**Many theoretical approaches that work toward a quantum theory of gravity suggest that all of spacetime should be filled with an energy that is as much as 10 ^{20 }times larger than observations allow. Theorists have proposed various tweaks to make this energy go away, but a new proposal hints at a different type of solution: the energy really is huge, but it has no large-scale significance for cosmic expansion because its effects cancel out on the very smallest scales.**

Category: Science

Published on Friday, 27 September 2019 13:09

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