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

Now, scientists believe that they have figured it out. Two huge canyons scored into the surface of the Moon were created in ...

Williams, Arizona, the southern terminus of the Grand Canyon Railway, offers inns, hotels, restaurants and gift shops for souvenir-seekers, as well as annual winter and fall celebrations.

Ryan Crow of the U.S. Geological Survey (USGS) gave a talk to a packed crowd at the Museum of Northern Arizona Jan. 12 ...

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

Everyone knows Arizona is nicknamed the Grand Canyon State. But did you know it's also been called the Baby State or the Sweetheart State at various points in history? Arizona didn't have an ...