TUCSON, Ariz. — Do you know all the animals that represent the Grand Canyon State? If not, the results may surprise even the most experienced Arizonan. Here are five desert critters who hold a ...

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UNLV geology professor Steve Rowland estimates the footprints are 313 million years old, among the earliest found at the Grand Canyon.

The Grand Canyon’s fish and other aquatic creatures are contaminated with toxic levels of the two metals. Power plants and mines are major sources of mercury while selenium is carried into the ...

Embark on an unforgettable 5-day trek through the breathtaking depths of the Grand Canyon—a journey through time, silence, and raw desert beauty. From sun-scorched cliffs to cool river bends ...