The Brachiosaurus, a herbivore, used its giraffe-like neck to graze in the tops of trees. It is believed to have reached heights of up to 13 meters (42 feet), lengths of 25 meters (82) feet, and weights in excess of 90 tons. Once considered the largest known dinosaur, it has since been surpassed by the likes of Argintinosaurus and Sauroposeidon.