The question of when people first entered the Americas has plagued archaeologists for more than a century, and the origin of the indigenous inhabitants of the western hemisphere has attracted scholarly speculation for more than four hundred years (Fiedel 2000). Discussions about the time of the first human migration largely revolve around two issues. First, there has been much debate about whether certain fractured rocks and animal bones are the product of human behaviour. Secondly, there have been numerous controversies about sites that appear to contain artifacts, but whose dating is in question. This paper concerns the first...

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