In recent weeks, you've likely heard a lot about rare-earth substances with hard-to-pronounce names, but experts warn that ...

Elected 12 times to Congress, Grijalva was a fixture of Tucson politics and a standard-bearer of progressive Democrats.

An Upper Peninsula underground mine that employs 475 people is looking to expand its hunt for valuable minerals through an ...

Coal from the mine is shipped by rail to power plants in Arizona, Michigan, Minnesota and Washington, as well as ...

A big new mining project is coming together near Patagonia—-promising well-paying jobs, while environmentalists worry about ...