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 to ...

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 ...

New research suggests two canyons eventually joined.

Long ago, the Grand Canyon wasn’t a land of plunging ravines and gaping gullies, but the site of towering mountains, not dissimilar to South America’s Andes of today. They are known as the Vishnu ...

Visitors to the Grand Canyon always want to know: How old is it? Park rangers are instructed to tell them the canyon has been carved by the Colorado River for the past 5 million or 6 million years.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. About 3.8 billion ...