1. Ancienttraces can show up as odd mineral deposits > “One interesting techno‑signature a civilization that happened hundreds of millions of years ago would be odd mineral deposits.” – rbanffy
2. UFO/alien speculation is now normalized and socially charged
“It is. I wish the conspiracy‑theorist ‘the pyramids could not have been built by humans’ … crowds didn’t exist, because I wish there was space to theorise about pre‑human, pre‑ape intelligent culture just for fun.” – vintagedave
3. Distinguishing natural anomalies from true artificial signatures is difficult; purity and anthropomorphism bias shape interpretation
“It means that if you remove the meaning humans give to to, it’s much easier to explain it as a coincidence, something that is produced naturally and it just happens to have the right property.” – darkwater