Interior Department officials are considering scaling back the boundaries of national monuments in the West to encourage ...

The designation of Organ Mountains-Desert Peaks has resulted in a $234 million economic impact over the last decade, ...

Geoscientists have discovered a magma cap at Yellowstone National Park that is likely playing a critical role in preventing a ...

For the first time, geoscientists detected the top of Yellowstone’s magma reservoir. It is active and dynamic, but not in ...

Beneath the vast Arizona sky, the Secret Pass Jeep Trail unveils a breathtaking journey into the heart of history and nature.

Find out where your neighborhood ranks using The Arizona Republic/azcentral.com homicide ... look at homicides in the Valley. The homicide map is meant to provide a fuller picture of deadly ...