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 ...

Scientists reveal that a 66-million-year-old dinosaur ‘mummy’ was preserved by a clay mask, offering new insights into ...

Edmontosaurus, which munched plants with its broad and flat snout that vaguely resembled a duckbill, roamed western North ...

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