With 22 national parks and monuments to its name, Arizona boasts some of the most astonishing landscapes in the country, from the Grand Canyon to the towering buttes of Monument ...

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...

Projectiles flying faster than bullets from a blast 130 times bigger than the global nuclear stockpile helped form giant lunar canyons, according to a new study.

Scientists say America is no longer the only place with a Grand Canyon as NASA spots two enormous chasms carved into the ...

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

The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.

If you've already seen the Grand Canyon, make your way to this North American canyon that's even bigger (and that actually ...

PHOENIX (AP) — Tyon Grant-Foster and Makaih Williams scored 16 points apiece as Grand Canyon beat Utah Valley 75-57 on Saturday night.

A trip to Grand Teton National Park can be a wonderful experience for visitors of all ages, but it's important to take certain safety precautions. For instance, hiking is one of the main ...

GRAND CANYON NATIONAL PARK, AZ (AZFamily) — People can once again enjoy a hike at Arizona’s world-famous natural wonder. The National Park Service said on Wednesday evening that inner canyon ...

Trails in Grand Canyon National Park were closed due to a chlorine gas leak. Chlorine is used as a disinfectant in the Roaring Springs area of the park. The trails have since reopened NORTH RIM ...

GRAND CANYON, AZ — Three trails at the Grand Canyon are closed until further notice. Grand Canyon National Park announced on Facebook that the Bright Angel Trail, the South Kaibab Trail ...