Conclusions from DNA evidence change over time, as more data rolls in from various ancient sources, and existing populations. Fascinating prehistory here!

There have fringe publications for some time now that discuss the surprising discoveries of copper tools found in places like Wisconsin. I've seen some articles claiming that ancient copper trade routes existed for export to faraway places. Who knows?

Before 1492, Venetian glass beads were being traded into Alaska. Sporadically.

But the raw-copper tools seem to be from copper deposits in north america.