[wildbill]

HAs anyone ever come up with a theory as to why human beings appeared on continents like Asia and Africa way back—but nowhere in either S. America or N. America is there evidence of humans until migrations occurred in relatively recent times ,viz 10-12,000 years ago?

Much of N. America is ecologically and climatologically friendly to human species for example, but no human evolution from the primordial slime?

Nor, for the religiously inclined, was God involved in seeding humans into the Americas, presumably for lack of interest.

[blam]

"HAs anyone ever come up with a theory as to why human beings appeared on continents like Asia and Africa way back—but nowhere in either S. America or N. America is there evidence of humans until migrations occurred in relatively recent times ,viz 10-12,000 years ago?"

Many reputations have been destroyed challenging the 'Clovis Theory'.

Calico: A 200,000-year Old Site In The Americas?

Alleged 40,000-Year-Old Human Footprints In Mexico Much, Much Older Than Thought