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2+ Hours of Brian Greene on What May Have Existed Before the Universe Join renowned theoretical physicist Brian Greene for an extraordinary 2+ hour exploration of one of the deepest mysteries in all of science: What, if anything, existed before our universe came into being? In this mind-expanding journey, Brian guides you through the cutting-edge theories and revolutionary ideas that challenge everything we thought we knew about the origin of existence itself. From the moment of the Big Bang to the speculative realms that might have preceded it, this is cosmology at its most profound and accessible. What You'll Explore: 🌌 The fundamental question: Can we even talk about "before" if time itself began with the universe? ⚛️ Quantum creation from nothing—how the universe might have tunneled into existence from pure vacuum 🫧 Eternal inflation and the multiverse: Our universe as one bubble among infinite others 🔄 Cyclic cosmology: Endless cycles of Big Bangs and Big Crunches stretching infinitely into past and future 🧬 Brane collisions in higher dimensions: Could our Big Bang have been caused by colliding universes? ⏰ The Hartle-Hawking proposal: Time emerging smoothly from a timeless quantum state 🎯 The arrow of time and entropy: Why the universe started in such a special, low-entropy state 🤔 Deep philosophical questions: Causation, existence, and why there's something rather than nothing Perfect for: Science enthusiasts, curious minds, philosophy lovers, and anyone who's ever looked at the night sky and wondered about ultimate origins. Brian makes the most complex physics accessible without dumbing it down. Key Topics Covered: The Big Bang: What we know and what we don't Cosmic inflation and repulsive gravity Quantum mechanics at cosmological scales The nature of time itself String theory and extra dimensions The multiverse hypothesis Anthropic reasoning and fine-tuning The fate and future of the universe What physics can and cannot tell us about ultimate origins This isn't just a physics lecture—it's an invitation to think deeply about existence, reality, and the most fundamental questions we can ask. Brian Greene at his absolute best. 🔔 Subscribe for more deep explorations of theoretical physics, cosmology, quantum mechanics, and the nature of reality!