Tucked away in a remote bonebed in Arizona's Petrified Forest National Park laid hundreds of fossils, including a fragile jawbone belonging to one of the oldest-known flying reptiles: the pterosaur.

Arizona is home to more than three dozen national parks, sites and monuments. These 10 easy to moderate hikes show off the ...

Arizona has 24 national parks and monuments. Here are the 12 must-see national parks and monuments in Arizona and how to visit each of them.

Researchers found North America’s oldest known pterosaur. Arizona’s Petrified Forest National Park has done it again. The famed fossil-rich ground has provided paleontologists a remarkable finding, ...

Mark Kelly and Ruben Gallego, both Democrats, on Tuesday introduced legislation to designate Chiricahua National Monument in ...

Forward [sic] / William G. Parker, David D. Gillette, and Randall B. Irmis -- Dedication to Sidney R. Ash, Ph.D. / David D. Gillette and William G. Parker -- On the shoulders of giants : influential ...

In an earlier Ask a Ranger column, I wrote about the topic of geoheritage sites — places of special cultural, scientific, educational or aesthetic value — and what makes those places important to ...

Plan your adventure to Arizona’s most beautiful natural wonders, where unforgettable landscapes feel almost unreal.

The newly described pterosaur Eotephradactylus mcintireae is seen eating an ancient ray-finned fish alongside an early species of turtle and an early frog species, with the skeleton of an armored ...

Volunteers working on fossils from a Petrified Forest National Park bonebed in the FossiLab on view to museumgoers in the David H. Koch Hall of Fossils – Deep Time at the Smithsonian’s National Museum ...