When you buy through links on our articles, Future and its syndication partners may earn a commission. A massive landslide in the Grand Canyon 56,000 years ago blocked the Colorado River. | Credit: ...

A new study suggests ancient wood floated into a cave far above the Colorado River when a meteorite-induced earthquake triggered a landslide, a dam, and an ancient lake. Reading time 3 minutes ...

For 16 years, visitors could sleep in a suite inside a giant cave near the Grand Canyon. Now, it's being dismantled.

A new study highlights the striking coincidence in the geologic ages of the famous Meteor Crater in Arizona and a landslide dam that blocked the Colorado River, forming a paleolake in the Grand Canyon ...

A historic cavern 210 feet below ground along historic Route 66 in northwestern Arizona has finally reopened for tours. Grand Canyon Caverns, in Peach Springs near the Hualapai Indian Reservation, ...

This piece is part of a special project on deep time examining what the Western U.S. was like thousands, millions and even billions of years ago, and how that history is still visible and ...