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Gravity can exist without mass, dark matter could be myth: Study (interestingengineering.com)

submitted 4 days ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 3 days ago (1 children)

I'd recommend Stephen Baxter's "Ring" novel as a primer on cosmic strings, domain walls (the shell-like mass described here) and using wormholes for time travel.

Basically covers all of the funky science described in this article

[–] [email protected] 2 points 3 days ago (1 children)

It's also really well written. You'll have to read the rest of the Xeelee sequence afterwards though

[–] [email protected] 2 points 3 days ago

Agreed. My favorite is still Raft