What is the heaviest dinosaur?

The sauropods were the largest and heaviest dinosaurs. For much of the dinosaur era, the smallest sauropods were larger than anything else in their habitat, and the largest were an order of magnitude more massive than anything else that has since walked the Earth. read more

The heaviest known dinosaur is currently Argentinosaurus, a beast so massive it shook previous dino size tables when it was described in the 1990s. Weight estimates range from 60 to 100 tonnes: again, we cannot be precise because the fossils are so limited. Now there is another challenger in the dinosaur big leagues. read more

Certainly, it was a dinosaur, and certainly a sauropod. Perhaps the biggest sauropods were the biggest creatures that ever existed, beating even the blue whale (record specimens measure more than 33 meters (110 feet), and the weight comes to 190 tons). read more