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 ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

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 ...