Paleontologists are rethinking the history of a dinosaur species after discovering a remarkably intact stegosaur skull in Spain that offers new clues about how these iconic plated dinosaurs developed and spread across the planet. As reported in ScienceDaily, researchers from the Fundación Conjunto Paleontológico de Teruel-Dinópolis discovered an unusual skull fossil dating back 150 million years in Spain's Teruel province. The team identified th…