Scientists discuss their research that suggests the Grand Canyon first began to form 17 million years ago. Other scientists take issue with this research. Aired Mar. 07, 2008 [15:17]

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cave clouds, isotope dating, mammillaries, uranium-lead isotope dating techniques, grand canyon, how old is the grand canyon?, science friday, age of grand canyon, formation of grand canyon

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Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)

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