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Artwork for Quantum Gravity wars: Secrets behind the Gravity and elusive particles
Quantum Gravity wars: Secrets behind the Gravity and elusive particles · Dec 18, 2025 · 36 min

The Big Bounce: Gravity Without Infinity

Is the Big Bang truly the beginning, or just a moment in an eternal cosmic cycle? This episode investigates Loop Quantum Cosmology (LQC), the application of Loop Quantum Gravity that challenges the concept of infinite density. By treating gravity as the geometry of spacetime itself, LQC introduces a repulsive quantum force that prevents the universe from collapsing, suggesting our universe was born from a "bounce" rather than a bang. We will also look at the hunt for proof: from "Planck stars" hiding inside black holes to the search for "threshold anomalies" in gamma-ray bursts that could prove space is granular. Tune in to understand why LQG is the leading background-independent rival to String Theory and how it attempts to answer the ultimate question: What is the shape of space?

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Is the Big Bang truly the beginning, or just a moment in an eternal cosmic cycle? This episode investigates Loop Quantum Cosmology (LQC), the application of Loop Quantum Gravity that challenges the concept of infinite density. By treating gravity as the geometry of spacetime itself, LQC introduces a repulsive quantum force that prevents the universe from collapsing, suggesting our universe was born from a "bounce" rather than a bang.

We will also look at the hunt for proof: from "Planck stars" hiding inside black holes to the search for "threshold anomalies" in gamma-ray bursts that could prove space is granular. Tune in to understand why LQG is the leading background-independent rival to String Theory and how it attempts to answer the ultimate question: What is the shape of space?

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