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

The Colorado River, which carved the Grand Canyon over millions of years, is now in crisis from climate change and overuse.

It was the worst plane crash in U.S. history at the time -- two passenger planes collided over the Grand Canyon. Now a historical marker reminds visitors that the crash changed commercial aviation.

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

Digs in Egypt's City of the Dead have unearthed a hoard of ancient artefacts, including amulets, canopic vases and 16 tombs containing approximately 20 coffins and sarcophagi between them. Amongst ...