A new study suggests ancient wood floated into a cave far above the Colorado River when a meteorite-induced earthquake ...

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

What could possibly link a collision in space on the Arizona desert to a landslide that irreversibly altered the face of the ...

Based on remarkably similar ages, the meteor impact that created one of Arizona's most recognizable landmarks and wood and sediments found in caves high up in the walls of the Grand Canyon, a new ...

Is Arizona's most beautiful place an iconic red rock butte, a blue-green waterfall or an otherworldly cave formation? Vote in our stunning views poll.

Congressman Paul Gosar is demanding answers after a wildfire destroyed the Grand Canyon Lodge and more than 70 structures.

The rash of global heat waves across the Northern Hemisphere comes as average global temperatures continue to climb, driven by the burning of fossil fuels. Last year was the hottest year in recorded ...

In general, Americans’ views of immigration policies have shifted dramatically in the last year, the Gallup polling shows — ...

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

The Dragon Bravo Fire that destroyed the North Rim lodge will affect visitors and nearby communities. Here's the Canyon's financial impact on Arizona.

The lodge opened in 1937 and was the only hotel inside the national park's boundaries on the North Rim. It was a National Historic Landmark.

The Grand Canyon Lodge, which burned in the Dragon Bravo Fire over the weekend of July 12-13, was on the North Rim of the ...