alt Hacker NewsOne interesting techno-signature a civilization that happened hundreds of millions of years ago would be odd mineral deposits.
It's never the Silurians, but it's fun to pretend we found something interesting.
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it's more likely that they used our planet as a "greenhouse" to grow these crystals for themselves, and we're just the lichen that happens to grow on the walls as a consequence of their process
I was literally thinking ancient civilizations/aliens throughout the whole article.
Or, it's just another spin of the anthropomorphism bias we have. If anyone found those mineral what, 50 years ago? or let's say 150 to predate every quantum theory possibility... well, they would have been just nice and weird crystals with 0 importance, just because we didn't know about their properties.
But now they have suddenly a meaning so hey, maybe it's somebody like us, smart as us, that created them many eons ago to harness quantum capabilities back in the day.
It is. I wish the conspiracy theorist 'the pyramids could not have been built by humans' etc etc crowds didn't exist, because I wish there was space to theorise about pre-human, pre-ape intelligent culture just for fun.
Same with UFOs. It seems to have changed in the past few years, but for a long time interest in them was associated with wackiness, and it was not something you could really discuss with a genuine sense of interest without the stain of appearing to believe something you didn't. It's intellectually and socially important to be able to be able to be curious and speculate without the appearance of belief in something.
Oil
or rather Petroleum
I mean, can an ant tell that a highway or skyscraper is artificial?
It’s gotta be coins though.
Most famous example was Louis XIV who created medals specifically to preserve French history for future archaeologists.
At that time they realized that they knew almost everything about Romans and Greek through preserved medals.
So the King created a vast medal series (Histoire Métallique) intended to outlast paper, books, and buildings.
These bronze and gold medals were intentionally buried in the foundations of monuments like the Louvre, specifically waiting for future generations to excavate them.
So the key is: durable materials, widely spread.