"The oldest human remains found in the Americas were recently "discovered" in the storeroom of Mexico's National Museum of Anthropology. Found in central Mexico in 1959, the five skulls were radiocarbon dated by a team of researchers from the United Kingdom and Mexico and found to be 13,000 years old. They pre-date the Clovis culture by a couple thousand years, adding to the growing evidence against the Clovis-first model for the first peopling of the Americas."
"Of additional significance is the shape of the skulls, which are described as long and narrow, very unlike those of modern Native Americans.
BTW, the Sa'ami claim is based much more on DNA found among Indian tribes than just the foundations of the visible Solutrean/Clovis culture. The DNA says 14,000 ~ right at the start of the big meltdown. It may even be earlier. Their initial settlements are covered by water, so that's where you get that apparent 2000 year lag.
I saw something on a program on NatGeo a few months ago regarding these skulls. I’m endlessly amazed that so many in the research community can’t grasp that people have been going wherever they wanted to go ever since they figured out that wood floats and can be piloted with oars, never mind that exploration and trading is probably hard-wired in all humans from day one.
Interestingly, Caribs and other tribes in the Americas tied boards to the skulls of babies to elongate them, which they considered a mark of the upper class.