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Theodore Roosevelt National Park
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The Little Missouri River has carved the badlands over the last 600,000 years.  

Did You Know?
The Little Missouri River began to carve the badlands about 600,000 years ago during the Pleistocene Epoch. The river formerly ran to Hudson Bay, but the glaciers diverted it into the Missouri River.
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Last Updated: June 07, 2009 at 12:40 EST