All we have there is speculation and a lot of silence in the contemporary scripture that has also gone unremarked. If they are so important, why are folks then not talking about them? It appears once that global society was literally built around these things almost everywhere. And we know nothing that we can trust.
Most disconcerting is our continuing studied ignorance. This is turning out to be the most important single fact of our entire human prehistory and no one cares? I do think that the monkeys are running the educational and scholarly zoo..