Brachiosaurus was a giant sauropod that lived during the late Jurassic period.
Brachiosaurus was about 80 feet long and was larger than the other famous diplodocus. Its name means arm lizard and it looked like a giant girrafe, except a reptile, of course. It was once thought to be the largest dinosaur that ever lived, but scientists know now, that it wasn't. It is now named something different, girraffititan, which means, girrafe giant as titan.