From Sabine Hossenfelder.

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Our universe started with an incredibly rapid phase of expansion, growing exponentially before that expansion eventually slowed down. This idea is called “inflation,” but physicists are still unsure what caused the rapid expansion and why it stopped. In a new paper, researchers say they’ve come up with an elegant new explanation for that inflation. Let’s take a look.

Paper: https://journals.aps.org/prresearch/abstract/10.1103/vfny-pgc2

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