Full name:Brachiosaurus brancai Brachiosaurus, meaning "arm lizard", was a genus of sauropod dinosaur that lived during the Late Jurassic Period, Tanzania,Africa. It was named thus because its forelimbs were much longer than its hind limbs. One of the largest animals ever to walk the earth.Brachiosaurus was around 25 meters (82 feet) in length and was probably able to raise its head about 13 meters (42 ft) above ground level.Weight is in the range 32 tonnes to 37 tonnes. Brachiosaurus was fully cold-blooded or was a passive bulk endotherm (or gigantotherm). Brachiosaurus nostrils were long thought to be located on the top of the head.New studies show that, while the nasal openings in the skull were placed high above the eyes, the nostrils would still have been close to the tip of the snout ,the tall crests of brachiosaurs supported some sort of fleshy resonating chamber. Brachiosaurus was one of the largest dinosaurs of the Jurassic era; it lived on prairies filled with ferns, bennettites and horsetails, and it moved through vast conifer forests and groves of cycads, seed ferns and ginkgos. Some of its contemporary genera included Stegosaurus, Dryosaurus, Apatosaurus and Diplodocus. While it is speculated that groups of Brachiosaurus moved in herds, fully grown individuals had little to fear from even the largest predators of the time, Allosaurus and Torvosaurus, on account of their sheer size.