Re: Afro-Asiatic

[John]:

> In the last 90,000 years there have been three human
> movements out of Africa
>
> 60-80,000 BCE - the movement that took Australians and Indo Pacifics to
> South East Asia and Australia
>
> 30-40,000 BCE - the movement that took Aurignacian Homo Sapiens
> (Cro-Magnon's) from North East Africa, through Palestine to the
> Eurasian Steppes (the probable origin of Dene Caucasian)
>
> 15-8,500 BCE - the movement that took the microlithic-mesolithic
> cultures from North Africa to the Eurasian forests (the probable origin
> of Nostratic)
>
> In this time there was no movements from the Middle East back into
> Africa - that only came later with the neolithic revolution in the
> Middle East.

Looks good, John, however 2 question arise:

1. What about Amerinds (all native Americans but Na-Dene Indians and
Eskimo-Aleuts)?

2. We need to explain such a pattern: 10-20,000 y. periods of migrations
with gaps of 15-20,000 years. Something VERY importand had to happen to
provoke every next wave of migrations. It seems to me that it could be both
climatic changes and technological/cultural inventions. Do you have such
explanations?

Alexander