The 8000 year old Settlements found in Middle-east and South-Asia come under the category of Proto-Civilisations. This was the time the transistion from tribal to urban culture was taking place. The Indus-Sarasvati civilisation came to an end because of Ecological destruction
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25000-35000 B.C. Time of paleo-Indian migration to Americas from
Siberia, according to genetic evidence. Groups likely traveled across
the Pacific in boats.
Wheat and barle
