Researched and Written by Leila Battison Narrated and Edited by David Kelly Thumbnail Art by Ettore Mazza If you like our videos, check out Leila's youtube channel: https://www.youtube.com/channel/UCXIk7euOGq6jkptjTzEz5kQ Music from Epidemic Sound and Artlist. References: For Big Bang: https://www.forbes.com/sites/startswithabang/2018/07/27/there-was-no-big-bang-singularity/?sh=e6773577d815  https://www.space.com/31192-what-triggered-the-big-bang.html  https://www.forbes.com/sites/startswithabang/2017/09/21/the-big-bang-wasnt-the-beginning-after-all/?sh=53f4c6f655df  https://www.amnh.org/learn-teach/curriculum-collections/cosmic-horizons-book/georges-lemaitre-big-bang  https://www.quantamagazine.org/physicists-debate-hawkings-idea-that-the-universe-had-no-beginning-20190606/  https://www.uwa.edu.au/science/-/media/Faculties/Science/Docs/Evidence-for-the-Big-Bang.pdf  https://www.britannica.com/science/steady-state-theory  http://www.xn--academiadascincias-6wb.va/content/accademia/en/publications/acta/acta24/hawking.html https://www.scientificamerican.com/article/a-recycled-universe/ Image credits: Hooker telescope interior By Ken Spencer - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=31387206 Holmdell Horn Antenna By Erik Dunham - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=21364518 Particle accelerator By gamsiz - Flickr, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=3699979 Observable Universe By Andrew Z. Colvin - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=71065251 University Southern CA By Padsquad19, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3326162 Quantum Tunneling By MaximeMartinez - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=94834437 Doheny Library By Padsquad19, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3326171 00:00 Introduction 04:33 Why Must It Begin? 11:00 The Moment That Breaks Physics 17:52 Before? 21:30 Why