Was the apatosaurus the tallest of its time?

Apatosaurus could have held its head at most 17 feet (5.4 m) off the ground (Parrish and Stevens,1999). Allosaurus, which was the biggest meat-eater at that time in North America, was only 15 feet (4.6 m) tall. read more

Apatosaurus was a generalized browser that likely held its head elevated. To lighten its vertebrae, Apatosaurus had air sacs that made the bones internally full of holes. Like that of other diplodocids, its tail may have been used as a whip to create loud noises. read more

Apatosaurus louisae was the first specimen found at Dinosaur National Monument. The Yale Peabody Museum of Natural History features the mounted skeleton that O.C. Marsh used to describe the genus Brontosaurus. A mounted Apatosaurus skeleton is the focal point of the American Museum of Natural History's collection. read more