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      a deep, narrow valley with steep sides that may have a stream flowing through it


NASA Earth scientists study canyons and how they were made.

Our family went to the Grand Canyon in Arizona during summer vacation.

Related Links:
Grand Canyon in 3-D
The Grand Canyon of Mars


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Photo of the Grand Canyon
The Grand Canyon is one of the most studied landscapes in the world.
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Page Last Updated: July 16th, 2014
Page Editor: NASA Education