CrashCourse

In this episode of Crash Course Psychology, Hank has trouble saying the words and posits a world in which he can be hypnotized to forget things just so he can enjoy them all over again.

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Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. We’ve visited comets up close and found them to be lumpy, with vents on the surface that release the gas as ice sublimates. Eons ago, comets (and asteroids) may have brought a lot of water to Earth -- as well as the ingredients for life.

Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster

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Chapters:
Introduction: Comets 00:00
Comets = Dirty Snowballs 1:19
Comets Have Two Tails 2:52
Short-Term vs Long-Term Comets 4:35
Where do comets come from? 5:06
Comets Up-Close 6:17
What Happens When Comets Hit Earth? 9:15
Review 10:59
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PBS Digital Studios: http://youtube.com/pbsdigitalstudios

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

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PHOTOS/VIDEOS
Halley's Comet, 1910 http://en.wikipedia.org/wiki/File:Halley%27s_Comet,_1910.JPG [credit: New York Times, Wikimedia Commons]
Bayeux Tapestry http://upload.wikimedia.org/wikipedia/commons/f/fa/Bayeux_Tapestry_32-33_comet_Halley_Harold.jpg [credit: Wikimedia Commons]
Comet McNaught [credit: Phil Plait]
Comet McNaught + tail http://en.wikipedia.org/wiki/C/2006_P1#/media/File:Cometmcnaughtchrisn1.jpg [credit: Chris North, Wikimedia Commons]
Comet surface http://rosetta.jpl.nasa.gov/sites/default/files/PIA18867-MAIN_Nov9-15765234852_c16c4097a5_o.jpg [credit: ESA/Rosetta/NAVCAM]
Fine structure in the comet’s jets http://blogs.esa.int/rosetta/2015/01/16/fine-structure-in-the-comets-jets/ [credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA]
Comet Halley http://apod.nasa.gov/apod/image/1001/halley_giotto_big.jpg [credit: Halley Multicolor Camera Team, Giotto Project, ESA]
Comet McNaught https://solarsystem.nasa.gov/multimedia/display.cfm?Category=Planets&IM_ID=10194 [credit: ESO]
Hubble's Last Look at Comet ISON Before Perihelion http://en.wikipedia.org/wiki/File:Hubble%27s_Last_Look_at_Comet_ISON_Before_Perihelion.jpg
[credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)]
Hale-Bopp: The Great Comet of 1997 http://apod.nasa.gov/apod/ap131013.html [credit: Jerry Lodriguss, used with permission]
Sungrazer video http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11307 [credit: NASA's Goddard Space Flight Center]
“Large Web” graphic http://www.nasa.gov/sites/default/files/hs-2014-29-a-large_web.jpg [credit: JHUAPL/SwRI/Dan Durda]
Comet Daniel http://commons.wikimedia.org/wiki/File:Comet_Daniel_-_1907.jpg [credit: Max Wolf, Wikimedia Commons]
Vega 1 Low Res http://nssdc.gsfc.nasa.gov/planetary/image/veg2_tikf0002.gif [credit: Russian Academy of Sciences]
The Nucleus of Comet Halley http://sci.esa.int/giotto/51183-the-nucleus-of-comet-halley/ [credit: ESA/MPS]
Comet Hartley 2 http://en.wikipedia.org/wiki/103P/Hartley#/media/File:495296main_epoxi-1-full_full.jpg [credit: NASA/JPL-Caltech/UMD]
Comet 67P/Churyumov-Gerasimenko http://sci.esa.int/rosetta/54472-comet-67p-on-3-august-2014/ [credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA]
OSIRIS Catches Activity in the Act http://blogs.esa.int/rosetta/2015/04/20/osiris-catches-activity-in-the-act/ [credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA]
Active Pit http://www.esa.int/spaceinimages/Images/2015/01/Active_pit [credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA]
Depiction of Philae‍‍ '​‍s planned touchdown on the comet http://en.wikipedia.org/wiki/Philae_

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In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 is kind of important to understanding the Great War. You'll learn about Franz Ferdinand, Gavrilo Princip, the Black Hand, and why the Serbian nationalists wanted to kill the poor Archduke. You'll also learn who mobilized first and who exactly started the war. Sort of. Actually, there's no good answer to who started the war, but we give it a shot anyway.

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When outbreaks happen, we need to be able to predict the course they’ll take in the future, but of course we can’t run experiments on real people to figure that out. Thankfully we can simulate outbreaks and use models to find out how different scenarios could play out! In this episode of Crash Course Outbreak Science, we’ll look at what models are, how they help predict the course of an outbreak, and how we can use them to manage real world outbreaks.

This episode of Crash Course Outbreak Science was produced by Complexly in partnership with Operation Outbreak and the Sabeti Lab at the Broad Institute of MIT and Harvard—with generous support from the Gordon and Betty Moore Foundation.

Sources:
https://www.sciencedirect.com/science/article/pii/S0378437118308896
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6002118/
https://web.stanford.edu/~jhj1/teachingdocs/Jones-on-R0.pdf
https://www.nature.com/articles/d41586-020-01003-6
https://globalhealth.harvard.edu/understanding-predictions-what-is-r-naught/
https://meltingasphalt.com/interactive/outbreak/

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Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
DL Singfield, Jeremy Mysliwiec, 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 Y, 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
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Women have been a powerful (and largely underappreciated) force in the movement for Black equality in the United States. The Black Power Movement is no exception to that trend. Today, we'll learn about how women contributed to several organizations, including the Black Panthers. We'll also explore how the Black Arts Movement served as a way for women to empower Black People through creative output.

Clint's book, How the Word is Passed is available now! https://bookshop.org/books/how-the-word-is-passed-a-reckoning-with-the-history-of-slavery-across-america/9780316492935

VIDEO SOURCES
● Cheryl Clarke, “After Mecca”: Women Poets and the Black Arts Movement (New Brunswick, NJ: Rutgers University Press, 2004).
● Ashley D. Farmer, Remaking Black Power: How Black Women Transformed an Era (Chapel Hill, NC: University of North Carolina Press, 2018).
● Peniel E. Joseph ed., The Black Power Movement: Rethinking the Civil Rights-Black Power Era (New York: Routledge, 2006).
Robyn C. Spencer, The Revolution has Come: Black Power, Gender, and the Black Panther Party in Oakland (Durham: Duke University Press, 2016).
https://atlantablackstar.com/2015/03/26/8-black-panther-party-programs-that-were-more-empowering-than-federal-government-programs/
https://spartacus-educational.com/USACnewtonF.htm


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:
Justin Snyder, April Frazier, Dave Freeman, Hasan Jamal, DL Singfield, Amelia Ryczek, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Michael M. Varughese, Kyle & Katherine Callahan, Laurel Stevens, Michael Wang, Stacey Gillespie (Stacey J), Burt Humburg, Allyson Martin, Aziz Y, Shanta, DAVID MORTON HUDSON, Perry Joyce, Scott Harrison, Mark & Susan Billian, Junrong Eric Zhu, Alan Bridgeman, 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, Constance Urist, Alex Hackman, Jirat, Katie Dean, Avi Yashchin, NileMatotle, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks
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Not sleeping for days on end. Long periods of euphoria. Racing thoughts. Grandiose ideas. Mania. Depression. All of these are symptoms of Bipolar Disorder. In this episode of Crash Course Psychology, Hank talks about mood disorders and their causes as well as how these disorders can impact people's lives.

Want more videos about psychology? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!

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Chapters:
Introduction: Bipolar Disorder 00:00
Mood Disorders 1:15
What are Moods? 2:00
Depressive Disorders 2:50
Bipolar Disorder 4:31
Genetic Causes of Mood Disorders 5:48
Environmental Triggers of Mood Disorders 6:14
Mood Disorders & Gender 6:45
Mood Disorders & the Brain 7:05
Social-Cognitive Perspective on Mood Disorders 7:58
Review & Credits 9:13
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You're already learning on YouTube — why not get college credit for it? https://link.gostudyhall.com/my1

There is a lot of stress and anxiety around college, whether you're fresh out of high school or you've decided to go back to school years later. It can be tough to navigate. But, one of the best ways to navigate keeping yourself focused so you can succeed is by being aware of the pitfalls. This way, you can head into your college experience with open eyes and the knowledge of the places and people you can turn to for help.

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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
3:37 - Physical Health
5:19 - Mindfulness and Meditation
6:11 - Special Interest Groups
8:00 - Conclusion
_______________________________________________

Resources used in this video:
Crisis Text Line (text HOME to 741741-free 24/7 support via text)
National Suicide Prevention Hotline (free 24/7 support over the phone)

What Is Mental Health? | MentalHealth.gov
Active Minds' Student Mental Health Survey - Active Minds: https://www.activeminds.org/active-minds-student-mental-health-survey/
Sleep problems in university students – an intervention (nih.gov): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5536318/
How Long Should You Wait Between Caffeine and Bedtime? (verywellhealth.com): https://www.verywellhealth.com/how-long-should-you-wait-between-caffeine-and-bedtime-3014980
4 - 7 - 8 sleep - Arizona State University - updated 1-26-15 - YouTube: https://www.youtube.com/watch?v=0J-AH0GihS0
Should You Take a Leave of Absence? | BestColleges: https://www.bestcolleges.com/blog/leave-of-absence-college/

Learn more about Federal Student Aid: https://studentaid.gov/h/understand-aid

***
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:
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
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CC Kids: http://www.youtube.com/crashcoursekids""""

#CrashCourse #HowtoCollege #StudyHall"

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In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct. John will talk about the Hobbes versus Rousseau debate, the effects that war has on human social orders, and the effects that war has on individuals. So is war human nature? Watch and find out what we have to say about it.

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In which John Green teaches you a little bit about drought, which is a natural weather phenomenon, and famine, which is almost always the result of human activity. Throughout human history, when food shortages strike humanity, there was food around. There was just a failure to connect those people with the food that would keep them alive. There are a lot of reasons that food distribution breaks down, and John is going to teach you about them in the context of the late-19th century famines that struck British India.

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Check-out Bizarre Beast to learn more about the Man O'War and other bizarre animals: https://www.youtube.com/bizarrebeasts

Social behavior like caring for our young, fighting off rivals, joining a pack, or even fusing together into a huge super animal like the Power Rangers, adds a whole other layer of complexity to the lives of animals out there. And it even raises questions about being, culture, and what it means to be an individual. So today, we're going to dive into the amazing ways animals interact with other animals, live a day in the life of the Portuguese Man O'War, and learn how these complex social interactions can go way beyond anything humans are capable of!

Bizarre Beasts' Man O'War video: https://www.youtube.com/watch?v=B2ph_FeB7d8

🦔🐒🐝🐛🐘🐍🐀🐠 🐢🐋🐅🦓🦇🦜🐜🪱🦑 🦀🐊

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
__

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#CrashCourse @Zoology #PBSNature

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