A massive landslide would have dammed the Colorado River, forming a deep lake that has since dried up. A meteorite impact ...

Evidence comes from decades of investigative work involving driftwood and lake sediments found in caves high above the river ...

A new study has revealed the formation of the Grand Canyon may be tied to the creation of another Arizona landmark.

The Grand Canyon, one of the most iconic geological formations on Earth, may hold deeper secrets about our planet’s history ...

Researchers have found a link between two geological events in iconic locations of the U.S. Southwest that scientists previously didn't think had anything to do with each other.

A massive wildfire in northern Arizona has grown by thousands of acres over the weekend, as firefighters work to regain ...

New research links the impact at Meteor Crater to a Grand Canyon landslide that may have created an ancient lake 56,000 years ...

A remarkable coincidence occurred 56,000 years ago, when the impact that created Meteor Crater triggered both a landslide-dammed lake and a paleolake formation in the Grand Canyon. Earth’s ancient ...

Monsoon season in northern Arizona can be a welcome respite from early-summer heat. But the intense thunderstorms can also produce flash flooding, sending water and debris coursing rapidly down previo ...

Abnormally dry, hot conditions near the Grand Canyon's North Rim allowed the Dragon Bravo Fire to grow rapidly.

Geology is full of detective stories about Earth’s history, and a new paper in Geology by University of New Mexico ...

A fast-moving wildfire destroyed 50 to 80 structures on the Grand Canyon’s North Rim, including the historic Grand Canyon ...