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The first Native Americans did not bring Clovis technology with them. We know that there were settlements like Rimrock Draw cave in Oregon that predate Clovis by a good margin. I know a photographer from the dig. As of now they have solid dates to 18500 BP and there is a smattering of deeper material that hasn't been dated yet. The fossilized trackway at White Sands, NM goes back to about 23,000 BP. There are other sites being excavated that may prove older than either. Nothing, though, in the way of settlement residuals that exceed 30K years and certainly nothing matching the proposed / purported mammoth bones said by some to be human-affected dated to 130K years. For the moment, it looks like Clovis did not derive from Solutrean technology from Europe as proposed, it really was near-parallel development. If Clovis tech were descended from Solutrean tech, we have another problem because there is no DNA in any existent Native American population dating from the same rough time, none. This means that somehow the Asian-descended "Native" tribes would have had to have understood and adopted the Solutrean technology yet killed every single European -sourced person so that there is ZERO DNA passed along. If Clovis technology was imported, it was into a continent already peopled by those using other technologies. Possible. Also possible it was derived in place .. that improbable but not impossible parallel evolution idea. South America is a different puzzle. One piece interesting to me is the yam / sweet potato. Apparently it is indigenous to the south pacific islands. I is maybe reasonable that some could have washed up on South America and taken root, but if so, why do the south American natives use exactly the same word as the south pacific islanders for it? This points to earlier contact than we currently think possible. We could ask why the Olmec heads' features appear sub Saharan African. Coincidence of artistry or .. familiarity with people from continents that shouldn't theoretically have been able to contact each other. We have to be a bit cautious about timelines though. A friend years back was sure that South American and African people migrated back and forth overland before the mid Atlantic Ridge took over. Hah hah, missed by a couple hundred million years. Oops.