The exquisite preservation of a new, partial skull of Parasaurolophus cyrtocristatus, a species of duck-billed dinosaur that lived during the Cretaceous period, finally revealed the structure of its bizarre ornamental crest after decades of disagreement. Life reconstruction of the head of Parasaurolophus cyrtocristatus. Image credit: Andrey Atuchin. Parasaurolophus is a genus of herbivorous ornithopod dinosaurs that is most strikingly characterized...