Cool stuff. I think that we have to start thinking about the idea that folks were here long before that arbitrary 12-13,000 years ago time frame. People were scarce and their stuff is very hard to find, but I did hear about one find recently in the Eastern US that appears to be from like 1000 years before the Clovis date. Were these guys in Colorado traveling to hunt or were they TRADING for these very complex for the day tools with other people? We are also seeing some new questions about how early people might have shown up in SOUTH America. The Monte Verde site in Chile shows signs of occupation from perhaps as long as 18,500 years ago. One site in Brazil may be as much as 30,000 years old, but scientist claim that there is no definitive proof.