[Mr Ramsbotham]

If people with Australasian ancestry somehow entered the Americas before the early American Indians, how did they get into Brazil without leaving any trace in North America, either genetically or archaeologically?

Well, that's easy. Since so much water was tied up in North American ice, it exposed large areas of the Pacific and they island-hopped in their dugout canoes.

[rktman]

I’m thinkin’ ancient jet skis.