You can find our beautiful education posters, useful notebooks and cozy sweaters in our shop now: null Sources & further reading: https://sites.google.com/view/sourceskardashevscale/ The observable universe is a big place that has been around for more than 13 billion years. Up to two trillion galaxies made up of something like 20,000 billion billion stars surround our home galaxy. In the milky way alone scientists assume there are some 40 billion earth like planets in the habitable zone of their stars. When we look at these numbers it is hard to imagine that there is nobody else out there. OUR CHANNELS ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ German Channel: https://kgs.link/youtubeDE Spanish Channel: https://kgs.link/youtubeES HOW CAN YOU SUPPORT US? ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ This is how we make our living and it would be a pleasure if you support us! Get Merch designed with ❤ from null Join the Patreon Bird Army 🐧 https://kgs.link/patreon DISCUSSIONS & SOCIAL MEDIA ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Reddit: https://kgs.link/reddit Instagram: https://kgs.link/instagram Twitter: https://kgs.link/twitter Facebook: https://kgs.link/facebook Discord: https://kgs.link/discord Newsletter: https://kgs.link/newsletter OUR VOICE ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ The Kurzgesagt voice is from Steve Taylor: https://kgs.link/youtube-voice OUR MUSIC ♬♪ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ 700+ minutes of Kurzgesagt Soundtracks by Epic Mountain: Spotify: https://kgs.link/music-spotify Soundcloud: https://kgs.link/music-soundcloud Bandcamp: https://kgs.link/music-bandcamp Youtube: https://kgs.link/music-youtube Facebook: https://kgs.link/music-facebook The Soundtrack of this video: Soundcloud: https://bit.ly/2Ezt6Ek Bandcamp: https://bit.ly/3gwZzJP 🐦🐧🐤 PATREON BIRD ARMY 🐤🐧🐦 ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Many Thanks to our wonderful Patreons from http://kgs.link/patreon who support us every month and made this video possible: Taimur Ijaz, Tony, Michael Baughman, Andrew Hui, Sleepy, Kyle Wayman, Ryan Newsome, Jeremy Southgate, Anthony Stellato, Cartasiand, MabodofuTK, Manuel Mayer, Christine, Thomas Mann, Brandie Andrews, Ricardo Anjos, JR 1, William Marshall, Desirae Pulido, asher flatt, Garrett, 김sha, Ryan Collier, Jan Sjögren, Giorgio Bettineschi, Nick W, Gabriela, Calum Calder, Adam Haspel, Arthur Pemberton, mark faber, Aidan Izuagbe, Andrew Whitman, Nadia Guarracino, Murat Kuş, Zyra Nembhard, Will Jones, Pawel Kozlowski, Coen John, Daniel Moxham, Shanice Codner, Spyro, Brian Monahan, Joris Oosterhuis, Hari prasanth, Maarten Jacobs, Brian Chan, Sanjay Upreti, Richard Selfridge, Marc-André Dubois, Greg Sullivan, Tassos Kanellakopoulos, Daniel Küster, Austin Fenton, Michael Levin, Conrad Mera, Philip Schillmaier, Claas Fandré, Alex Porter, Thomas Krause, Thorsten Karras, Elora Vink, Vincent M, Patrick Gormley, Jasson Schrock, Erorus, Bradley Kinder, david harvey, Nick Smit, Zachary Rice, Lanae, Gijs Cremers, Rhys Patterson, TasteofChoklit, Justin Griffith, Christopher Cone, Rylo, Bryan Reckamp, Feldrick, William Grunow, Russell Wiggins, Leigh Candalino, Matthew Stanford, Sun, Valeriy Whaler, John Paine, Alex Cimpean, Valerie-Maria Oberreiter, Mariya, ClownWhosFeelnDown, Isaac Hewins, Raymond Tse, Lucas Mendelson, Ovi Postel, Saru, Chris Gelme, Andrew Podolecki, Dennis, Sirik Loosman, Bumbrazz, Joshua Westgate, Gaëtan Séverac, yourcheapdate, Calin Tuns, Nicholas Broad, Marcel Thekook, James DuBoise, Lars Naurath, Joris Crevecoeur, Lars Comstock, Kevin Walsh, Matthew Bae, Jackson Mehr, Thomas Roggina, António Martins, Dimas Herlambang, James, Luke Wolf, Gilbert McCray, Ingmi Eißfeld, Caleb D, RJ, Filippo Guiducci, Luiz Siqueira, Luc Leonard, massimo ales, Theo Wolfe, Julian Rodriguez, Callan McLoughlin, Tommaso Caudullo, Happy Juice, Julian Ma, Robert Erickson, Henry Shew, Kayla Ford, Rémi Pichon, Wyatt Powell, MelissaBee, Emily T, Milo Vermeulen, Benjamin