You guys in Oz and the Old World have to understand that America has nothing for ancient history except the Clovis people. We do not have an ancient culture of aborigines or Egyptians or Neanderthals. So when this advanced culture's artifacts sprang out of the corn fields, it was important to us. Of course there had to be antecedents, but that family tree had no roots until this discovery.
I've read that some researchers think that artifacts of earlier cultures were inundated and lost when the ice sheets melted and sea levels rose. So finding evidence of an earlier culture than Clovis is a big deal.
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