A new report shows tens of thousands of abandoned mines dot the U.S., including parts of the Mountain West. Experts say these sites pose pollution threats due to being in areas that are at high risk ...

Tucked away and almost forgotten, we stumbled on a hidden tunnel that led straight into an abandoned soapstone mine. In this video, we take you with us as we squeeze through the entrance, explore the ...

Critics of a proposed lithium mine near the Salton Sea entered round two of a fight to force stricter environmental review of the project.

If you've ever taken a drive through Tujunga and noticed the golden hills above, you may have noticed a small, weathered ...