam Engine 4:57
What was going on in China during the Industrial Revolution? 5:35
European Advantages: High Wages and Low Fuel Costs 7:03
What was going on in India during the Industrial Revolution? 9:28
Credits 10:29

Learn more about the Industrial Revolution in these Crash Course videos:
The Industrial Revolution: Crash Course European History #24: https://www.youtube.com/watch?v=zjK7PWmRRyg
The Industrial Revolution: Crash Course History of Science #21: https://www.youtube.com/watch?v=FCpqN7GmLYk

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As we wrap up Crash Course Philosophy, we’re using the things we’ve learned to explore big issues like the value of life. Today, we’re discussing abortions in cases of fetal abnormality, assisted suicide, and euthanasia. We will consider the standard of substituted judgment and the values people hold on both sides of these issues—values about the sacredness of life, and the importance of a life of quality, as well as the values of personal liberty and avoiding pain.

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In which John Green teaches you about relations between the early English colonists and the Native people they encountered in the New World. In short, these relations were poor. As soon as they arrived, the English were in conflict with the native people. At Jamestown, Captain John Smith briefly managed to get the colony on pretty solid footing with the local tribes, but it didn't last, and a long series of wars with the natives ensued. This pattern would continue in US history, with settlers pushing into native lands and pushing the inhabitants further west. In this episode, you'll learn about Wahunsunacawh (who the English called Powhatan), his daughter Pocahontas, King Philip's (aka Metacom) War, and the Mystic Massacre. By and large, the history of the Natives and the English was not a happy one, even Thanksgiving wasn't all it's cracked up to be.

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 English tried and failed for a decade to establish a foothold in the New World in Native territory, leading to the lost colony of Roanoke: https://www.commonlit.org/text....s/settling-a-new-wor
When Jamestown was finally established in Virginia in 1607, the local Powhatan tribes sought friendly relations with the settlers, which quickly deteriorated: https://www.commonlit.org/text....s/chief-powhatan-s-a

Chapters:
Introduction 00:00
Native Americans' Relationship to English Settlers 0:28
Trade Between Europeans and Natives 1:36
Pochahontas 2:23
Conflict, Uprisings, and the Failure of the Virginia Company 3:10
The Puritans' Relationship with Native Americans 4:21
The Pequot War 5:45
King Phillip's War 6:35
Mystery Document 8:24
How Native Americans Resisted Colonization 9:49
Credits 10:54

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Today Hank explores artificial intelligence, including weak AI and strong AI, and the various ways that thinkers have tried to define strong AI including the Turing Test, and John Searle’s response to the Turing Test, the Chinese Room. Hank also tries to figure out one of the more personally daunting questions yet: is his brother John a robot?

Curious about AI? Check out this playlist from Crash Course Artificial Intelligence: https://youtube.com/playlist?l....ist=PL8dPuuaLjXtO65L

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All other images and video either public domain or via VideoBlocks, or Wikimedia Commons, licensed under Creative Commons BY 4.0: https://creativecommons.org/licenses/by/4.0/

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Crash Course Philosophy is sponsored by Squarespace.
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So, we've been putting off a kind of basic question here. What is money? What is currency? How are the two different. Well, not to give away too much, but money has a few basic functions. It acts as a store of value, a medium of exchange, and as a unit of account. Money isn't just bills and coins. It can be anything that meets these three criteria. In US prisons, apparently, pouches of Mackerel are currency. Yes, mackerel the fish. Paper and coins work as money because they're backed by the government, which is an advantage over mackerel. So, once you've got money, you need finance. We'll talk about borrowing, lending, interest, and stocks and bonds. Also, this episode features a giant zucchini, which Adriene grew in her garden. So that's cool.

Special thanks to Dave Hunt for permission to use his PiPhone video. this guy really did make an artisanal smartphone! https://www.youtube.com/watch?v=8eaiNsFhtI8
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Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

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Today, Hank answers the question, "Why do we use lotion?" We'll take a look at your integumentary system and all the hard work it does to protect you from and help you interact with the world around you.

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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Chapters:
Introduction: Why Do We Use Lotion? 00:00
Protective & Sensory Functions of the Integumentary System 1:23
More Functions: removing waste, storing blood, and regulating body temperature 2:16
Skin Discoloration: Cyanosis, Jaundice, and Erythema 3:46
Melanin, Vitamin D, and Skin Tone 4:39
How Does Hair Conditioner Work? 5:40
How Do Hair, Skin, and Nails Grow? 6:17
Types of Sweat Glands: Eccrine, Apocrine, Mammary, and Ceruminous 6:55
Sebaceous (Oil) Glands 8:17
Review 9:05
Credits 9:33

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Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.

Table of Contents:
Nitrogen Cycle 1:46
Nitrogen Fixing Bacteria 2:32
Nitrifying Bacteria 3:24
Denitrifying Bacteria 4:34
Phosphorous Cycle 5:16
Lithosphere 5:27
Plants 5:56
Animals 5:56
Decomposers 5:56
Aquatic & Marine Ecosystems 6:24
Sedimentation & Weathering 6:55
Synthetic Fertilizers 7:23

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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 we'll talk about productive and allocative efficiency, skinny jeans, price signals, and more in this information-dense installment of Crash Course.

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:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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Today Hank kicks off our look around MISSION CONTROL: the nervous system.

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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Chapters:
Introduction: Hank's Morning Routine 00:00
Nervous System Functions: Sensory Input, Integration, and Motor Output 1:17
Organization of Central and Peripheral Nervous Systems 2:16
Neurons & Glial Cells 3:42
Central Nervous System Glial Cells: Astrocytes, Microglial, Ependymal, and Oligodendrocytes 4:17
Peripheral Nervous System Glial Cells: Satellite and Schwann 4:56
Cool Neuron Facts! 5:15
Neuron Structure 6:20
Classifying Neuron Structures: Multipolar, Bipolar, and Unipolar 7:00
Classifying Neuron Functionality: Sensory (Afferent), Motor (Efferent), Interneurons (Association) 7:47
Review 9:42
Credits 10:14

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Today we conclude our unit on Philosophy of Religion and Hank gets a little help from Indiana Jones to explain religious pragmatism and Pascal’s Wager, fideism, and Kierkegaard’s leap to faith.

--

“Indiana Jones” © Copyright Walt Disney Studios
All other images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commons BY 4.0: https://creativecommons.org/licenses/by/4.0/

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What is a trade deficit? Well, it all has to do with imports and exports and, well, trade. This week Jacob and Adriene walk you through the basics of imports, exports, and exchange. So, you remember the specialization and trade thing, right? So, that leads to imports and exports. Economically, in the aggregate, this is usually a good thing. Globalization and free trade do tend to increase overall wealth. But not everybody wins.

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:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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e=mc2... it's a big deal, right? But why? And what about this grumpy cat in a box and probability? In this episode of Crash Course Physics, Shini attempts to explain a little more on the topic of quantum mechanics.

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BAHHHHHH! Did I scare you? What exactly happens when we get scared? How does our brain make our body react? Just what are Neurotransmitters? In this episode of Crash Course Psychology, Hank takes us to the simplest part of the complex system of our brains and nervous systems: the neuron.
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Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!
--

Chapters:
Introduction: Brain Chemicals 00:00
Neurons 1:31
Parts of a Neuron 2:07
Synapses 3:08
Neurotransmitters 3:58
Excitatory Neurotransmitters 4:48
Inhibitory Neurotransmitters 5:10
More Neurotransmitters 5:30
Hormones 6:08
Nervous vs. Endocrine Systems 6:44
Endocrine System Glands 7:19
The Pituitary Gland 7:58
How the Nervous & Endocrine Systems Work Together 8:33
Credits 9:33

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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 an embryo and a fetus. He also explains some of the amazing anatomical changes that take place in the mother and the hormonal sequence of events that lead to labor.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!

Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ

Chapters:
Introduction: How Did You Get Here? 00:00
Cleavage Stage: Zygote, Blastomeres, Morula, Blastocyst1:34
Implantation 3:08
The Placenta 4:50
Embryonic Stage 5:07
Female Anatomical Changes During Pregnancy 5:30
Hormonal Sequences Leading to Labor 7:12
Stages of Labor: Dilation, Expulsion, Placental Delivery 8:35
Review 9:34

***

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:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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In the penultimate episode of Crash Course Anatomy & Physiology, Hank explains your adaptive immune system. The adaptive immune system's humoral response guards extracellular terrain against pathogens. Hank also explains B cells, antibodies, and how vaccines work.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!

Download it here for Apple Devices: https://apple.co/3d4eyZo
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Chapters:
Introduction: Adaptive Immune Responses 00:00
How B Cells Identify Antigens 2:14
B Cells Become Effector Cells & Memory Cells 4:05
How Antibodies Fight Antigens 5:22
Active and Passive Humoral Immunity 6:03
How Vaccines Work 6:27
Review 8:30

***

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:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

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Over the millennia, every region on Earth has developed its own successful agricultural ecosystem from flat fields of grain and mountainside rice terraces to coastal fish farms and goat herding. Today, we’re going to break down agricultural systems into three scales: subsistence, small-scale, and industrial agriculture. And we’ll take a look at how a place's history plays a huge role in the system we see today as we follow the story of agriculture in the Philippines.

SOURCES

Philippines
Davila, F. (2018). Human Ecology and Food Systems: Insights from the Philippines. Human Ecology Review, 24(1), 23–50. https://www.jstor.org/stable/26506660
Theresa Ventura. (2016). From Small Farms to Progressive Plantations: The Trajectory of Land Reform in the American Colonial Philippines, 1900–1916. Agricultural History, 90(4), 459–483. https://www.jstor.org/stable/1....0.3098/ah.2016.090.4
The development and agriculture paradigms transformed: Reflections from the small-scale organic rice fields of the Philippines Robin Broad &

John Cavanagh https://www.tandfonline.com/do....i/full/10.1080/03066  

Colonial history
https://en.wikipedia.org/wiki/....History_of_the_Phili
asianstudies.org/publications/eaa/archives/the-philippines-an-overview-of-the-colonial-era/

Agribusiness
http://asianfarmers.org/afares....earches0876dlsj/2009
https://ifranchise.ph/multinational-companies/

Age of Farmers
https://philjournalsci.dost.go....v.ph/images/pdf/pjs_
https://cebudailynews.inquirer.....net/191635/declinin

Land Tenure
https://cadasta.org/resources/....white-papers/strengt
https://www.aljazeera.com/news..../2008/3/28/asian-ric
https://www.aljazeera.com/econ....omy/2019/12/30/growi

Climate Change
https://theconversation.com/in....-philippines-climate
https://www.bbc.com/future/bes....poke/follow-the-food
https://www.bbc.com/news/scien....ce-environment-45828
https://www.irri.org/climate-change-ready-rice

Agroecology
Altieri, M.A., Funes-Monzote, F.R. & Petersen, P. Agroecologically efficient agricultural systems for smallholder farmers: contributions to food sovereignty. Agron. Sustain. Dev. 32, 1–13 (2012). https://doi.org/10.1007/s13593-011-0065-6 https://link.springer.com/arti....cle/10.1007%2Fs13593
http://safsc.org.za/wp-content..../uploads/2015/09/Agr
Agroecology – writ large; https://link.springer.com/chap....ter/10.1007/978-94-0
Eric Holt-Giménez & Miguel A. Altieri (2013) Agroecology, Food Sovereignty, and the New Green Revolution, Agroecology and Sustainable Food Systems, 37:1, 90-102, DOI: 10.1080/10440046.2012.716388
http://safsc.org.za/wp-content..../uploads/2015/09/Agr

Water Footprint
https://foodprint.org/issues/t....he-water-footprint-o
https://www.fao.org/3/ap527e/ap527e.pdf

Watch our videos and review your learning with the Crash Course App!
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Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, Shannon McCone, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Erin Switzer, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Vincent, Michael Wang, Stacey Gillespie (Stacey J), Jaime Willis, Alexis B, Burt Humburg, Aziz Y, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Rachel Creager, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, 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, William McGraw, ThatAmericanClare, 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 Hank begins to teach you about Philosophy by discussing the historical origins of philosophy in ancient Greece, and its three main divisions: metaphysics, epistemology, and value theory. He will also introduce logic, and how you’re going to use it to understand and critically evaluate a whole host of different worldviews throughout this course. And also, hopefully, the rest of your life.

--

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Why do people sometimes do bad things just because someone else told them to? And what does the term Groupthink mean? In today's episode of Crash Course Psychology, Hank talks about the ideas of Social Influence and how it can affect our decisions to act or to not act.

Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!
--
Chapters:
Introduction 00:00
Milgram's Obedience Experiment 0:31
Social Influence & Conformity 3:22
Asch's Conformity Experiment 4:08
Cultural Expectations & Normative Social Influence 5:21
Social Facilitation 5:59
Social Loafing 6:19
Deindividuation & Group Polarization 6:51
Groupthink 7:58
Review & Credits 9:06

--
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We begin our unit on ethics with a look at metaethics. Hank explains three forms of moral realism – moral absolutism, and cultural relativism, including the difference between descriptive and normative cultural relativism – and moral subjectivism, which is a form of moral antirealism. Finally, we’ll introduce the concept of an ethical theory.

--

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Today Hank gains insight from that most philosophical of figures...Leonardo DiCaprio. In this episode, we’re talking about the process of philosophical discovery and questioning the relationship between appearance and reality by taking a look at Plato’s famous Myth of the Cave. All with a little help from our good pal Leo.

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Images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commons by 4.0: https://creativecommons.org/licenses/by/4.0/

"Inception" stills copyright 2010 Warner Bros. Entertainment Inc. and Legendary Pictures

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In this episode of Crash Course, Hank introduces you to the complex history and terminology of Anatomy & Physiology.

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Chapters:
Introduction 00:00
History of Anatomy 2:34
Physiology: How Parts Function 3:48
Complementarity of Structure & Function 4:09
Hierarchy of Organization 4:20
Directional Terms 7:27
Review 10:24
Credits 10:59

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Today Hank begins to teach you about Philosophy by discussing the historical origins of philosophy in ancient Greece, and its three main divisions: metaphysics, epistemology, and value theory. He will also introduce logic, and how you’re going to use it to understand and critically evaluate a whole host of different worldviews throughout this course. And also, hopefully, the rest of your life.

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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.

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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Chapters:
Introduction: Broca's Aphasia 00:00
Central Nervous System Structure & Function 1:48
Brain Development: Neural Tube 3:27
Brain Development: 3 Primary Vesicles 3:47
Brain Development: 5 Secondary Vesicles 4:04
Brain Development: Major Adult Brain Regions 4:18
Brain Development: Cerebellum & Brain Stem 4:42
Brain Development: Reptilian Brain 5:45
Brain Development: Cerebral Hemispheres 6:35
The Brain's Lobes 7:35
Review 9:14
Credits 9:48

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Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever:

Creatrix Tiara
Dr. Sarah Hinzman
Caroline Haas
Mason R Norris
Alton Toth of Sechelt
Rodrigo Groppa
Sönke
Rebecca Karger
Gregle
Ariana Flewelling (@EdTechAri)

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 groups and their role in the U.S. political system. Special interest groups are groups of individuals that make policy-related appeals to government - like the NRA, AARP, or the U.S. Chamber of Commerce. It's all pretty controversial, as money plays an important role in the policies and people these groups influence, so we'll bring in the clones to argue for and against them.

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So today, Craig is going to try to get inside the heads of voters by discussing how voters make decisions. Now obviously, like all decision making, voter decisions are influenced by a multitude of factors, but the three we are going to focus on today (and the three political scientists seem to think play the biggest role) are party loyalty, the issues involved in an election, and candidate characteristics. Now this all might seem like common sense, and well it sort of is, but it's important to be aware of and take into account the factors that influence our decisions - especially when considering that many voters are not particularly well-informed.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Support is provided by Voqal: http://www.voqal.org

All attributed images are licensed under Creative Commons by Attribution 4.0
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