This is not a suject I know a great deal about, so I do hope my question will be taken as coming from one who is just curious. It is assumed that people originally came to the western hemisphere over a land bridge in the far North. Then why are so many of the major archeological finds regarding early human habitations in the western hemisphere found in the far south of the hemisphere. If people came in through the North why do the sites not begin in the North. It is just that I have always wondered about that. Could people have come from the Pacific side of South America ?