Researchers have unearthed a spooky pair of dinosaur mummies that seem to have been preserved in an unexpected way. Mummified dinosaurs are so old that their skin and soft tissues fossilize. Scientists found new remains at a Wyoming site, including a rare young duck-billed dinosaur mummy that was only several years old. The dinosaur mummies left impressions of their skin and scales on a thin layer of clay that formed with help from microbes. This style of mummification has preserved other organisms before, but scientists didn’t think it could happen on land. The study was published Thursday in the journal Science.