7 Theories on What Existed Before Time | 13.8 Billion Years Ago - And Before

Subscribe for more space mysteries: https://www.youtube.com/@MagneticSpaceX?sub_confirmation=1 Most people assume the Big Bang was the beginning, a clean starting line drawn at the edge of existence. But our deepest physics tells a stranger story: the void itself has been weighed and found full, faint rings in the oldest light may be fingerprints of a dead universe, and one theory says our cosmos is just the rebound of something that collapsed before. What waits at the bottom of this list rewrites what you thought you were. In this slow, atmospheric three-hour documentary, we explore seven of the most unsettling theories in modern cosmology - and what each one says about whether anything can truly begin. In this deep-dive documentary, we go deep: → The Casimir Effect: laboratory proof that empty space weighs something, measured to millionths of a Newton → Eternal Inflation: how our universe may be one bubble among infinite others spawning endlessly → Loop Quantum Cosmology: the mathematics showing our Big Bang was a Big Bounce from a collapsed predecessor → Conformal Cyclic Cosmology: Roger Penrose's detection of concentric circles in WMAP data - echoes of previous aeons → The Hartle-Hawking No-Boundary Proposal: where time itself curves away and "before" loses all meaning Some questions have no restful answers. Some answers change what you think you are. 0:00 - Introduction 2:28 - The Illusion of Emptiness: Weighing the Void 22:40 - Cosmic Bubbles: Our Universe as One Among Infinite Others 46:29 - The Big Bounce: A Quantum Rebound 1:07:32 - Echoes of Eternity: Roger Penrose's Conformal Cycles 1:36:44 - Where Time Itself Has No 'Before': The Hartle-Hawking Proposal 2:05:40 - Quantum Fluctuations: Genesis from Nothing? 2:33:26 - The Cyclic Multiverse: An Infinite Cosmic Symphony 3:02:00 - Rewriting Reality: What These Theories Mean For You 3:28:27 - Conclusion Subscribe for a new deep dive every day into physics, cosmology, and the questions science still cannot answer. FOOTAGE CREDITS Public domain: NASA's Scientific Visualization Studio (svs.gsfc.nasa.gov) Licensed under CC BY 4.0 (creativecommons.org/licenses/by/4.0), cropped, animated and captioned: NASA | ESO | ESA/Hubble | ESA | N. Bartmann | L. Calçada | M. Kornmesser | NSF | ALMA | NAOJ | NRAO | D. Coe | Digitized Sky Survey 2 | J. DePasquale | M. Zamani | Nick Risinger | R. J. Foley | A. Benitez-Llambay | A. Cikota et al. | A. Nierenberg | A. Pagan | A. Simonnet | AUI | AURA | B. Welch | Bronzwaer | CLASH team | CSA | CTIO | D. Li | D. Milisavljevic | D. O’Ryan | Dana Berry | Dark Energy Survey | Davelaar | DECam | Digitized Sky Survey | DOE | E. Slawik | ESA/Webb | Falcke | FNAL | G. Anand | G. Bacon | G. Caminha | G. Illingworth | G. Mahler | Gravity Consortium | H. Ebeling | HUDF 2012 Team | I. Labbé | I. Pasha | J. Banovetz | J. Dalcanton | Klaus Dolag | L. Guzzo | L. Shatz | L. Wheatley | LIGO | M. A. McDonald | M. Alvarez | M. Meneghetti | Mark Garlick | Moscibrodzka | Nicolle R. Fuller | NOIRLab | Olga Cucciati et al. | P. Gómez | P. Natarajan | P. Oesch | P. van Dokkum | R. Bouwens | R. Ellis | R. Kaehler | Radboud University | Rizzo et al. | S. Fujimoto et al. | S. Jha | Science Team | SkyWorks | Sonoma State University | STScI | T. Abel | T. Kitayama | T. Treu | University of Warwick | VIMOS-VLT Deep Survey | VIPERS survey | Volker Springel et al. #Cosmology #BeforeTheBigBang #SpaceDocumentary #QuantumPhysics #Multiverse