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

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

Of course, when we think of hiking in Arizona, we often imagine hiking within the Grand Canyon National Park or ... it is advised to have a downloaded map just in case and allow enough time ...

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.

A small portion of identified uranium resources in the United States are found in the Grand Canyon mineral withdrawal area.