Sauropodomorphs are a group of long-necked dinosaurs that include some of the largest animals to ever walk the Earth. They are characterized by their long necks, small heads, and massive bodies. This group is divided into two main categories: the herbivorous sauropods, like Brachiosaurus and Diplodocus, and the earlier, smaller prosauropods, which were more varied in size and shape. These dinosaurs lived during the Mesozoic Era, primarily in the late Triassic to the end of the Cretaceous period. Sauropodomorphs were primarily plant-eaters, using their long necks to reach high vegetation. Their unique adaptations allowed them to thrive in various environments, making them a significant part of prehistoric ecosystems.