Theory: photosensitive matter (i.e. not dark matter) is sought after by some dark matter alien(s) in our universe. they contrive a way to convert light matter into dark matter + energy. The aliens tried to test this on one star, but they accidentally did it to every part of their region of space above a certain density threshold, converting everything larger than the smallest stars to concentrated, extremely hot dark matter. This is also a cataclysm for the dark matter environment I assume, but I'm not sure how.
this post was submitted on 11 Sep 2026
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Worldbuilding
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