Mysterious driftwood high in Grand Canyon caves hints at the legacy of Arizona’s huge impact crater.

A meteor may have led to the formation of the Grand Canyon, a new study has found. While many Americans are familiar with the Grand Canyon’s beauty and uniqueness, they may not be aware of the story ...

Walk out over the Grand Canyon to peer thousands of feet downward into the red cliffs, enjoying some of the most dramatic views in all of Arizona.

The Grand Canyon may seem to be a simple case of "river carves rock," but to geologists, its formation is still puzzling. Ira Flatow and guests... Solving The Riddle Of The Grand Canyon's Formation ...

Introducing the Grand Canyon / Stanley S. Beus, Michael Morales -- Precambrian crystalline core / R. S. Babcock -- Grand Canyon Supergroup : Unkar group / J. D. Hendricks, G. M. Stevenson -- Grand ...

A research team outlines how it identified and bestowed a moniker upon a previously unexplored 500 million-year-old Grand Canyon formation: The Frenchman Mountain Dolostone. The newly named rock layer ...

Editor’s note • This article is part of 150 Things To Do, a reporting project and newsletter exploring the best that Utah has to offer. Click here to sign up for the 150 Things weekly newsletter. Much ...

Anyone who enjoys whitewater rafting in places like the Colorado River owes a debt of gratitude to the enormous boulders that create the foaming undulation known as rapids, and new research appears to ...