This surprising connection between Arizona's world-renowned geological features stretches back 56,000 years, to when a ...

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 ...

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

On his first trip to the Grand Canyon Star Party, Dave Eicher joins thousands for a week of lectures, observing, and cosmic wonder.

Grand Canyon Caverns and restaurant have opened after being closed for nearly 3 years. Here's why it closed and how to go into the Grand Canyon caves.

To behold the Grand Canyon from above, visitors usually book a helicopter tour or ride a zip line. But at the west rim of the canyon, there’s a third (and equally adrenaline-inducing) option ...

The caverns sit atop the Grand Canyon Inn between Peach Springs and Seligman and are a worldwide tourist attraction.

An unusually high number of hikers had to be rescued by helicopter on the Grand Canyon, and a construction site is to blame.

North America's deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new addition to the Earth's ancient landscape. A recent study suggests that a ...

Hells Canyon might be deeper than the Grand Canyon, but it's barely 2 million years old, according to a new study.

Beloved Washington doctor, Dr. Dennis Smith, died during a Grand Canyon hike. Known for his fitness and orthopedic work, his death may have been a freak accident, a colleague said.