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What existed before the Big Bang? Did “nothing” exist — or did time itself begin 13.8 billion years ago? In this video, we explore what modern physics says about the origin of the universe, the Big Bang theory, and whether anything existed before spacetime began. You’ll learn: • Why the Big Bang wasn’t an explosion into empty space • How Einstein’s general relativity shows spacetime can expand • What physicists mean by “nothing” in quantum field theory • The role of quantum fluctuations and virtual particles • The Planck time and the limits of modern physics • Cosmic inflation and the multiverse theory • The Big Bounce hypothesis • The zero-energy universe idea From cosmology and quantum mechanics to Stephen Hawking’s no-boundary proposal, this video examines one of the biggest mysteries in science: how the universe began — and whether “nothing” is even possible. If you’re interested in the Big Bang, cosmology explained, quantum physics, the origin of the universe, and the nature of reality, subscribe for more deep-dive science content. 00:00 - Intro 01:06 - The Big Bang Wasn't An Explosion 02:48 - When Times Itself Begins 03:57 - What Scientists Mean By 'Nothing' 05:22 - The Quantum Beginning 06:55 - The Inflation Twist 08:24 - The Problem with 'Before' 09:44 - The Bounce Hypothesis 11:22 - Multiverse Speculation 12:38 - The Energy Question 13:42 - The Real Frontier #BigBang #BeforeTheBigBang #Cosmology #OriginOfTheUniverse #QuantumPhysics #Multiverse #StephenHawking #PhysicsExplained #space #universe #spaceexploration #science #knowledge #nasa #astronomy ---------------- Copyright Disclaimer We do not fully own the material compiled in this video. It belongs to individuals or organisations that deserve respect. We use under: Copyright Disclaimer Section 107 of the Copyright Act 1976. “Fair use” is allowed for purposes such as criticism, comment, news reporting, teaching, scholarship, and research.