This image released by the National Museum of Brazil, shows a plaster cast covering fossils of what could be a new dinosaur species, named as Futalognkosaurus dukei dinosaur, in Rio de Janeiro, Monday, Oct. 15, 2007. The Patagonian dinosaur was uncovered on the banks of Lake Barreales in the Argentine province of Neuquen and according with the scientists the giant herbivore walked the Earth some 88 million years ago, during the late Cretaceous period. [Agencies]