Gee, it's almost like people in the Americas are just like those in the Old World. 🙄
maybe their primitive level had something to do with disease and war of some kind
"It changes the way we see Amazonian cultures. Most people picture small groups, probably naked, living in huts and clearing land - this shows ancient people lived in complicated urban societies," says co-author Antoine Dorison." - BBC article
Of note here, the ecosystems in hot springs are descendants life that first emerged when conditions like that were prevalent on Earth. Our current world, for as long as it lasts, is the product of 3.7 billion years of cyclic moderation and volatile extremity. This world sits balanced atop a pillar of mineralized co2 which we are liberating like madmen.