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Joined 2 years ago
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Cake day: June 13th, 2023

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  • The problem with matter that doesn’t interact electromagnetically is that everything else can pass right through it. (That’s why dark matter theoretically remains in halos around galaxies instead of getting incorporated into galactic discs via friction with other matter.)

    If dark matter can only interact via gravity, it can only attract other matter toward it (albeit very weakly)—including both matter and antimatter. So it can’t keep matter and antimatter apart.

    You’d also have no way of manipulating the dark matter itself, except through gravity.