Unlike almost every other dinosaur fossil ever found, the Edmontosaurus named Dakota, a duckbilled dinosaur unearthed in southwestern North Dakota in 2004, is covered by fossilized skin that is hard as iron. It's among just a few mummified dinosaurs in the world, say the researchers who are slowly freeing it from a 65-million-year-old rock tomb.
CNN has reported on finding an Edmontosaurus with the fossilized skin still intact in the rock. This should add greatly to our knowledge of dinosaur skin and to the biology of that era.
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