The Grand Canyon's North Rim sees just 500,000 visitors a year. The canyon boasts about 91 species of mammals, 447 species of birds, 58 species of reptiles and 18 species of fish (five of them ...
The region where the Grand Canyon now lies begins to shift and rise ... Fossils found in these layers include fern-like leaves, tracks left by reptiles, and numerous forms of marine life.
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