Arizona's magnificent Grand Canyon is painstaking result of the Colorado River's current wearing away the planet's surface ...

The vast valleys of Vallis Schrödinger and Vallis Planck demonstrate the incredible forces that shaped the face of the Moon.

After hours: February 7 at 4:13:10 PM EST ...

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

Our Moon continues to surprise us with amazing features. Scientists recently shared new information about two canyons that ...

The extraordinary formations, each comparable in size to Earth’s Grand Canyon, are hidden on the far side of the moon — the side that always faces away from Earth — near the lunar south pole ...

With the rise in automobile use, the trains lost business, and the last passenger train pulled into the Grand Canyon Depot in 1968. After an extensive restoration, the Grand Canyon Railway was ...

A region north of the Grand Canyon is riddled with mysterious spots and the expert came up with the most probable cause of it ...

To get there, you’ll have to hike a vertical mile into the depths of the Grand Canyon. This sought-after campground fills up quickly, so plan ahead and get your permit early. A few walk-in permits may ...

Grand Canyon adventure travelers will have one less option for planning activities. REI Co-op announced on Jan. 8 that it will close its Experiences business after 40 years to focus on its retail ...