A national park in southwest Colorado partially reopened Wednesday for the first time since a fire broke out earlier this ...

The collision of a meteorite in what is now Arizona left an indelible mark: Meteor Crater. At nearly the same time, a massive landslide blocked the Colorado River, creating a temporary lake in ...

Rocks gathered along the Colorado River contained evidence of a bustling community of animals in an ancient sea.

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

Two wildfires burning in the western United States — including one that has become a “megafire” on the North Rim of the Grand Canyon — are so hot that they’re spurring the formation of “fire clouds” ...

No Ancient Egyptian artifacts have ever been found in the Grand Canyon. Archaeological findings and indigenous accounts thoroughly document the cultures that lived in the Grand Canyon area. The ...

The South Rim Fire at Black Canyon of the Gunnison National Park continues to burn weeks after it started from lightning ...

A wildfire that destroyed a historic Grand Canyon lodge is continuing to spread out of control after it had been allowed to ...

“The North Rim of the Grand Canyon is like another world,” said Ethan Aumack, executive director of the Grand Canyon Trust, ...

The U.S. Bureau of Reclamation should start planning to modify the Glen Canyon Dam, which plugs the Colorado to form Lake ...

Grand Canyon National Park Superintendent Ed Keeble said the Grand Canyon Lodge, the only lodging at the North Rim, was consumed by the flames.

Researchers led by a team at the University of New Mexico suggest that a large meteor triggered a massive landslide in the ...