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Stories by Roy B. Van Arsdale and Randel T. Cox

  • January 2007 | Evolution The Mississippi's Curious Origins

    The Mississippi's Curious Origins

    A mountain range once separated the continental interior of the U.S. from the Gulf of Mexico. Some clever geologic sleuthing has revealed how that barrier was breached, allowing the river to reach the Gulf

    January 1, 2007 |

Scientific American Dinosaurs

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