USGS has unveiled its most detailed national geologic map, giving the public a free, interactive way to explore underground features. Here’s how to use it.

Situated between Navajo and Hopi tribal lands, this stunning canyon offers a mix of colorful hoodoos, remote trails, and ...

Groundwater extraction has caused parts of the Willcox Basin to subside by up to 12 feet since the 1950s. New research reveals that some areas sunk by 3 feet in just 4 years.