LISTEN | Full interview with paleontologist Paul Sereno: As It Happens 6:27 Scientists discover dinosaur 'mummies' with hoofs like a horse

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

Or, more accurately, since they clomped around. On their hoofs.

This, according to a new study of “dinosaur mummies” — fossils in which the external anatomies of dinosaurs are rendered in incredible detail onto thin layers of ancient clay.

It marks the first time hoofs have been found on a dinosaur or, in fact, any reptile. But the researchers behind the discovery expect more will turn up, now that people know to look for them.

“I think people's antennae will be up now to try and make sure there's nothing there wh

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