Get Merch designed with ❤ from null Join the Patreon Bird Army 🐧 https://kgs.link/patreon ▼▼ More infos and links are just a click away ▼▼ Sources & further reading: https://sites.google.com/view/sourceslifeandsize3 In and out, in and out. Staying alive is about doing things. This very second, your cells are combusting glucose molecules with oxygen to make energy available, which keeps you alive for another precious moment. To get the oxygen to your cells you are breathing. Breathing is an answer to a very hard problem: How do you get the resources that your cells need to survive, from the outside, to the inside of your cells? Every living thing has to solve this problem and the solution is surprisingly different depending on one of the most important regulators of life: Size. 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/36hTooO Bandcamp: https://bit.ly/38jHFJb 🐦🐧🐤 PATREON BIRD ARMY 🐤🐧🐦 ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Many Thanks to our wonderful Patreons from http://kgs.link/patreon who support us every month and made this video possible: Vincent Mascio, Gabriel Sucia, Артем Ярошенко, Thomas Hradek, Nebual, Rodrigo Espinosa, Jacobo Loewen, Kirsten Mann, Matias Altalef, Renato Vassão, triger traiger, Richard Decal, SmokinBuddha, R D, William Lucca, John Teeslink, Yrjosmiel, Tomasz Stachowiak, WE1RD, ScorchedShadow, Zach Knibbs, jrinehimer, Michael, Conner Boltz, Sidong Fu, Jake Kish, Caeruleus, Gleb Radchenko, Kieren Quinn, Augustine, Che Tao, Biken Gurung, Adelina Bakieva, Alex Ellis, Trevor Shackelford, Graham Gersdorff, Aditya Taday, Chaitali Sura, Rhys Clark, Trymian Cassidy, Anton Vietrov, Samuel Blanchard, libor riska, Julia VS, Stoney Bair, Nika Chkhartishvili, Erwin Ritua, Nicholas Roth, Mark Pickenheim, Haaxor1689, Niklas, Sean K Reynolds, Mark Gubatan, Caleb Biasco, MoeMoep, Edmund Sang Fontaine, Silquetoast, Randy Cully, Joseph Schadler, Matt Cameron, x yxy, Elie & Mary-Anne, Alaina Kramer, Memes, Dragon's Demize, Caleb Whitaker, KushrenadaT, Andrei, Daniel Suzuki, Jett Thomas, Laszlo Steinhoff, Alexander Brown, Braden Culbert, Sarah, Corey Austen, Gosia Rychlik, Евген Останинов, Neo Martin, Anonimas, Nicolas Sepulveda, Nicole de Vries, Maryam Sheybanifard, John Forbes, ertojo, Zaten the Changeling, Dmytro Haranzha, Matt Clarkson, G Crockett, Brennen Schott, Mirek Novak, Pedro Lozano, Oskar Syahbana, Robin, Porky Hontas, Sebastien J, Eileen Kirschner, Peyton Groshart, Martin, Jan Ryklikas, Dr. Daniel Lehmann, Le plus Luc de tous les Luc, yeapea [Andi], Ansgar Rust, Jan Karsten, Hichem Moussa VoulezVouloz, Morbeyn, Sjoerd Smit, Julian Hiorns, The Wanton Dogfish, Alice Whiteway, Jordan Lake, Whitney Warren, Moses Holmström, Morgan