Quantum gravity proposes a new vision of spacetime from "summary" of Reality Is Not What It Seems by Carlo Rovelli
Quantum gravity challenges our traditional understanding of spacetime. This theory suggests that at the smallest scales, spacetime is not continuous but rather made up of discrete grains. These grains, or "atoms of space," interact with one another in a complex dance that gives rise to the fabric of the universe. In this new framework, gravity is not a force that acts across empty space, but rather a manifestation of the interactions between these fundamental building blocks of spacetime. The implications of this new vision of spacetime are profound. Not only does it require us to rethink the very nature of reality, but it also opens up new avenues for exploring the fundamental laws of the universe. By combining the principles of quantum mechanics with those of general relativity, quantum gravity seeks to provide a unified description of the cosmos that can explain phenomena at both the largest and smallest scales. One of the key challenges in developing a theory of quantum gravity is reconciling the discre...
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