[AlotOfReading]

We've definitively established that Clovis populations and all modern Native Americans are genetically related to Beringian populations out of Eurasia. It's reasonable to suspect pre-clovis populations probably came from much the same area, especially given that suggested pre-clovis lithics so closely resemble clovis traditions.

Additionally, the farthest east that we've found evidence of Australasian populations is the Solomon islands, some 7,000+ mi from South America. There's no evidence of habitation on the intervening islands until Austronesian peoples show up much later. As for Africa, we simply have no evidence for it whatsoever.

[twobitshifter]

There actually is some evidence. I remembered this article but I’m no expert. https://www.smithsonianmag.com/science-nature/dna-search-fir...

[AlotOfReading]

The authors' speculation that this was due to both populations originating in east Asia eventually turned out to be true once further work was done on sequencing Tianyuan man [1]. It's not indicative of Pleistocene trans-pacific contacts.

[1] https://doi.org/10.1016/j.cub.2017.09.030