Titanosaurs were a group of large, long-necked dinosaurs that lived during the Late Cretaceous period. They belonged to the group of sauropods, known for their massive size and herbivorous diet. Titanosaurs were characterized by their long tails, small heads, and thick legs, which supported their enormous bodies. Some species could reach lengths of over 100 feet. These dinosaurs were found on every continent, indicating their wide distribution. Fossils of titanosaurs have been discovered in places like Argentina and India. They likely lived in herds and fed on vegetation, using their long necks to reach high branches and low-lying plants.