Considering that Australia was settled upwards of 50K years ago by the aborigines, it's not too much of a stretch to consider that they also managed to make it here. The Americas were also likely visited by people from Asia and Europe across the northern ice flows.
Why did the Asians come to dominate? I was reading at one point that the Asians had a crucial innovation: the domestication of the dog. This gave them a big advantage versus some of the big nocturnal predators that inhabited the Americas at the time (an early warning at 3am that a sabertooth is around would make a big difference in your survival prospects)
ocassionally interrupted by world affecting catastrophic events.
= = = =
Have you come across any confirming sources about the
"galactic plain crossing" super catastrophe?
Some sort of intense gravitational area or some such that our solar system crosses through every XX,000 years with super devastating results almost wiping out all life on the planet . . .
Super solar flares and solar winds scorching earth; causing pole shifts; the equatorial 10 mile buldge snapping back to spherical with super devastating results of oceans sloshing around obliterating ALL coastal life for miles inland all around the planet; volcunism going berserk; winds over 200 mph; 1/3 atmosphere being blown away; . . .
Was a group of cross disciplinary scientists on C2C about it a week or so ago. Then another scientist . . . supposedly headed our way 2008-2020.
I wonder how this will play out with the Mormon church's contention that people from Jerusalem were also here a couple of thousand years ago. If the new idea is going to be that the Americas were a sort of Grand Central Station with the world's population coming and going down through the centuries perhaps the Book of Mormon won't be seen as so far fetched. Good news for Romney, I guess.