The far side of the Moon has its own versions of the Grand Canyon—two of them, in fact! A new study explains how these deep ...

The daredevil skydiver believes his stunt will revolutionize and offer a safer alternative to wingsuit flying.

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 ...

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

German skydiver Max Manow pulled off an 'endless skydive,' becoming the first person to hook onto a plane midair over the Grand Canyon.

Rraft through challenging whitewater rapids or hike along awe-inspiring cliffs with incredible views at this under-the-radar ...

Scientists proposed an explanation for the formation of Vallis Schrödinger and Vallis Planck near the lunar south pole, which ...