Courtesy Grand Canyon Scenic Airlines The first thing some people do when visiting Las Vegas is immediately leave it—and go ...

They were looking at deep time. The rocks in the Grand Canyon span from 270 million to 1.8 billion years old, a stunning backdrop against which human existence is but a mere blip.

The Grand Canyon is the biggest canyon on earth: 277 miles long, 10 miles wide, and a mile deep. It contains some of the oldest exposed rock on earth, Precambrian Vishnu schist, formed 1.7 billion ...

This river canyon, measuring 278 miles long, roughly 10 miles wide, and in places more than a mile deep, is unlike anything else in the country. Artists paint pictures of it. Musicians write songs ...

Spreading wildfires forced the evacuation on Friday of part of the famed Grand Canyon, with the US National Park Service ...

They were looking at deep time. The rocks in the Grand Canyon span from 270 million to 1.8 billion years old, a stunning backdrop against which human existence is but a mere blip.

They were looking at deep time. The rocks in the Grand Canyon span from 270 million to 1.8 billion years old, a stunning backdrop against which human existence is but a mere blip.

Start the day smarter. Get all the news you need in your inbox each morning. They were looking at deep time. The rocks in the Grand Canyon span from 270 million to 1.8 billion years old, a ...

As the sun dipped low to the southwest of the Grand Canyon, tourists flocked to the rim. They lined up to catch the shuttle to Hopi Point, and gathered in the hundreds by the visitor center ...