CGP Grey: The Trouble With Tumbleweed

Teacher or professor: CGP Grey
Subject: Science
Content of the Lesson: Director's commentary: https://www.youtube.com/watch?v=rbHQObTeLDM ## Crowdfunders: Bob Kunz, Steven Snow, John Buchan, Nevin Spoljaric, Donal Botkin, Phil Gardner, Chris Chapin, Richard Jenkins, Martin, Steven Grimm, سليمان العقل, Colin Millions, Michael Mrozek, Saki Comandao, Jason Lewandowski, Andrea Di Biagio, David F Watson, rictic, Ben Schwab, Marco Arment, Elliot Lepley, Shantanu Raj, emptymachine, Bobby, Chris Amaris, George Lin, Mikko, Derek Bonner, Derek Jackson, Orbit_Junkie, Ron Bowes, Tómas Árni Jónasson, Henry Ng, Jordan Earls, Joshua Jamison, Nick Fish, Nick Gibson, Robert Webb, Jeffrey Podis, Thunda Plum, Awoo, David Tyler, Fuesu, iulus, Kevin Costello, Michael Reilly, Tyler Bryant, Kermit Norlund, chrysilis, David Palomares, Erik Parasiuk, ken mcfarlane, Leon, Tristan Watts-Willis, Veronica Peshterianu, Bear, Emi, Esteban Santana Santana, Freddi Hørlyck, John Rogers, Maarten van der Blij, Peter Lomax, Rhys Parry, ShiroiYami, Dag Viggo Lokøen, John Lee, Maxime Zielony, Elizabeth Keathley, Frederick The Great, Luxe Gifts, Rebecca Wortham, Bryan McLemore Music by Music by: http://www.davidreesmusic.com


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