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 ...

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

Researchers discovered that a 215-million-year-old reptile started life on four legs and switched to two as an adult.

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.

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

When dinosaur fossils surface at a site, it is often not possible to tell how many millions of years ago their bones were buried. While the different strata of sedimentary rock represent periods of ...