Long necks, enormous bodies, tiny heads, and sweeping tails have made sauropods some of the most recognizable dinosaurs ever discovered. These plant eating giants included the largest land animals in Earth's history, with some species reaching lengths of nearly 130 feet (40 meters). Famous examples include Diplodocus and Brachiosaurus. Now, researchers studying fossils from southern Argentina have identified a new member of this iconic group. The dinosaur, named Bicharracosaurus dionidei , was smaller than the largest sauropods but still measured an estimated 65 feet (20 meters) long. Giant Dinosaur Fossil Found in Patagonia Scientists recovered parts of the dinosaur's spine, including more than 30 vertebrae from the neck, back, and tail, along with several ribs and part of the pelvis. The bone structure showed that the remains belonged to an adult animal that lived about 155 million years ago on Gondwana, the ancient southern supercontinent.…