A paleontologist was trying to locate the site of a famous 1908 discovery when a rancher in Wyoming shared an important clue.

Wyoming’s “dinosaur mummies,” once thought to preserve fossilized flesh, are actually detailed clay molds formed by microbes ...

The skeletons of a duck-billed dinosaur found more than 100 years ago are so well-preserved that they contain fleshy body ...

New research has identified a dinosaur "mummy zone" in a series of ravines near Lusk, Wyoming. It's produced two mummies of a fleshy dinosaur with ...

Mummy of the juvenile duck-billed dinosaur Edmontosaurus annectens with fossil preparator Tyler Keillor of the University of ...

Scientists discovered that some dinosaur “mummies," such as Edmontosaurus annectens, weren’t preserved skin but clay molds ...

A new study sheds light on how these reptiles become “mummies” and paints a picture of what these ancient animals looked like ...

New research in a North American “mummy zone” in eastern Wyoming reveals how giant duck-billed dinosaurs were preserved in striking detail.

A pair of Edmontosaurus specimens found in a Wyoming dig help researchers to understand the process that led them to be ...

Two duck-billed dinosaur carcasses were preserved in a thin layer of clay for 66 million years. Now, they’ve helped ...

It’s been more than 60 million years since duck-billed dinosaurs roamed around what is now known as western North America. Or ...

A team from the University of Chicago has achieved an unprecedented feat by analyzing two exceptional fossils in Wyoming ...