Physiology of dinosaurs and that this was a feature they shared with birds. In 2007 Oliver Wings reviewed references to gastroliths in scientific literature and found considerable confusion, starting with the lack of an agreed and objective definition of "gastrolith". He found that swallowed hard stones or grit can assist digestion in birds that mainly feed on grain but may not be essential—and that birds that eat insects in summer and grain in winter usually get rid of the stones and grit in summer. Gastroliths have often been described as important for sauropod dinosaurs, whose diet of vegetation required very thorough digestion, but
Nana (given name) by Nana. Non-royal Ghanaian people also use Nana as a given name. In some cases, they may adopt the name Nana, if they have been named after a monarch. In Ghana, one can respectfully refer to a King or Queen as Nana without mentioning their full name. Nana (given name) Nana is a given name that has different origins in several countries across the world. Its use as a feminine or masculine name varies culturally. It is feminine in Japan, Korea, Georgia and Greece, and it is masculine in Ethiopia and India, and epicene in Ghana and Indonesia. In Georgia,