Fossils of the pterosaur were discovered in Petrified Forest National Park. The fossils date back 209 million years.

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 ...

A plant that lived 47 million years ago in what is now Utah is like nothing that lives on planet Earth today. The discovery ...

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 ecosystems ...

The well-preserved fossils show a variety of animals, plants, and leaves, with 83 different types of foliage. Plant-insect ...