If you thought that crocodiles were menacing enough, be glad that you didn’t live in Arizona some 225–201 million years ...

The poodle-sized reptile that lived over 200 million years ago was among creatures that had features similar to dinosaurs it ...

Learn how fossils from Arizona’s Petrified Forest National Park revealed that a Late Triassic crocodile relative may have started life on four legs before walking on two as an adult.

A "peculiar" ancient relative of the crocodile which experts believe began life on four legs before, in adulthood, it learned how to walk on just two has been revealed in a new study. Named ...

He also noted that features such as bipedalism, toothless beaks, hollow bones, and large eye sockets are typically associated ...

Researchers believe these creatures started out on four legs and later began walking on two legs as they grew.

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.

This is a new field trip to a sand pit near Shoofly that contains small fossils and petrified wood from ancient Lake ...