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CrashCourse

CrashCourse

300 episodes

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

Episodes page 2 of 6

  1. Introduction to Astronomy: Crash Course Astronomy #1

    · 17 min

    Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?" Check out the Crash…

  2. Community Ecology: Feel the Love - Crash Course Ecology #4

    · 17 min

    Interactions between species are what define ecological communities, and community ecology studies these interactions anywhere they take place. Although interspecies interactions are mostly competitive, competition is…

  3. The Power of Political Recognition

    · 19 min

    Is recognition really enough? In our final episode of Crash Course Political Theory, we’ll explore this concept, from its 19th-century philosophical origins to modern-day Native land acknowledgements. Crash Course…

  4. Crash Course World History Outtakes Part II

    · 7:28

    In which hilarity ensues on the set of Crash Course World History. Support CrashCourse on Patreon: https://www.patreon.com/crashcourse Learn more about your ad choices. Visit megaphone.fm/adchoices

  5. Visions of the End of the World: Crash Course Religions #22

    · 18 min

    It’s the end of the world as we know it. Or is it? In this episode of Crash Course Religions, we explore end-of-the-world predictions across time and faith traditions. It turns out that, more often than not, those…

  6. Human Population Growth - Crash Course Ecology #3

    · 15 min

    If being alive on Earth were a contest, humans would win it hands down. We're like the Michael Phelps of being alive but with 250,000 times more gold medals. Today, Hank is here to tell us the specifics of why and how…

  7. What is a "Developed" Country? Crash Course Geography #40

    · 18 min

    Today we’re going to discuss what it means for a place to be “developed”. Development is often associated with economic success — that is countries with higher standards of living and material wealth like those found…

  8. How Do Outbreaks Start? Pathogens and Immunology: Crash Course Outbreak Science #2

    · 17 min

    You may not realize it, but your body is like a fortress, designed to defend you from tiny foreign invaders known as pathogens. This seemingly small world is actually super diverse, and sometimes super dangerous too.…

  9. What Does Religious Freedom Mean?: Crash Course Religions #23

    · 18 min

    We might agree religious freedom is a good thing—but can we agree on what it really means? This episode of Crash Course Religions explores ongoing debates over where the limits of religious freedom lie. We’ll discover…

  10. How and Why We Read: Crash Course English Literature #1

    · 10 min

    In which John Green kicks off the Crash Course Literature mini-series with a reasonable set of questions. Why do we read? What's the point of reading critically. John will argue that reading is about effectively…

  11. Religions and Pop Culture: Crash Course Religions #24

    · 17 min

    Is Star Wars a religion? What about belief in UFOs or QAnon? In our final episode of Crash Course Religions, we’ll explore how religion shapes pop culture, and pop culture shapes religion right back. Introduction: Star…

  12. Population Ecology: The Texas Mosquito Mystery - Crash Course Ecology #2

    · 17 min

    Population ecology is the study of groups within a species that interact mostly with each other, and it examines how they live together in one geographic area to understand why these populations are different in one…

  13. Crash Course Sex Ed Preview

    · 6:02

    Welcome to Crash Course Sex Ed! Over the course of 15 episodes, sexologist Shan Boodram will introduce you to the surprising, fascinating, wildly diverse, utterly normal realm of human sexuality. This series will…

  14. What is sex?: Sex Ed #1

    · 14 min

    What even is sex? In this episode of Crash Course Sex Ed, we’ll discover that variation is the name of the game when it comes to sexuality. People differ in how they have sex, why they have sex, and how they define…

  15. Mercury: Crash Course Astronomy #13

    · 15 min

    Mercury is the closest planet to the sun. It has no atmosphere and is, as such, covered in craters. It's also incredibly hot but, surprisingly, has water ice hiding beneath its surface. Check out the Crash Course…

  16. Tissues, Part 1: Crash Course Anatomy and Physiology #2

    · 15 min

    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. Pssst... we made flashcards to help you…

  17. The History of Life on Earth - Crash Course Ecology #1

    · 19 min

    With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence…

  18. The Vulva and Vagina Explained: Sex Ed #2

    · 14 min

    Do you know the difference between the vulva and vagina? In this episode of Crash Course Sex Ed, we shine a spotlight on the Vagina and Co., dispelling a long history of shame and mystery to actually understand our…

  19. Globalization I - The Upside: Crash Course World History #41

    · 17 min

    In which John Green teaches you about globalization, a subject so epic, so, um, global, it requires two videos. In this video, John follows the surprisingly complex path of a t-shirt as it crisscrosses the world before…

  20. The Penis Explained: Sex Ed #3

    · 15 min

    Are penises as big of a deal as we think they are? In this episode of Crash Course Sex Ed, we break down the history, myths, and assumptions we’ve made about penises, from the “right” size to circumcision, and from…

  21. Black Americans in the Civil War: Crash Course Black American History #18

    · 19 min

    The American Civil War is one of the deadliest in US History, and let's just get this out of the way: it was about slavery. In the more than 150 years since the end of the Civil War, there have been many attempts to…

  22. Ecology - Rules for Living on Earth: Crash Course Biology #40

    · 15 min

    Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and…

  23. Crossed Aldol Reactions, Enones, and Conjugate Addition: Crash Course Organic Chemistry #45

    · 18 min

    Insects can communicate with each other about all kinds of things, but instead of using words, they use… you guessed it! Organic Chemistry! Insects can send signals to each other by secreting compounds, and one such…

  24. What is gender identity?: Sex Ed #4

    · 16 min

    What does it mean to transition? In this episode of Crash Course Sex Ed, we’ll uncover the differences between sex and gender, and explore what it looks like when the gender assigned to a person doesn’t match who they…

  25. Decolonization and Nationalism Triumphant: Crash Course World History #40

    · 18 min

    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…

  26. Unpacking Sexual Orientation: Sex Ed #5

    · 14 min

    Why do we like who we like? In this episode of Crash Course Sex Ed, we explore the many facets and variations of sexual orientation, and trace the history of homosexuality to the modern day LGBTQIA+ community.…

  27. Fungi: Death Becomes Them - CrashCourse Biology #39

    · 17 min

    Death is what fungi are all about. By feasting on the deceased remains of almost all organisms on the planet, converting the organic matter back into soil from which new life will spring, they perform perhaps the most…

  28. Sympathetic Nervous System: Crash Course Anatomy and Physiology #14

    · 15 min

    Hank tries not to stress you out too much as he delves into the functions and terminology of your sympathetic nervous system. Pssst... we made flashcards to help you review the content in this episode! Find them on the…

  29. Is virginity real?: Sex Ed #6

    · 14 min

    Is virginity really a thing? In this episode of Crash Course Sex Ed, we’ll bust virginity myths and learn why women have traditionally faced stronger pressure to remain virgins. We’ll explore the ways social scripts…

  30. USA vs USSR Fight! The Cold War: Crash Course World History #39

    · 18 min

    In which John Green teaches you about the Cold War, which was occasionally hot, but on average, it was just cool. In the sense of its temperature. It was by no means cool, man. After World War II, there were basically…

  31. The Deep Future: Crash Course Big History #10

    · 19 min

    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…

  32. Getting real about STIs: Sex Ed #7

    · 14 min

    Where there’s sex, there’s the possibility for STIs. In this episode of Crash Course Sex Ed, we unpack the most common sexually transmitted infections and how to prevent and treat them. Turns out, sexual responsibility…

  33. The Plants and The Bees: Plant Reproduction - CrashCourse Biology #38

    · 15 min

    Hank gets into the dirty details about vascular plant reproduction: they use the basic alternation of generations developed by nonvascular plants 470 million years ago, but they've tricked it out so that it works a…

  34. Crash Course Native American History Preview

    · 5:42

    Welcome to Crash Course Native American History! Over the next 24 episodes, Che Jim will introduce you to the deep, ongoing history of the Indigenous peoples who’ve called these lands home from time immemorial to…

  35. Birth Control Explained: Sex Ed #8

    · 18 min

    There are so many different types of contraception to choose from. So…where do you start? In this episode of Crash Course Sex Ed, we’ll uncover the complicated history of birth control and many of the options available…

  36. Natural Hazards: Crash Course Geography #27

    · 16 min

    Today we wrap up the first half of our series on physical geography by taking a closer look at natural hazards - which are physical processes like heat waves and cyclones, earthquakes and volcanic eruptions, and floods…

  37. Vascular Plants = Winning! - Crash Course Biology #37

    · 17 min

    Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and their secret is also their defining trait: conductive…

  38. Agribusiness, GMOs, and their Role in Development: Crash Course Geography #41

    · 17 min

    On November 26, 2020, trade unions in India reported that over 250 MILLION people took part in a strike. What could prompt such massive protest? Farming. Today, we’re going to take a closer look at GMOs, which are…

  39. Introduction to Native American History: Ep 1 of Crash Course Native American History

    · 18 min

    Native American history didn’t begin in 1492, and it didn’t end in 1900. It stretches back thousands and thousands of years and extends into the present – and the future – of the United States. In our first episode of…

  40. Communists, Nationalists, and China's Revolutions: Crash Course World History #37

    · 17 min

    In which John Green teaches you about China's Revolutions. While the rest of the world was off having a couple of World Wars, China was busily uprooting the dynastic system that had ruled there for millennia. Most…

  41. Pregnancy and Childbirth: Sex Ed #9

    · 14 min

    Most sex ed tells you how not to get pregnant… but what if you want to? In this episode of Crash Course Sex Ed, we’ll traverse the complex journey of getting pregnant, being pregnant, and going through childbirth—with…

  42. The Reproductive Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology #36

    · 14 min

    Hank introduces us to nonvascular plants - liverworts, hornworts & mosses - which have bizarre features, kooky habits, and strange sex lives. Nonvascular plants inherited their reproductive cycle from algae, but have…

  43. Presidential Power: Crash Course Government and Politics #11

    · 9:44

    This week Craig looks at the expressed powers of the President of the United States - that is the ones you can find in the Constitution. From appointing judges and granting pardons, to vetoing laws and acting as the…

  44. Tribal Sovereignty Explained: Ep 2 of Crash Course Native American History

    · 17 min

    What is tribal sovereignty? In this episode of Crash Course Native American History, we’ll explore how tribes can and can’t govern themselves, and why sovereignty isn’t something the U.S. ever gave to tribes — it’s an…

  45. Archdukes, Cynicism, and World War I: Crash Course World History #36

    · 17 min

    In which John Green teaches you about the war that was supposed to end all wars. Instead, it solved nothing and set the stage for the world to be back at war just a couple of decades later. As an added bonus, World War…

  46. Introduction to Anatomy and Physiology: Crash Course Anatomy and Physiology #1

    · 17 min

    In this episode of Crash Course, Hank introduces you to the complex history and terminology of Anatomy & Physiology. Pssst... we made flashcards to help you review the content in this episode! Find them on the free…

  47. Understanding Abortion: Sex Ed #10

    · 13 min

    Abortion is complicated. In this episode of Crash Course Sex Ed, we’ll cover what happens during abortions, why people get them, and what people actually think about the topic. Introduction: Abortion Is Complex 00:00…

  48. Old and Odd: Archaea, Bacteria and Protists - CrashCourse Biology #35

    · 18 min

    Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are…

  49. Why Do We Have Fewer Outbreaks? Epidemiological Transition: Crash Course Outbreak Science #3

    · 17 min

    We take it for granted that society gets better at tackling infectious disease over time, but when you really think about it the progress we’ve made in the last century is pretty amazing. How does that much progress…

  50. What is consent?: Sex Ed #11

    · 14 min

    Consent seems as simple as “yes” or “no” — but is it? In this episode of Crash Course Sex Ed, we’ll explore how affirmative consent reframed the conversation, why context matters, and the importance of checking in with…

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