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Meet Iowa’s 400,000 Year Old Living Fossil

Meet Iowa's 400,000 Year Old Living Fossil

Hello, Iowa Pleistocene snail.Photo: USGS Northeastern Iowa holds a 400,000 year old time capsule. Rather than vast, flat prairies, this region boasts a rolling landscape of bluffs and ravines spared by the earth-tamping force of the last Ice Age’s glaciers. And nestled in the leaf litter on rubble piles beside …

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