Indeed, it’s only because of how many remains were found that scientists could determine how much the Dreadnoughtus weighed. This means, then, that it’s likely there were other, larger examples of the species.
Dreadnoughtus is just one dinosaur in the titanosaur family. And while these monsters may have eventually become enormous, they all started out in eggs no larger than soccer balls. Within two to three decades, however, they would have ballooned in size.