A rock on Mars that may hold clues about ancient microbial life on the Red Planet continues to puzzle scientists.

Beneath the waters of Chesapeake Bay lies a massive secret that took decades to uncover. What once seemed like a normal ...

The Trump administration plans to shutter two National Park Service offices in Flagstaff later this year as part of ...

Arizona boasts stunning natural wonders, including the Grand Canyon, Meteor Crater and Canyon de Chelly National Monument. The state is home to vibrant cities like Phoenix and Tucson, known for ...

Spring break is here. These are some of the most popular travel destinations, including northern Arizona, San Diego, ...

His short trip was packed with adventure. "We visited Mosaic Canyon, Badwater Basin Salt Flats, Natural Bridge Canyon, Gower—Gulch Loop, Mesquite Flat Sand Dunes, Artists Palette, Ubehebe and Little ...

The Red Planet and its tiny moon Deimos were recorded at a very near distance as the asteroid-chasing spacecraft completed a flyby on Wednesday.

Discover America's most scenic roads with the top national park drives. Our guide features eight stunning scenic routes with ...

A volcano in Alaska is showing new signs of unrest. Experts say the likelihood of an eruption in the next few weeks or months has increased.

Spend a day in nature at Walnut Canyon, Wupatki and Sunset Crater National Monuments. If you're feeling more adventurous, bring your headlamp and jacket to hike into the Lava River Cave.