Longest dinosaurs

The suborder of dinosaurs called the sauropoda were herbivorous land animals that first appeared in the late Triassic, around 200 million years ago. They included the well-known Diplodocus and Brachiosaurus, but the longest of all was Amphicoelias estimated at around 60 m (197 ft), based on the size of part of a single vertebra discovered in 1870.