Heh... or maybe they’re just big “Open” signs for some kind of space biz.
I recalled where I read that about red giants being dyson spheres, it was John C. Wright talking about big hooks for his new sci-fi book. I think he also said things like huge sources of x-ray and other radiation, black holes and novae were actually artificial. And that it never occured to anyone that some folks would think it was natural, and devolop ridiculous scientific theories about what was actually intelligent manipulation upon a huge and slow scale, like wars and signal beacons but on a galactic scale and time frame. Like the reverse of Fermi, the evidence is everywhere one looks almost, it’s just so big and slow we can’t even see it for what it actually is, because we have a hard time imagining something so big and on such a slow time frame could be anything besides nature working.
Freegards