Grand Canyon was first seen by Europeans in 1540, García López de Cárdenas from Spain. The first scientific expedition to the canyon was led by U.S. Major John Wesley Powell in the late 1870s. Powell pointed to the sedimentary rocks exposed in the cliff as "leaves in a great story book." However, long before that time, this area has been inhabited by Native Americans to build a residence in the walls of this chasm.
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