As the Arizona Trail winds past the proposed Oak Flat copper mine, the search for climate solutions takes on new meaning.

Arizona has a decades-long unchallenged reputation as a copper state, but a recent ranking suggests more mineral wealth is hiding beneath its deserts. The study, published by Bullion dealer SD Bullion ...

The U.S. Geological Survey has transformed how the nation understands its mineral wealth. The agency's 2025 assessment reveals $2.55 trillion in identified and undiscovered gold deposits beneath ...

Travelers — many inspired by Jacob Waltz — headed to Arizona in search of gold. The Superstition Mountains loom in the background of a historical marker honoring their route. (Joe Duhownik/Courthouse ...