In most ways, Supersaurus was a typical sauropod of the late Jurassic period, with its long neck and tail, bulky body, and extremely small head (and brain). What set it apart from enormous cousins like Diplodocus and Argentinosaurus was its unusual length: Supersaurus may have measured a whopping 110 feet from head to tail, or over a third the length of a football field!
Despite its extreme length, though, it’s clear that Supersaurus wasn’t the heaviest sauropod that ever lived, weighing in at “only” 50 tons or so (compared to over 100 tons for the biggest members of the breed, such as the still-obscure Bruhathkayosaurus and Futalognkosaurus). Thge closest relative of this dinosaur was once thought to be Barosaurus, but a new fossil discovery makes Apatosaurus the more likely cousin. (By the way, if Supersaurus doesn’t sound impressive enough, a related genus was named Ultrasauros, until paleontologists determined that this sauropod was really a species of Supersaurus.)