Physiology of dinosaurs way as sauropods. The pachycephalosaurs had small heads and weak jaws and teeth, but their lack of large digestive systems suggests a different diet, possibly fruits, seeds, or young shoots, which would have been more nutritious to them than leaves. On the other hand, ornithopods such as "Hypsilophodon", "Iguanodon" and various hadrosaurs had horny beaks for snipping off vegetation and jaws and teeth that were well-adapted for chewing. The horned ceratopsians had similar mechanisms. It has often been suggested that at least some dinosaurs used swallowed stones, known as gastroliths, to aid digestion by grinding their food in muscular gizzards,
Oliver (given name) "Oilibhéir", Scottish Gaelic "Oilvreis", Italian "Oliviero", Spanish "Óliver". The name was introduced to England by the Normans. It was commonly used in medieval England, but became rare after the Restoration, because of the unpopularity of Oliver Cromwell. The name was revived in the 19th century, possibly inspired by the title character of Dickens' "Oliver Twist" (1838). Pet forms of the English given name include "Ollie" and "Noll". In 2013 it was the fifth most popular name for boys in Australia. Oliver (given name) Oliver is a masculine given name of Old French origin; "Oliver" is one of Charlemagne's retainers in