Where Does the Universe End — Dirac Explains

Where does the universe end? Observable universe, infinite space, multiverse, Big Bang origin and the shape of the cosmos explained by Dirac in English. Does the universe have an edge? Most people imagine a boundary — a wall where space stops. The real answer is far stranger. In this video, we explore what "the end of the universe" actually means in physics: the difference between the observable universe and the full universe, why our cosmic horizon is 46 billion light years despite the universe being 13.8 billion years old, how space expands faster than light at large distances, the three possible geometries of the universe and what each means for whether it ends, why an infinite flat universe means you repeat infinitely somewhere out there, the no-boundary proposal of Hawking and Hartle, eternal inflation and the multiverse of bubble universes, and why asking what came before the Big Bang may be as meaningless as asking what's south of the South Pole. Honest, precise, and ending where science always ends at its best — at the edge of what we know and the vast territory of what we don't. #PaulDirac #Dirac #QuantumPhysics #QuantumMechanics #Physics #TheoreticalPhysics #ScienceFacts #MindBlowing #ScienceExplained #ParticlePhysics #Antimatter #Nobel Prize #Scientist #PhysicsLovers #ScienceLovers