U.S. Senate candidate Rep. Ruben Gallego made the four-hour, eight-mile hike to the remote Havasupai reservation to hear ...

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 ...

On any given summer day, Grand Canyon National Park draws 17,000 to 18,000 visitors — roughly 500,000 to 600,000 people in a month, according to National Park Service visitation data ...

Arizona Governor Katie Hobbs is the latest elected official to call for an environmental review of Pinyon Plain uranium mine.

Recent photograph of Grand Canyon from Walhalla Plateau, with the red line showing the Great ... [+] Unconformity between the metamorphic Proterozoic basement complex and the Paleozoic sediment ...

Senate candidate Ruben Gallego’s 8-mile hike to Supai village is part of a broader push to court tribal voters.

The Democratic congressman, who is running for Senate in Arizona, hiked thousands of feet down to meet the Havasupai, a ...

The Grand Canyon was also selected as a UNESCO World Heritage Site. The canyon's eternal splendor is beyond description in any photo or written word. One of the most prominent instances of the global ...

The original environmental review was completed in 1986 and some opponents of the uranium mine say it should include new ...

The Great Unconformity: A Billion-Year Gap in Earth’s History In 1869, American geologist John Wesley Powell made a startling observation while exploring the Grand Canyon: a significant gap in ...

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 ...