This was late '70s, circa '78-'80. By then, we had Adovasio and associates publishing about Meadowcroft(a pre-clovis site), and references to Bird's work in south america. There were just a few sites that didn't fit the paradigm back then. Also the math just didn't add up for such rapid dispersal on foot. Would you hazard a guess as to just how many miles a hunter-gatherer group would migrate in a generation? I would suppose the pattern to be @ find a suitable location, exploit the flora and fauna found therein, raise a bunch of babies, increase the population. It would then be those babies who would splinter off and migrate further, and repeat the process. I would think it generous to concede a 20 mile migration per generation. And most certainly not the 8000 miles from Alaska to monte verde in anything less than 4000 years.-------------the math just doesn't add up. You should be asking yourself, did the "Clovis first" theory withstand the test of time. Anyway, we had our tete a tet(I rarely challenged professors in public). So, I went back to the stacks(what were then called the large books with current abstracts of articles and dissertations) and re-found the abstracts which I had just read in passing, got the reference librarian to order the articles and dissertations, then wrote a paper supporting my contentions--------(A+). I had an advantage. I was just a student scholar, with no responsibilities other than scholarship, While the professor had to do lesson plans, teach, grade homework and tests, serve on committees, etc.........etc.. Read above: Have I made any claims concerning the thread starter other than :"I found this today:" ? All of my claims were within my field of expertise, and only within my field of expertise. Take it for what it is, and not for what it is not.