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Each summer, the National Center for Science Education organizes a boat trip down the Colorado River through the Grand Canyon to bring visitors face to wall-face with striking examples of geologic and evolutionary processes.
Learn more about your ad choices. Visit megaphone.fm/adchoices
By Scientific American4
8282 ratings
Each summer, the National Center for Science Education organizes a boat trip down the Colorado River through the Grand Canyon to bring visitors face to wall-face with striking examples of geologic and evolutionary processes.
Learn more about your ad choices. Visit megaphone.fm/adchoices

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