Brachiosaurus is probably best known for its abnormally long neck and upright posture like a giant giraffe, which is why it may be surprising to know its name means; “Arm Lizard”. This is because, much like its long neck, its front limbs were also very large giving it its trademark posture.
Brachiosaurus lived during the late Jurassic period between 150 and 154 million years ago in what is now the Western United States. Measuring between 59 and 69 feet long and weighing in at nearly 60 tons it was one of the largest sauropods of its time.