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Quantum gravity seeks to unify general relativity and quantum mechanics from "summary" of La vita del cosmo by Lee Smolin

Quantum gravity is a field of physics that aims to bring together two fundamental theories of the universe: general relativity and quantum mechanics. General relativity describes the force of gravity as a curvature of spacetime caused by mass and energy, while quantum mechanics deals with the behavior of matter and energy on the smallest scales of existence. The challenge lies in reconciling these two theories, which operate in very different ways. General relativity works well on large scales, such as those of planets, stars, and galaxies, where gravity is the dominant force. On the other hand, quantum mechanics is successful in describing the behavior of particles at the subatomic level, where the other fundamental forces, such as electromagnetism and the weak and strong nuclear forces, come into play. The problem is that when we try to apply quantum mechanics to the force of gravi...
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    La vita del cosmo

    Lee Smolin

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