In 1908, explorer G.E. Kincaid made a shocking discovery in the Grand Canyon: a man-made cavern with hundreds of carved steps ...

Two gargantuan canyons on the moon were carved by a hailstorm of rocks — and that’s good news for future lunar astronauts.

Something unusual is happening in the Grand Canyon—its animals are behaving in ways never seen before. From unusual ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.

A midair collision at the Grand Canyon killed over 100. The disaster partially led to the start of the FAA and changed air ...

The man who led a landmark attempt to navigate the entire length of the Grand Canyon did not exactly look ... This is the mystery of risk: What makes some humans willing to jeopardize so much ...

On March 31, Diana Zacarías, a 22-year-old from Natchitoche, Louisiana, arrived in Arizona to make a dream come true: visit the Grand Canyon. From the very beginning, it seemed an adventure that ...

A federal judge says Arizona lawmakers and others lacked standing to sue the Biden administration over its creation of a new ...

The Mystery of Chaco Canyon is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku ...