Supersaurus

Supersaurus is a genus of diplodocid sauropod dinosaurs that existed in North America during the Late Jurassic era. Vivian Jones of Delta, Colorado, identified the type species, S. vivianae, in the middle Morrison Formation of Colorado in 1972. The fossil remnants were discovered in the Brushy Basin Member of the formation, which dates from 153 to 145 million years old.

This mammal existed around 153 million years ago. Experts had estimated that this species may grow to reach up to 141 feet long, but they have now revised their estimate to 105-138 feet. Supersaurus was the world's biggest dinosaur in either case. It did not, however, have the huge weight that one would anticipate from such a lengthy monster. Because the Supersaurus fossils are in superb condition, current estimations for the dinosaur's length have reached 120 feet or 40 meters, and may have been closer to 140 feet.

Another example of moving information: if further evidence is discovered, a virtually legendary dinosaur might push the Argentinosaurus out of third place in terms of size. The Bruhathkayosaurus fossils discovered in India included a leg, hip, and tail, and its estimated size was over 115 feet long and 80 tons. The fossils, which were described in 1987, have subsequently decomposed.