Mummified dinosaur unearthed in North Dakota

Using tiny brushes and chisels, workers picking at a big greenish-black rock in the basement of North Dakota's state museum are meticulously uncovering something amazing: a nearly complete dinosaur, skin and all.

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.

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