geneman,

Though painful, a good response. That's kind of what I was looking for in terms of explanation. It kind of reinforces my overall personal theory that as group, we become a product of our environment, as our bodies will adapt to operate under certain conditions. And, over long periods of time, we will physically evolve, and a genetic marker, if ever indentifiable, will indicate that not only what that particular person/group may be capable of physically, but also provide an indication of historical existance, ie. where they came from.