The Cambrian-age Tonto Group is a set of rocks famous for holding clues to the burst of new life that reshaped Earth 500 ...

Hells Canyon might be deeper than the Grand Canyon, but it's barely 2 million years old, according to a new study.

Where Oregon's high-desert-like arid landscape meets the dark skies, there's a new, laid-back state park that rivals Arizona's Grand Canyon.

Controversy has erupted after federal officials at the Bureau of Reclamation announced they do not plan to release ...

Hells Canyon is the deepest river canyon in the United States. Now scientists have solved the mystery of when it formed.

Federal officials have confirmed that they will not flood the Grand ... around the West. In 2021, for instance, the government declined to flood the canyon to prop up Lake Powell’s water level.

With such ancient history, there are tales and myths to be told as we walked through the swirling sculpted corridors ...

On a scorching day in June 2013, the Grand Canyon discouraged hikers from making a long trek to the bottom because there would be no potable water ... a few times a year. Around when Cockrum ...

The U.S. Supreme Court on Monday rebuffed a bid by mining interests to overturn a 20-year ban on extracting uranium from about a million acres around Grand ... and deep aquifers,” as water ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon ... The canyon is anywhere from 800 to 1,200 feet deep and features ...

Hells Canyon, which is on the border between Oregon and Idaho, is almost 8,000 feet deep ... and melting glaciers around this lake would have resulted in a lot more water heading into it, explains ...