Scientists find the first giant dinosaur of more than 200 million years in San Juan, Argentina
Dinosaurs dominated the terrestrial ecosystem for more than 140 Myr during the Mesozoic Era (which started 250 Myr and ended 66 Myr ago). The sauropodomorphs group, a huge family of herbivore dinosaurs, comprises the largest land species ever recorded. So far, the first giant dinosaurs, which weighted more than 10 tones, appeared during the...