ARIZONA

Locked within the stones and fossils of Petrified Forest National Park lies a record of life, death, and resilience during one of Earth's most extreme periods of environmental change. What secrets do these fossilized ecosystems reveal about the prehistoric past, and how can they help ...

Antelope Canyon might be the most visited and photographed slot canyon in the world, but there is more to this ancient sandstone structure than meets the eye. Formed millions of years ago, and revered as a spiritual site for the Navajo Nation, the origins of ...