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This product uses TMDB and the TMDB APIs but is not endorsed, certified, or otherwise approved by TMDB.
Quantum theory accounts for a remarkable array of particles and forces-but not gravity. Learn why constructing a successful theory of quantum gravity has vexed physicists for nearly a century. Professor Carroll lays the groundwork for discussing the Many-Worlds perspective on gravity by focusing on two popular alternative theories: string theory and loop quantum gravity.
