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One of North America's densest collections of Indigenous mounds is at risk. What it means.
One of North America's densest collections of Indigenous mounds is at risk. What it means.
It's a product of climate change, which is causing wetter conditions across the upper Midwest, and manmade change to the river, altering its flow.
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One of North America's densest collections of Indigenous mounds is at risk. What it means.