The painted desert of Arizona’s Petrified Forest National Park is a fossil wonderland. Scattered through the sunbeaten rock are rainbow-colored trunks of prehistoric conifers, the crumbling bones of ...

A cache of Triassic fossils in Arizona has revealed Eotephradactylus mcintireae, or "ash-winged dawn goddess," the oldest ...

Arizona's Petrified Forest National Park has done it again. The famed fossil-rich ground has provided paleontologists a ...

In the remote reaches of Arizona s Petrified Forest National Park, scientists have unearthed North America's oldest known pterosaur a small, gull-sized flier that once soared above Triassic ...

A single deposit has produced a wealth of fossils revealing the late Triassic ecosystem, where giant amphibians cohabited with newcomers, including turtles and pterosaurs. The 12 million years leading ...

A rare Triassic fossil site reveals North America's oldest known pterosaur, Eotephradactylus mcintireae, in what was once a rich ecosystem.

This left a gap in the fossil record, but Petrified Forest National Park didn’t get its name for nothing: The volcanic ash that burst from California’s Mojave Desert ended up in northeast Arizona’s ...

The gull-sized pterosaur was found at the Petrified Forest National Park in Arizona along with hundreds of other fossils ...

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 venerable lineages that were ...