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CrashCourse

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.

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  • Yesterday · 15 min

    Social Thinking: Crash Course Psychology #37

    Why do people do bad things? Is it because of the situation or who they are at their core? In this week's episode of Crash Course Psychology, Hank works to shed a little light on the ideas of Situation vs. Personality. Oh, and we'll have a look at the Stanford Prison Experiment... It's alarming. If you are currently in need of help: http://www.mentalhealth.gov/get-help/ Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych! -- Chapters: Introduction: Social Psychology 00:00 Attribution Theory 01:29 Fundamental Attribution Error 2:22 Dual-Process Theory of Persuasion 3:18 "Foot-in-the-door" Phenomenon 4:14 Stanford Prison Experiment 5:13 Cognitive Dissonance Theory 8:08 Review & Credits 9:46 -- Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 17 min

    How to Prepare for College | How to College | Crash Course

    You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1 In this episode of Crash Course: How to College, Erica talks us through what preparing for college could entail and how we can be active in that preparation. Applying to college is exciting and stressful and lots of other things that cause a whole lot of emotions. But you can take steps now that will make the college admissions process a lot easier once you get to that point. *** Now you can take top-tier college courses with Study Hall! Study Hall videos are available to watch at no cost, and first-year courses are $25 to sign-up and begin coursework. Once you're satisfied with your grade, receive credit for only $400. Sign up at https://link.gostudyhall.com/my1 Follow Study Hall on socials! Twitter: https://twitter.com/gostudyhall Instagram: https://Instagram.com/GoStudyHall Facebook: https://www.facebook.com/GoStudyHall _______________________________________________ Chapters: 0:00 - Introduction 0:51 - Getting organized 1:24 - Goals 2:25 - Courses 3:36 - Standardized tests 6:12 - Figuring out your interests _______________________________________________ Links to the resources listed in this video: GED: https://ged.com/ Kaplan: https://www.kaptest.com/study/ Career assessment tests: https://www.careeronestop.org/ https://www.mynextmove.org/explore/ip National College Attainment Network: https://www.ncan.org/general/custom.asp?page=MemberDirectory Upward Bound: https://www2.ed.gov/programs/trioupbound/index.html Crash Course: How to College is part of Study Hall, a partnership between ASU and Crash Course. Head over to our new Study Hall channel to check out our Fast Guide series which break down different college majors. *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, 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), 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, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids" #CrashCourse #HowtoCollege #StudyHall Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    Aldehyde and Ketone Reactions - Hydrates, Acetals, and Imines: Crash Course Organic Chemistry #29

    We’ve already learned the basics of carbonyl chemistry and talked about how we can synthesize aldehydes and ketones, but there’s still so much more to learn, like the role carbonyl groups play in reactions involving sedatives! In this episode of Crash Course Organic Chemistry we’re diving deeper into aldehydes and ketones by focusing on addition reactions of oxygen and nitrogen based nucleophiles. We’ll cover hydrates, acetals and hemiacetals, imines and enamines, and more! Episode Sources: io9. 2020. This Is The Drug In The Rolling Stones' Song "Mother's Little Helper". [online] Available at: https://io9.gizmodo.com/this-is-the-drug-in-the-rolling-stones-song-mothers-li-1693032181 Bionity.com. 2020. Mickey_Finn_(Drugs). [online] Available at: https://www.bionity.com/en/encyclopedia/Mickey_Finn_%28drugs%29.html#The_Chicago_bartender_Michael_.22Mickey.22_Finn Chm.bris.ac.uk. 2020. Ninhydrin - Molecule Of The Month - April 2018. [online] Available at: http://www.chm.bris.ac.uk/motm/ninhydrin/ninhydrinh.htm Ewan, H.S., Iyer, K., Hyun, S.H., Wleklinski, M., Cooks, R.G. and Thompson, D.H., 2017. Multistep flow synthesis of diazepam guided by droplet-accelerated reaction screening with mechanistic insights from rapid mass spectrometry analysis. Organic Process Research & Development, 21(10), pp.1566-1570. Series Sources: Brown, W. H., Iverson, B. L., Ansyln, E. V., Foote, C., Organic Chemistry; 8th ed.; Cengage Learning, Boston, 2018. Bruice, P. Y., Organic Chemistry, 7th ed.; Pearson Education, Inc., United States, 2014. Clayden, J., Greeves, N., Warren., S., Organic Chemistry, 2nd ed.; Oxford University Press, New York, 2012. Jones Jr., M.; Fleming, S. A., Organic Chemistry, 5th ed.; W. W. Norton & Company, New York, 2014. Klein., D., Organic Chemistry; 1st ed.; John Wiley & Sons, United States, 2012. Louden M., Organic Chemistry; 5th ed.; Roberts and Company Publishers, Colorado, 2009. McMurry, J., Organic Chemistry, 9th ed.; Cengage Learning, Boston, 2016. Smith, J. G., Organic chemistry; 6th ed.; McGraw-Hill Education, New York, 2020. Wade., L. G., Organic Chemistry; 8th ed.; Pearson Education, Inc., United States, 2013. *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Vincent, Emilee Murphy, Michael Wang, Jordan willis, Krystle Young, Michael Dowling, Alexis B, Rene Duedam, Burt Humburg, Aziz, Nick, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Rachel Creager, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Divonne Holmes à Court, Eric Koslow, Indika Siriwardena, Khaled El Shalakany, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, William McGraw, Andrei Krishkevich, Sam Ferguson, Eric Prestemon, Jirat, TheDaemonCatJr, Wai Jack Sin, Ian Dundore, Jason A Saslow, Justin, Jessica Wode, Mark, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 17 min

    The Railroad Journey and the Industrial Revolution: Crash Course World History 214

    In which John Green teaches you about railroads and some of the ways they changed the world, and how they were a sort of microcosm for the Industrial Revolution as a whole. Prior to the invention of steam-powered railroads, pretty much all locomotion had been muscle-powered. You either walked where you wanted to go or rode on an animal to get where you were going. The railroad changed human perception of time and space, making long-distance travel much faster and easier. Railroads also changed habits, including increasing reading. People needed some sort of distraction to ensure they didn't have to talk to other people on the train. Like any new technology, railroads also scared people. All kinds of fears surrounded rail travel, but over time, people got over them. And the quality of boiler manufacturing improved, so the trains exploded less often, which also made people feel safer. Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 16 min

    More EAS - Electron Donating and Withdrawing Groups: Crash Course Organic Chemistry #38

    In the previous episode we discussed what happens when we use electrophilic aromatic substitution to add a group to a benzene ring, but what happens when you try to add even more groups? Well, things get a little more complicated. In this episode of Crash Course Organic Chemistry, we’ll continue our exploration of EAS reactions by looking at electron donating groups and electron withdrawing groups on benzene, and how they affect what happens when we try to add new groups to the ring. Episode Sources: Hammond, G.S. and Douglas, K.J., 1959. Aromatic nitration. III. The ortho to para ratio in nitration of benzonitrile. Journal of the American Chemical Society, 81(5), pp.1184-1187. Series Sources: Brown, W. H., Iverson, B. L., Ansyln, E. V., Foote, C., Organic Chemistry; 8th ed.; Cengage Learning, Boston, 2018. Bruice, P. Y., Organic Chemistry, 7th ed.; Pearson Education, Inc., United States, 2014. Clayden, J., Greeves, N., Warren., S., Organic Chemistry, 2nd ed.; Oxford University Press, New York, 2012. Jones Jr., M.; Fleming, S. A., Organic Chemistry, 5th ed.; W. W. Norton & Company, New York, 2014. Klein., D., Organic Chemistry; 1st ed.; John Wiley & Sons, United States, 2012. Louden M., Organic Chemistry; 5th ed.; Roberts and Company Publishers, Colorado, 2009. McMurry, J., Organic Chemistry, 9th ed.; Cengage Learning, Boston, 2016. Smith, J. G., Organic chemistry; 6th ed.; McGraw-Hill Education, New York, 2020. Wade., L. G., Organic Chemistry; 8th ed.; Pearson Education, Inc., United States, 2013. *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Shannon McCone, Amelia Ryczek, Ken Davidian, Brian Zachariah, Stephen Akuffo, Toni Miles, Oscar Pinto-Reyes, Erin Nicole, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel A Stevens, Vincent, Michael Wang, Stacey Gillespie, Jaime Willis, Krystle Young, Michael Dowling, Alexis B, Rene Duedam, Burt Humburg, Aziz, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Rachel Creager, Jennifer Smith, 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, William McGraw, Andrei Krishkevich, ThatAmericanClare, Rizwan Kassim, Sam Ferguson, Alex Hackman, Jirat, Katie Dean, neil matatall, TheDaemonCatJr, Wai Jack Sin, Ian Dundore, Matthew, Justin, Jessica Wode, Mark, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 19 min

    Biological Polymers: Crash Course Organic Chemistry #49

    You might think a self regulating factory sounds pretty unbelievable, but that’s pretty much exactly how our bodies work! Our bodies are full of regulatory mechanisms that keep all the organic molecules we need to live in balance. In this episode of Crash Course Organic Chemistry, we’ll look at the building blocks that form these biological polymers, including carbohydrates, proteins, and DNA! Episode Sources: Garrett, R. H., & Grisham, C. M. (2016). Biochemistry. Cengage Learning. Appling, Dean R., Anthony-Cahill, Spencer J., Mathews, Christopher K.. (2016). Biochemistry: concepts and connections. Essex: Pearson. PDB IDs (available at https://www.rcsb.org/): • 1BNA, 6TNA, 3MQ7, 7BJK, 6EC0, 2D3H, 1UBQ, 1BBB, 3FGU Series Sources: Brown, W. H., Iverson, B. L., Ansyln, E. V., Foote, C., Organic Chemistry; 8th ed.; Cengage Learning, Boston, 2018. Bruice, P. Y., Organic Chemistry, 7th ed.; Pearson Education, Inc., United States, 2014. Clayden, J., Greeves, N., Warren., S., Organic Chemistry, 2nd ed.; Oxford University Press, New York, 2012. Jones Jr., M.; Fleming, S. A., Organic Chemistry, 5th ed.; W. W. Norton & Company, New York, 2014. Klein., D., Organic Chemistry; 1st ed.; John Wiley & Sons, United States, 2012. Louden M., Organic Chemistry; 5th ed.; Roberts and Company Publishers, Colorado, 2009. McMurry, J., Organic Chemistry, 9th ed.; Cengage Learning, Boston, 2016. Smith, J. G., Organic chemistry; 6th ed.; McGraw-Hill Education, New York, 2020. Wade., L. G., Organic Chemistry; 8th ed.; Pearson Education, Inc., United States, 2013. *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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 __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 21 min

    The Evolutionary Epic: Crash Course Big History #5

    In which John Green, Hank Green, and Emily Graslie teach you about evolution. So, in the last 3.8 billion years, life on Earth has evolved from single-celled prokaryotes to the dizzying array of life we have today. So how did all this happen? We'll talk about Darwin, evolution, natural selection, and how we got from there to here, and from then to now. Learn more here: http://www.bighistoryproject.com Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    Martin Luther King, Jr: Crash Course Black American History #36

    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! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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 __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 16 min

    Biomedical Treatments: Crash Course Psychology #36

    Do you know how Prozac works? Or lithium? Did you know that electroshock therapy is still a thing? There's a lot to know about biomedical treatments and how they work in tandem with psychotherapy or talk therapy. In this episode of Crash Course Psychology, Hank talks about how Biomedical Treatments have evolved and how they work with other therapies. If you are currently in need of help: http://www.mentalhealth.gov/get-help/ Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych! -- Chapters: Introduction: Does Psychotherapy Work? 00:00 Client & Clinician Perceptions 01:19 Treatment Outcome Research 2:19 Effectiveness vs. Efficacy 3:10 Which Therapies Work Best? 3:45 Biomedical Therapies 4:42 Classes of Psychotropic Drugs 5:09 "Electro-Shock" or Electroconvulsive Therapy (ECT) 7:38 Other Biomedical Therapies: rTMS & DBS 8:50 Lifestyle Changes 9:25 Review & Credits 10:09 -- Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    IP Problems, YouTube, and the Future: Crash Course Intellectual Property #7

    In which Stan Muller talks about some of the problems in Intellectual Property law as it exists today. He'll also teach you a little about how IP law applies to everyone's favorite media platform, YouTube. Lastly, he'll do a little prognosticating, and try to predict how IP law might change in the future. Destin's Freebooting Video: https://www.youtube.com/watch?v=L6A1Lt0kvMA Crash Course is now 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: Joseph G. O'Connor III, Damian Shaw, Kenzo Yasuda, Brendan M. Sullivan, Nick Glorioso, Stephen DeCubellis, Vanessa Benavent, SHS Physics, Scott Nedrow, Matthew Palka (Errrbody Palka!) :D TO: Everyone FROM: Me You CAN'T be 'Based off' of anything! BASED ON! FROM: denial Nou Ani Anquietas. Hic Qua Videum. Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    Geographies of the Future: Crash Course Geography #50

    In our final episode of Crash Course Geography we're going to take a look towards the future, and to do that we'll need to revisit our fundamental geography tools: space, place, and human-environment interactions! We'll talk about the rise of the digital world and virtual spaces, the continued impacts of globalization and the Anthropocene, and even ponder new ideas like geoengineering. As we've said many times in this series the Earth is a beautifully dynamic place, and human innovation and our desire to claim and create our own places will continue to build new landscapes and futures. Thank you all so much for joining us on this journey across our extraordinary home planet! 0:00 - space-time 1:10 - intro 1:17 - virtual spaces 3:15 - place and globalization 4:48 - the slow city movement 5:57 - data landscapes and surveillance 8:51 - human footprint 9:38 - geoengineering 11:10 - series wrap-up 12:26 - outro Sources: https://docs.google.com/document/d/1-x4TxhStow9S-1Oo8vHHstuALghiu9S4R6wcbuTtGQQ/edit?usp=sharing Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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 __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    Asian Responses to Imperialism: Crash Course World History #213

    In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism; specifically, writers from countries that were colonized by European powers. We'll look at the writings of Sayyid Jamal ad-Din al-Afghani from the Middle East, Liang Qichao from China, and Rabindranath Tagore from India. these voices from the countries that were colonized give us a sense of how conquered people saw their conquerors, and give an insight into what these nations learned from being dominated by Europe. It's pretty interesting, OK? A lot of this episode is drawn from a fascinating book by Pankaj Mishra called The Ruins of Empire: The Revolt Against the West and the Remaking of Asia. You should read it. Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    Nonviolence and Peace Movements: Crash Course World History 228

    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 to violence when they come into conflict. In the 20th century, it became much more common for people to enact change by means of nonviolence, and there was a common thread of connection between many of the most notable advocates of peaceful change. Crash Course will take you from Gandhi to Gregg to Bayard Rustin to Martin Luther King, Jr, to the Cold War to Arab Spring along a path of nonviolent resistance and peaceful change. It's pretty great. Citation 1: King, Martin Luther, Jr., Farewell Statement for All India Radio, 9 March 1959. Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 19 min

    Medicinal Chemistry and Penicillin Total Synthesis: Crash Course Organic Chemistry #50

    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 we have medicines to treat them, like proton pump inhibitors! In this final episode of Crash Course Organic Chemistry, we'll look at medicinal chemistry by breaking down how penicillin fights bacteria, how proteins are made both in the body and in the lab, and we'll finally finish our synthesis of penicillin V and complete our Mold Medicine Map! Hopefully this series has shown you the many ways organic chemistry is all around us and how it can help us to better understand ourselves, and improve our world! Episode Sources: Patrick, G. L. (2013). An introduction to medicinal chemistry. Oxford university press. Vollmer, W., Blanot, D., & De Pedro, M. A. (2008). Peptidoglycan structure and architecture. FEMS microbiology reviews, 32(2), 149-167. Sauvage, E., Duez, C., Herman, R., Kerff, F., Petrella, S., Anderson, J. W., ... & Charlier, P. (2007). Crystal structure of the Bacillus subtilis penicillin-binding protein 4a, and its complex with a peptidoglycan mimetic peptide. Journal of molecular biology, 371(2), 528-539. PDB IDs (available at https://www.rcsb.org/): • 5CXW • 6TNA ( modified to show a bound amino acid) Series Penicillin References: Nicolaou, K. C., & Sorensen, E. J. (1996). Classics in total synthesis: targets, strategies, methods. John Wiley & Sons. Sheehan, J. C. (1982). The enchanted ring: the untold story of penicillin. Primary literature for Sheehan’s penicillin synthesis: Sheehan, J.C. & Izzo, P.T. J. Am. Chem. Soc. 1948, 70, 1985; Sheehan, J.C. & Izzo, P.T. J. Am. Chem. Soc. 1949, 71, 4059; Sheehan, J.C. & Bose A.K. J. Am. Chem. Soc. 1950, 72, 5158; Sheehan, J.C., Buhle, E.L, Corey E.J., Laubach, G.D. & Ryan J.J. J. Am. Chem. Soc. 1950, 72, 3828; Sheehan, J.C. & Laubach, G.D. J. Am. Chem. Soc. 1951, 73, 4376; Sheehan, J.C. & Hoff, D.R. J. Am. Chem. Soc. 1957, 79, 237; Sheehan, J.C. & Corey E.J. J. Am. Chem. Soc. 1951, 73, 4756 Series Sources: Brown, W. H., Iverson, B. L., Ansyln, E. V., Foote, C., Organic Chemistry; 8th ed.; Cengage Learning, Boston, 2018. Bruice, P. Y., Organic Chemistry, 7th ed.; Pearson Education, Inc., United States, 2014. Clayden, J., Greeves, N., Warren., S., Organic Chemistry, 2nd ed.; Oxford University Press, New York, 2012. Jones Jr., M.; Fleming, S. A., Organic Chemistry, 5th ed.; W. W. Norton & Company, New York, 2014. Klein., D., Organic Chemistry; 1st ed.; John Wiley & Sons, United States, 2012. Louden M., Organic Chemistry; 5th ed.; Roberts and Company Publishers, Colorado, 2009. McMurry, J., Organic Chemistry, 9th ed.; Cengage Learning, Boston, 2016. Smith, J. G., Organic chemistry; 6th ed.; McGraw-Hill Education, New York, 2020. Wade., L. G., Organic Chemistry; 8th ed.; Pearson Education, Inc., United States, 2013. *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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, Er Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 16 min

    Getting Help - Psychotherapy: Crash Course Psychology #35

    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 this episode of Crash Course Psychology, Hank talks about what "Getting Help" can look like. If you are currently in need of help: http://www.mentalhealth.gov/get-help/ Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych! -- Chapters: Introduction: Types of Psychotherapy 00:00 Psychodynamic Therapy 1:13 Existential-Humanist Therapy 03:46 Behavioral Therapy 6:00 Cognitive Therapy 8:02 Integrative Therapies 9:35 Group and Family Therapy 09:48 Review & Credits 10:31 -- Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 18 min

    Reproduction: Crash Course Zoology #9

    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 definition of what it means to be an animal and as you'll see life has found a variety of methods to pass down genetic information. We'll also discuss the differences between sex and gender, take a closer look at sex determination systems, examine how same-sex behavior happens all across the animal kingdom, and live a day-in-the-life of the serially hermaphroditic clownfish! 🦔🐒🐝🐛🐘🐍🐀🐠 🐢🐋🐅🦓🦇🦜🐜🪱🦑 🦀🐊 Learn more about Rae here! https://www.raewynngrant.com​​ *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Vincent, Emilee Murphy, Michael Wang, Jordan willis, Krystle Young, Michael Dowling, Alexis B, Rene Duedam, Burt Humburg, Aziz, Nick, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Rachel Creager, Jennifer Smith, Matt Curls, Tim Kwist, Jonathan Zbikowski, Jennifer Killen, Sarah & Nathan Catchings, Brandon Westmoreland, team dorsey, Trevin Beattie, Divonne Holmes à Court, Eric Koslow, Indika Siriwardena, Khaled El Shalakany, Shawn Arnold, Siobhán, Ken Penttinen, Nathan Taylor, William McGraw, Andrei Krishkevich, Sam Ferguson, Eric Prestemon, Jirat, TheDaemonCatJr, Wai Jack Sin, Ian Dundore, Jason A Saslow, Justin, Jessica Wode, Mark, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 12 min

    How to Apply to College | How to College | Crash Course

    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 get a little overwhelming. But, not to worry, Erica has some helpful ways to manage everything you need to keep track of, fill out, and even ways to save some money in fees. *** Now you can take top-tier college courses with Study Hall! Study Hall videos are available to watch at no cost, and first-year courses are $25 to sign-up and begin coursework. Once you're satisfied with your grade, receive credit for only $400. Sign up at https://link.gostudyhall.com/my1 Follow Study Hall on socials! Twitter: https://twitter.com/gostudyhall Instagram: https://Instagram.com/GoStudyHall Facebook: https://www.facebook.com/GoStudyHall _______________________________________________ Chapters: 0:00 - Introduction 0:49 - List of schools 3:30 - Documents to assemble 4:12 - Writing samples 7:11 - Conclusion _______________________________________________ Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, 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), 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, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids" #CrashCourse #HowtoCollege #StudyHall *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Dave Freeman, Hasan Jamal, DL Singfield, Lisa Owen, Jeremy Mysliwiec, 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), 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, Alex Hackman, Jirat, Katie Dean, Avi Yashc Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 17 min

    The Rise of the West and Historical Methodology: Crash Course World History #212

    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 you what the West is. And then he has to explain the Rise of the West. And then he gets down to talking about the different ways that historians and other academics have explained how the West became dominant in the world. He'll look at explanations from Acemoglu and Robinson's "Why Nations Fail," Francis Fukuyama's "The Origins of Political Order," and Ian Morris's "Why the West Rules, for Now." Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 1 hr 4 min

    Crash Course Office Hours: Anatomy and Physiology

    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 submitted and talk about the best ways to study anatomy & physiology. Thank you to Flipgrid for sponsoring this series. Check them out here: https://info.flipgrid.com/ 00:00 Introduction 02:30 Is the heart a muscle or an organ? 08:09 How are skin cells organized through the layers of the skin? 15:01 Neurotransmitters, action potential, gated channels, and the process of muscle contraction 26:55 What's the best way to remember bone landmarks? 30:16 How to read an ECG 40:20 Tips for studying A&P #1 - learning the root words 43:54 Tips for studying A&P #2 - how to use flashcards 47:18 Tips for studying A&P #3 - learning by teaching 49:08 What happens when a muscle cramps? 51:58 Tricks for remembering the veins and arteries 55:25 Outro Crash Course Study Skills: https://www.youtube.com/watch?v=IhuwS5ZLwKY&list=PL8dPuuaLjXtNcAJRf3bE1IJU6nMfHj86W Image sources: https://openstax.org/details/books/anatomy-and-physiology *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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 __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids #crashcourse #officehours #anatomy #physiology Learn more about your ad choices. Visit megaphone.fm/adchoices

  • Yesterday · 15 min

    The Black Women's Club Movement: Crash Course Black American History #23

    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 organized to make sure civil and political rights were extended to ALL Black people, not just Black men. These clubs were grass-roots organizations of middle-class women who were often only one generation removed from slavery. Today we'll learn about the origins of these clubs and some of the notable women who drove this movement. Clint's book, How the Word is Passed is available now! https://bookshop.org/a/3859/9780316492935 SOURCES: https://www.britannica.com/biography/Josephine-St-Pierre-Ruffin https://www.nps.gov/people/josephine-st-pierre-ruffin.htm#_ftn4 Paula Giddings, Where and When I Enter: The Impact of Black Women on Race and Sex in America (New York: Harper Collins Publishers, Inc., 1984). Deborah Gray White, Too Heavy a Load: Black Women in Defense of Themselves, 1894-1994 (New York: W. W. Norton & Company, Inc., 1999). Roger Streitmatter, Raising Her Voice African-American Women Journalists Who Changed History University Press of Kentucky 2014 Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: https://apple.co/3d4eyZo Download here for Android Devices: https://bit.ly/2SrDulJ 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: Shannon McCone, Amelia Ryczek, Ken Davidian, Brian Zachariah, Stephen Akuffo, Toni Miles, Oscar Pinto-Reyes, Erin Nicole, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel A Stevens, Vincent, Michael Wang, Stacey Gillespie, Jaime Willis, Krystle Young, Michael Dowling, Alexis B, Rene Duedam, Burt Humburg, Aziz, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, Rachel Creager, Jennifer Smith, 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, William McGraw, Andrei Krishkevich, ThatAmericanClare, Rizwan Kassim, Sam Ferguson, Alex Hackman, Jirat, Katie Dean, neil matatall, TheDaemonCatJr, Wai Jack Sin, Ian Dundore, Matthew, Justin, Jessica Wode, Mark, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids #crashcourse #history #blackhistory Learn more about your ad choices. Visit megaphone.fm/adchoices

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