Paleontologists unearthed fossils in the Grand Canyon dating back more than 500 million years that offer a new look into a ...

Rocks gathered along the Colorado River contained evidence of a bustling community of animals in an ancient sea.

A treasure trove of exceptionally preserved early animals from more than half a billion years ago has been discovered in the ...

Paleontologists named the worm Kraytdraco spectatus, for its resemblance to a Star Wars monster. They say it sheds light on ...

Recently unearthed fossils from the Cambrian period shed light on a key stage of evolution, when life became much more ...

In a surprising twist, two of Arizona’s most iconic landmarks—Meteor Crater and the Grand Canyon—may be linked by a cosmic ...

Learn how the Grand Canyon used to be home to an ancient evolutionary competition that has since left behind a plethora of ...

The use of Rose Canyon Lake north of Tucson will be limited until 2025, the Coronado National Forest Service announced this week.