A new study revealed that the Native American population was wiped out by genocide that took place circa 800 A.

Jason Chuipka and James Potter said that the massacre occurred as a result of conflict between different Anasazi Ancestral Puebloan ethnic groups.
"It was entirely an inside job," Discovery News quoted Chuipka at Woods Canyon Archaeological Consultants, as saying.
The remains indicate that men, women and children were tortured, disembowelled, killed and often hacked to bits - with their heads, hands and feet removed as trophies for the killers.
"I think that the major event was preceded by social stress within the community that may have been exacerbated by a period of drought," Chuipka said.
"The scale of the mutilations suggests that it was planned and organized in the preceding days or weeks, and that the violence took place in a relatively short period of time-a few days," he said.
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The paper will be published in the Journal of Anthropological Archaeology.
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