Hopewell in Ohio considered a ‘climax culture’
Scientists say a near-Earth comet may have caused its demise
The mound-builders were a mysterious culture. Some of the best thinkers of the 19th Century decided the earthworks created 2,000 years ago were too sophisticated to be any way connected to the Indians they knew at the time, an utterly defeated people who were struggling to simply exist as individuals let alone as a culture.
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