Bill wrote:
As far as the spread of humans throughout the Americas, that seems to have been fairly quick. It apparently took at the most a few thousand years for humans to reach the tip of South America. This can happen if a well adapted species invades a new locality.
Certainly it can! Just look at the Cane Toads!!!
Forgive my flippant comment!
Thanks for the answers to my other questions. I found them really interesting, especially the idea of parallel existences of the various varieties of humans. They really were quick to spread through to South America.
It is interesting that despite the development of so many varieties of human elsewhere, there is no evidence of their being in the Americas, although there is evidence for a wide variety of other species, in the pre-human eras. I wonder why?
