Most animals stick to four legs. It feels normal, almost automatic in nature. But then there are a few surprising ones that break the pattern completely and rely mainly on two legs to move around.

A bizarre 212 million year old crocodile relative walked on two legs like a dinosaur, with a toothless beak and tiny arms.

When you picture an ancient crocodile from millions of years ago, you probably imagine a low-slung, scaly water predator waiting patiently to ambush its prey. But the deep history of the crocodile ...

Artist's reconstruction of Sonselasuchus cedrus in its environment in what is now Petrified Forest National Park, 215 million years ago. (Artwork by Gabriel Ugueto) (CN) — An ancient crocodile ...

A "peculiar” ancient relative of the crocodile started life on four legs before it began walking on two, according to new research. The poodle-sized reptile that lived over 200 million years ago was ...