 Stegosaurus was the largest stegosaur, possibly weighing up to 5,000 kg (5.5 tons). Soon after its discovery, Marsh considered Stegosaurus to have been bipedal, due to its short forelimbs. He had changed his mind, however, by 1891, after considering the heavy build of the animal. Although Stegosaurus is undoubtedly now considered to have been quadrupedal, some discussion has occurred over whether it could have reared up on its hind legs, using its tail to form a tripod with its hind limbs, and browsing for higher foliage. This has been proposed by Bakker and opposed by Carpenter.
