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

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

Researchers have found a link between two geological events in iconic locations of the U.S. Southwest that scientists ...

Flood warnings have been issued for Kansas and Missouri as Tomahawk and Brush Creeks rise in water levels. This live blog is ...

The nearly century-old Grand Canyon Lodge in far northern Arizona was a refuge for ambitious hikers and adventurous tourists eager to bask in the magnificent views ...

Nearly 5 million people visited the Grand Canyon last year, from day trippers and campers to people sleeping overnight in ...

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 National Park has launched a satellite-based emergency alert system, which allows visitors to receive real-time alerts about flash flooding and other hazardous events in cell service ...

An extreme heat warning has been issued for parts of Arizona, including the Grand Canyon, on Monday.

Thousands of hikers take on the Grand Canyon’s Rim-to-Rim trek every summer. This year, however, a major trail closure has some experts raising serious safety concerns.