It is estimated that up to 20,000 effigyemounds were created just in Wisconsin

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4 February, 03:29

It is estimated that up to 20,000 effigyemounds were created just in Wisconsin

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It is estimated that up to 20,000 effigy mounds were created just in Wisconsin. True (It is estimated that up to 20,000 effigy mounds were created just in Wisconsin!) The Nazca Lines were created by removing the top layer of reddish pebbles to show a whiter ground beneath.