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

Eyewitness video from Friday (July 11) shows thick smoke columns billowing from the White Sage Fire spreading across the North Rim of Arizona's Grand Canyon.

GENEVA — Rescuers hail a furry Chihuahua as a "four-legged hero" after its pacing atop an Alpine rock helped a helicopter ...

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

For the second night in a row, San Francisco Giants utility man Casey Schmitt came through with a grand slam against the rival Los Angeles Dodgers.

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 ...

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.

Scientists have figured out how extinct giant ground sloths got so big and where it all went wrong by Jerald Pinson, Florida Museum of Natural History ...

This one-day itinerary includes the best of Grand Canyon's South Rim, including El Tovar, Mather Point, Bright Angel Trail and Desert View Watchtower.

A 74-year-old man from Washington state died during a hike in the Grand Canyon, authorities said.

Hikers and experts are concerned that the Grand Canyon could experience a deadly summer with the closure of the main rim-to-rim trail.