A massive and rather cunning bison kill carried out some 2,500 years ago among the sand dunes of southern Alberta left behind a wealth of artifacts that are offering new insights into a poorly-understood culture of the ancient Northern Plains.
In addition to the scattered remains of at least 65 bison, archaeologists have found more than a hundred stone points, most of them fashioned from a type of rock found only in North Dakota, a thousand kilometers away.
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