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It's clear you didn't even try to read the article.

They mapped the distortion effects on visible light thought to be caused by dark matter. They don't know what it is or how it works, but they know _something_ is causing apparent distortion to the light.

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That _something_ might as well be interdemensional pixies.

Won’t it be interesting when our model of physics is updated to explain these cosmological phenomena? Who knows what new technology will be discovered as a result!

My brother once jokingly suggested that Dark Energy is the waste product of the power sources of alien civilisations.

(Neither of us is a physicist, but it’s an interesting idea for a short story).

There's a very old short story I've never been able to find again that beat you to it.

Every civilization that discovers FTL travel contributes to a more rapid expansion of the universe. The older civilizations beg them to stop, but inevitably they fail.

That sounds like a fun read. I’d love to know the title if you remember.

Sure, just so long as the pixies don’t interact electromagnetically, or strongly with each other by anything except gravity.

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