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

Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks ...

A federal judge rejected a challenge from some of Arizona's top Republicans to undo the designation of the Baaj Nwaavjo I’tah ...

In 1908, explorer G.E. Kincaid made a shocking discovery in the Grand Canyon: a man-made cavern with hundreds of carved steps ...

Rocky Mountaineer's "Journey Through the Clouds" is a luxurious way to enter Jasper National Park. Here's what it was like.

In a significant discovery, a team of scientists at the Lunar and Planetary Institute (LPI), an institute of the Universities ...

The gigantic cataclysm, which released energy 130 times more powerful than the detonation of the entire world’s atomic ...

The Colorado River is the main artery of the Southwest. Find out how drought and climate change are impacting the river's ...

Pinnacle Peak is located near the Troon North Golf Club and Four Seasons Resort Scottsdale (about 25 miles north of Old Town ...

Visit one of Wyoming's best trails to enjoy a breathtaking hike in the Great Outdoors with stunning views of mountains, ...