Newly published research results suggest some sort of major airburst occurred in the right time and place(s) to have initiated or aggravated the decline of the Hopewell mound builder culture.
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Etowah Indian Mounds & Megalithic Culture
I was checking out a site about our local indian mounds
http://ngeorgia.com/parks/etowah.html
And I got to thinking about the similarity of the mounds and formations here in the Eastern USA and European megalitic culture sites. Does anybody think...
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