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How can trading be ruled out, i mean it only needs one small group to manufacture, they could trade, then others copy, i guess an essential and successful tool would be to them as electricity is to us.
Edit.
In other words the people were all ready there and the tool spread to them.
The Fluted Clovis point spearhead used to hunt mammoths appears all over North America. Clovis man has been found in the Peace River, British Columbia, Nova Scotia, Washington, and Mexico. This unprecedented form of stone point has the conservatives puzzled, as it requires a very rapid spreading to fit their hypothesis. Conservatives suggest the Clovis Point likely only dates to 11,500 B.C. Another problem with this technology is that few Clovis points are discovered in Alaska and no Clovis points in Siberia except those dated 6,300 B.C. at Uptar which suggests an American to Asia migration. All evidence supports a south to north migration of this technology. The Clovis technology may have migrated from America to Asia. Many conservative scientists resort to science fiction type theories to explain these and other anomalies.
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