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

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 ...

Rare fossils found along the Colorado River 'give us a fuller picture of what life was like during the Cambrian period,' says ...

New research suggests that the Grand Canyon was mostly formed only 5 or 6 million years ago, much more recently than previously suspected. A new study published in Nature Geoscience concludes that ...

(CNN) — About 3.8 billion years ago, two massive canyons likely formed on the moon in a span of less than 10 minutes, according to new research. The extraordinary formations, each comparable in size ...

WASHINGTON -- Gazing into the majestic Grand Canyon, awe-struck visitors inevitably ask: ''How old is it?'' Far older than generally thought, says new evidence that scientists culled from caves lining ...

WASHINGTON (Reuters) - The Grand Canyon, carved out over the eons by rushing river water, began to form 17 million years ago, making it nearly three times older than previously thought, scientists ...