I’ve been asking this question for years.
If there were indeed millions and millions of aboriginal Americans infesting the continent, we ought to be up to our necks in physical remains (i.e., skeletons) as well as burial sites.
But I get called names whenever I bring up the subject.
Well, all their Paleolithic SUVs caused global warming, the seas have risen hundreds of feet and flooded all the coastal plains where many once lived.
I’m with you on that. Sometimes logic isn’t appreciated.
There are a lot of burial sites. But also keep in mind it’s a big country, most of it is still wild, and human remains are small, and tend to disintegrate really well.
Souix exposed bodies on scaffolds, dome tribes buried the bodies, then exhumed the bones and deposited them in mass burial pits. In that culture, hunter gatherer, the population must have been quite small until cultivation of maize, beans and squash.