Researchers from Princeton University and the University of Arizona have created a simulation that maps underground water on a continental scale. The result of three years' work studying groundwater ...

The most famous American thru-hikes are the Appalachian Trail and the Pacific ... consider a less famous but still gorgeous option -- the Continental Divide National Scenic Trail.

The first of the three trails, the Appalachian ... Last, the Continental Divide Trail is the most remote and challenging of the three. The CDT follows the Rocky Mountains for roughly 3,100 miles ...