The heaviest animal that has ever lived on Earth is the blue whale, whose weight exceeds 150 tons. As far as we know, no living organism in history has had a similar mass. But some creatures could boast of larger sizes.

Dinosaurs enjoy, perhaps, undeserved attention of the public, because besides them, many other animals of enormous size lived on Earth, which we will never see in the flesh. Some of them are gigantic ancestors of living creatures, while others did not leave offspring, and therefore seem especially amazing. The remains of prehistoric giants can shed light on the gradual changes in living conditions on Earth, since the size of animals is often directly dependent on the environment.

In addition, there is something bewitching in the extinct giants, the appearance of which we can only imagine.