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 ...

In the afternoon, while his crew set up camp for the night, Powell would often climb into the canyon to investigate. Much has been learned about the geology of the Grand Canyon and about the ...

We’re on a cliff roughly 3,500 feet above the Colorado River at the tip of the Great Thumb Mesa, a spectacular formation that thrusts out from the South Rim of the Grand Canyon like the bow of ...

Since soon after our planet formed, Earth's 4.6 billion-year-long history was dominated by single-celled life. Something ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon of the Yellowstone is the primary attraction in the Canyon Village area ...

Business Insider's reporter could've spent an hour driving to the Grand Canyon. Instead, she took a two-hour train ride to ...

A variety of companies offer helicopter tours of the Grand Canyon, with many options departing from Grand Canyon National Park Airport (located in Tusayan) and most Las Vegas hotels. Read on to ...

I write on education policy, student basic needs, and financial aid. Grand Canyon University (GCU) is being fined $37.7 million after the Department of Education found that it lied to more than ...