For more than a century, a puzzling fossil jawbone unearthed in South Wales has kept paleontologists guessing. Instead, it represented a unique and distinct theropod dinosaur, large for its time, and deserving of its own genus. The Newtonsaurus fossil used in this recent study isn’t made of bone but instead is a natural rock mold. Alongside Newtonsaurus, South Wales has yielded other Triassic vertebrates, including small dinosaurs, early crocodylomorphs, and primitive reptiles. Was this predator an isolated giant roaming Late Triassic Wales, or part of a broader population of large theropods across Europe?