Federal scientists are launching an ambitious mapping project to hunt for what could be a mother lode of rare earth elements ...

Low-level airplane flights begin as soon as late July over the Black Hills and Bear Lodge areas of Wyoming and South Dakota to image geology using airborne geophysical technology.

CHEYENNE, Wyo. (AP) -- A blizzard shut down major highways Monday in Wyoming and South Dakota, and meteorologists said one mountainous area might get as much as 40 inches of ...

Blizzards rolled into parts of Wyoming and South Dakota on Friday, bringing the snow-savvy states to an unseasonably early winter standstill and causing the central U.S. and Southeast to tense for ...