Crash Course Big History: Full Series - The Story of Dark Matter | Crash Course Pods: The Universe #6

"How do we know that dark matter is there?" In this episode, Dr. Katie Mack and John Green unpack the full story of dark matter. Head to https://policygenius.com/crashcourse to get your free life insurance quotes and see how much you could save.This show is a production of Complexly. If you want to help keep Crash Course free for everyone, forever, you can join our community on Patreon at http://www.patreon.com/crashcourse *** Support us for $5/month on Patreon to keep Crash Course free for everyone forever! https://www.patreon.com/crashcourse Or support us directly: https://complexly.com/support Join our Crash Course email list to get the latest news and highlights: https://mailchi.mp/crashcourse/email Get our special Crash Course Educators newsletter: http://eepurl.com/iBgMhY Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Forrest Langseth, Emily Beazley, Neeloy Gomes, oranjeez, Rie Ohta, Jack Hart, UwU, Leah H., David Fanska, Andrew Woods, Stephen Akuffo, Ken Davidian, Toni Miles, AmyL, Steve Segreto, Kyle & Katherine Callahan, Laurel Stevens, Krystle Young, Burt Humburg, Perry Joyce, Scott Harrison, Alan Bridgeman, Mark & Susan Billian, Breanna Bosso, Matt Curls, Jennifer Killen, Jon Allen, Sarah & Nathan Catchings, Bernardo Garza, team dorsey, Trevin Beattie, Indija-ka Siriwardena, Jason Rostoker, Siobhán, Ken Penttinen, Barrett Nuzum, Nathan Taylor, Les Aker, William McGraw, Rizwan Kassim, Vaso , ClareG, Alex Hackman, Constance Urist, kelsey warren, Katie Dean, Stephen McCandless, Wai Jack Sin, Ian Dundore, Caleb Weeks __ Want to find Crash Course elsewhere on the internet? Instagram - https://www.instagram.com/thecrashcourse/ Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse CC Kids: http://www.youtube.com/crashcoursekids