Massive fossil of an old dinosaur called "Nullotitan Glaciaris," was discovered in Argentina. According to the scientist, the prehistoric animal has 82 feet long and was dug up in Argentina's southern El Calafate area. Picture it as a double-decker bus, only longer and has wondered the Earth 70 million years ago. Paleontologists from the Buenos Aires, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, are responsible for this fantastic discovery. Besides the size of this fossil, scientists have also discovered that the quadruple creature was a herbivore with a very long neck. A massive dinosaur was unearthed in Argentina "The Nullotitan was one of the last great dinosaurs, the last giants that lived on the earth," said lead paleontologist Fernando Novas, "It was a common animal because we found a great number of its bones during the dig." Scientists have also discovered a smaller yet still massive fossils measuring 13 feet (four meters). The smaller dinosaur was named the Isasicursor Santacrucensis and was very agile, moving fast over the ground. "We found many bones from this animal but of different sizes, adults and youth, all mixed, together," said Mr. Novas. This discovery is one of the few proofs that "they formed packs as a defense mechanism against predators, that in the past were giant carnivores related to Tyrannosaurus Rex." According to him, the new archaeological site is full of dinosaur and plant fossils, as well as other vertebrae. The question remaining is: How long have the dinosaurs survived after the asteroid that struck our planet 66 million years ago? Opinions are divided University of Berkley, California, believes that dinosaurs were still alive 30,000 years after the enormous meteorite impact, which caused the demise after 100,000 years of extreme change of atmosphere. However, others believe paleontologist Ken Lacovara previously saying: "They died suddenly and were buried quickly. It tells us this is a moment in geological time. That's days, weeks, maybe months. But this is not thousands of years; it's not hundreds of thousands of years. This is essentially an instantaneous event."