What did archeologist learn from styding the graves and shelters at chaco canyon

By examining graves at Chaco Canyon, archaeologists found evidence of warfare, cannibalism and scalping.  and the evidence that shelters were built in protected places, possibly to defend themselves against their enemies

Explanation:

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★ By examining graves at Chaco Canyon, archaeologists found evidence of warfare, cannibalism and scalping. There was also evidence that shelters were built in protected places, possibly to defend themselves against enemies.

Explanation:

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it refers to race, i am pretty sure this was a popular term in nazi germany or something.