New Theory Inspection: Is the Universe a Bubble? I had a look

From Sabine Hossenfelder.

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I recently saw a new paper that claims our observations could be better explained if the universe was surrounded by a shell. According to the author, that could do away with dark energy and alleviate the Hubble tension. I had a look at the paper.

The paper is here https://www.mdpi.com/2674-0346/3/3/14

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