Cameron Trading Post and The Grand Canyon East Rim The Grand Canyon is on most Arizona itineraries. Obviously, it’s because ...

Two gargantuan canyons on the moon were carved by a hailstorm of rocks — and that’s good news for future lunar astronauts.

While a visit to the Grand Canyon is mesmerizing and worthwhile, it's not necessarily easy. We consider the closest and most ...

A new study explains how two deep canyons formed very quickly on the moon during an asteroid impact. KNAU’s Melissa Sevigny ...