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

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

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

A clay layer one-hundredth of an inch thick preserves the fleshy details of dinosaurs buried suddenly in east-central Wyoming ...

To gain a better understanding of the creature, a team at the University of Chicago led by anatomist Paul Sereno tracked down ...

Researchers now have a new idea of what a certain type of duck-billed dinosaur looked like, thanks to experts from the ...

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

In a new paper in Science, experts from the University of Chicago describe steps that took place some 66 million years ago to transform the carcasses of a duck-billed dinosaur, Edmontosaurus annectens ...

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