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I think it's been fairly obvious for a long time that dark matter and dark energy are fairy tales invented to make our flawed theories fit the data.

I'd just quibble with the phrase "fairy tales."

"Some kind of particle" is a placeholder. They are trying to figure it out, and questioning "our flawed theories" seems to be acceptable, AFAICT.

(I think "dark energy" IS more of a fairy tale, but maybe that's just me)