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Stories from around the region that engage and inspire.A special thank you to the City of Flagstaff BBB grant program and Flagstaff Cultural Partners for awarding KNAU $18,400 to help fund KNAU's Science and Technology Desk.

Carving Grand Canyon: New Theories About An Old Canyon

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Flagstaff geologist Wayne Ranney discusses some new theories of how - and when - the Grand Canyon formed. The second edition of Ranney's book, Carving Grand Canyon, was recently released.

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