Tucson's new ‘Astro Trail' is a collection of national parks, state parks, observatories, and planetariums, that offer a ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

The proposed Tusayan development would build a giant mega-resort that threatens groundwater just outside Grand Canyon ...

Large wildfires in the desert were once rare. Now experts worry that invasive plants and a changing fire cycle are putting ...

Arizona may not have any ocean-front property. But if you're looking for a beachy getaway, the Grand Canyon State still has you covered. Lake Havasu City is tucked along a bend of the Colorado River ...