This is why a I think it is a bad article. He first proposes some far-outlier theories, which need extraordinary proof as he acknowledges himself. He does not give it in the article which propels his theory in the realm of fantasy. His article would be way more honest if he would describe it as pure speculation, instead of shoehorning all kinds of finds or theories into his flight of fancy.

I mean it is a fantastical idea, and if we ever find a laptop from 10000bc I would be stunned, or if we find marsian burial chambers, but the probability just isn’t very high on what we observed sofar.

That isn’t to say a lot is lost to history, which skews our interpretation, especially prehistorical, but that would warrant a different kind of article.