Brachiosaurus, the "Arm Lizard," is recognized as a marvel of the prehistoric world because of the amazing heights these mysterious dinosaurs reached during their long reign on Earth. With a maximum height of 12 meters and length of almost 20 meters, the Brachiosaurus loomed over other dinosaurs of its time. Like most sauropods, its size acted as a safeguard against the appetites of contemporary predators like Allosaurus; only young, old, and sick Brachiosaurus were susceptible to attack. Unlike many other sauropods, the neck of Brachiosaurus was straight and upward-facing due to the incline of its back. This gave it its height, which allowed it to browse the highest foliage, something other herbivores couldn't take advantage of. As a rare Jurassic sauropod in North America's Morrison Formation, Brachiosaurus enjoyed existence along with other sauropods, such as Diplodocus and Camarasaurus, and other famous creatures like the Stegosaurus. It roamed across North America in semiarid environments with plenty of vegetation to sustain its massive body. For a time, Brachiosaurus was considered the largest of the dinosaurs, but Argentinosaurus took the title away from the beloved Brachiosaurus.