Long-necked dinosaurs had hollow bones in their skin according to fossils in Madagascar. The animal in question is the giant Rapetosaurus. Hollow bones are found in the skin of reptiles and a few mammals. These skin bones are called osteoderm. Dinosaurs with hollow skin bones are Titanosaura, a Sauropod, Rapetosaurus, Stegosaurus and Ankylosaurus. It is believed that the bones stored mineral for hard times. Rapetosaurus, for example, had only a few bones spread throughout their skin, so the bones were not used for defence or to moderate temperature. The fossils in Madagascar were of Rapetosaurus. What applies for Rapetosaurus can be used to evaluate the hollow bones of other dinosaurs. It cannot be ruled out that Titanosaura used the bones partially for defence but the main function of hollow bones was to store minerals. http://www.adventure--australia.blogspot.com/ http://www.tysaustralia.blogspot.com/ http://www.feeds.feedburner.com/AdventureAustralia http://www.technorati.com/