Mexican Cave Find Hints That People Lived in North America 30,000 Years Ago

The Wall Street Journal ^ | 22 July 2020 | Robert Lee Hotz

[Sam Gamgee]

I was thinking can you derive the date civilization began in Mesopotamia mathematically? Start with the latest year we have consistent population data, so for example 1899, then account for death rates and birth rates, and track backwards until we get the first tribe of humans? Or is that far too complex?

[Alas Babylon!]

Those were much more recent (since 200 BC or so).

The original South Americans were Australoid, i.e., Australian Aborigines.

Ancient DNA link connects Australians, South Americans

BBC: Sci/Tech 'First Americans were Australian'

[Varda]

Thanks for those links. I'm aware of those ideas. They were interesting at first but haven't been corroborated in other research.
The first link is about "“Population Y”. This relationship with Australoids has been found before. Because it's been found doesn't neccesarily mean Aborigines sailed to America. Australoids were widespread in the Pleistocene and occupied territory into present day China. Probably resulted in gene flow between the Asian groups.
Late Pleistocene exploration and settlement of the Americas by modern humans "The Lagoa Santa individuals and some contemporary Amazonian tribes share a subtle genetic connection with Indigenous New Guineans, Australians, and Andaman Islanders (6, 8, 12, 20). This signal appears to be derived from an extinct ancient ancestor of both groups (Population Y), but does not represent a migration of a group of Australasian ancestors to the Americas."
The second link is about Walter Neves work using skull morphology. This was a popular method in the 19th century. Neves at first claimed Lucia had African or Australoid morphology. When it was pointed out that Africans and Australoids are the least related modern humans, he switched to just Australoid. The bottom line of his work is that the genetic evidence shows that you can't make the connection he's trying to make. The long time frames allow for wide physical variation between ancient ancestors and modern descendents.

[Alas Babylon!]

Sure, I follow you.

The fact is, we were much closer together genetically, 30-40,000 years ago than today. I think the DNA proves that.

Also, as the last of the maximum glaciation bore down on the North, people were forced or herded if you will, South of the Himalayas or up through the ice-free long grass tundra of the steppes. Prime mammoth lands which could take you very far over time. That's what they say led to the Amerindians.

Those Southern route people became the Australiods, and the North Asian or Eurasian people gave rise to the Caucasiods, Mongoloids and the non-specialized Mongoloids who would become Amerindians. So genetically, they were just two big gene pools for a while.

Did the Australiods, coming up the coast from Southeast Asia become the remnants that gave rise to the Japanese Ainu, yet could have had a continued Northward drift which would also take them to Berengia, and then on to the Americas, to merge again with the Northern Mammoth hunters who became the non-specialized Mongoloids?