https://docdro.id/SQ5B74V
"One of the surprises was the discovery of gas bubbles in a copper spear head/point from the Osceola site. This porosity was identical casting bubbles found in some of OMC's cast aluminum engine blocks."
"Unlike other copper points, which show a hammer-only mode of...
So I've read this comparison on another website:smile::
>europeans
>from aurignacian proto-gravettian to solutrean:10000 years (30000BC-20000BC)
>from aurignacian-antelian to start of crop development: 9000 years(30000BC-21000BC)
>from start of crop development to neolithic revolution: 10500...
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