Location : South America

Argyrosaurus might have been the biggest dinosaur ever, but not enough fossil bone has yet been found to know for sure.

It was among the last of the giant titanosaurs, dying out in the great extinction at the end of the Cretaceous. Argyrosaurus's upper leg bone of was over 6 feet (2 m) long! Unfortunately, not much more of this dinosaur has been found.

First described in 1893, Argyrosaurus was unquestionably a huge titanosaur. Although other material has been found that may belong to this genus, no definitive association has yet been made.