Kind of like "keniwic (sp?) man", huh? I agree. There ARE wonders to be discovered and those already discovered that haven't been seen by many in the USA. Near where I live are the most amazing sand dunes that stretch for hundreds of miles in length but are only a few miles wide. They are thought to be the "beach" of the prehistoric inland sea that covered much of the Great Plains.
It looks like Kennewick man was firmly resident and his family, too. He wasn't a casual visitor. I wouldn't doubt that anybody who could build a boat could have ended up in America someplace, and people have been building boats for a long time. I would expect to find evidence of every type of people there is as archaeologists continue to dig.