Rocks found along the Colorado River in Arizona turned out to contain fossilized fragments of soft-bodied creatures, suggesting the site may have been an “evolutionary hotbed” ...

The species was a reptile that lived around 220 million years ago during the Triassic Period. It was found in the Thunderstorm Ridge area of the park.

The fossil was found by a group of researchers at Petrified Forest National Park in Northern Arizona, and gives interesting insights into the Tanystropheidae clade and northern Arizona’s ancient ...

A group of Arizona State scientists was among a team that uncovered a new species of fossils, shedding more light on human ...

A fossil from a seagull-sized winged reptile that lived millions of years ago was found in Arizona, and the creature has now been identified as a new species. The new type of pterosaur, named ...

A fossil found in Arizona reveals a new pterosaur species, Eotephradactylus mcintireae, also known as ash-winged dawn goddess, Smithsonian officials announced.

WASHINGTON (Reuters) -Scientists have unearthed in Arizona fossils from an assemblage of animals, including North America's oldest-known flying reptile, that reveal a time of transition when ...

A fossil from a seagull-sized winged reptile that lived millions of years ago was found in Arizona, and the creature has now been identified as a new species. The new type of pterosaur, named ...

A fossil from a seagull-sized winged reptile that lived millions of years ago was found in Arizona, and the creature has now been identified as a new species. The new type of pterosaur, named ...