The bones of another giant herbivore were recently discovered in the Argentinian province of Rio Negro. This amazing discovery may have unearthed the longest dinosaur to ever roam the earth. Four previously unknown types of dinosaurs have also been found in Argentina. These dinos date back to the Jurassic period, about 150 to 160 million years ago. These new species include sauropods.
Sauropods are very large plant-eaters with long necks, small heads, blunt teeth and very long tails.
Finding so many dinosaurs in one place raises many questions and may even change some of the theories paleontologists have about dinosaurs. Because so many of the same species have been found in one place, these dinosaurs may have hunted or moved as a herd. The abundance of dinosaur bones has paleontologists in steep competition for finding the biggest or the most dinosaurs. So many fossils are constantly uncovered that there aren't enough palentologists to unearth and identify the bones. Many areas sill remain unexplored, waiting for paleontologists to make new dinosaur discoveries.