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

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

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

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

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 ...

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” ...

The national parks of the West are a treasure, and once you are immersed in all their massive grandeur, it’s easy to assume ...

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

A meteor may have led to the formation of the Grand Canyon, new study says - The study dives into questions surrounding how and when driftwood in Stanton’s Cave in the Grand Canyon got there ...

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

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