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Mississippi National River and Recreation AreaThe historic Stone Arch Bridge across the Mississippi River.
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Mississippi National River and Recreation Area
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Mussels, One being in a person's hand  

Did You Know?
Under the right conditions, certain freshwater mussel species live for as many as 10 to 100 years. This lifespan is one of the longest for any creature on earth.

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Last Updated: March 28, 2008 at 08:27 EST