Around two dozen states regularly elected both a Republican and a Democrat to the U.S. Senate in the 1970s and 1980s. Only ...

Breathtaking landscapes, panoramic views stretching into the horizon and free-roaming wildlife: the United States’ scenic ...

A map has been released showing the areas most likely to be targeted in the event of a nuclear attack on US soil, ...

Geologic mapping has been one of the most fundamental mandates of the U.S. Geological Survey (USGS) since its establishment ...

After the Civil War, thousands of Americans poured into the Great Plains on a collision course with western Indian tribes.

Greater sage grouse once numbered in the millions across all or portions of 11 Western states. Populations have dropped 65% ...