Unearth the nine massive prehistoric animals that lived before dinosaurs. The shield lizard, or the Scutosaurus, arose towards the end of the Carboniferous period, around 298 million years ago.

The Scutosaurus was a reptile that lived in Russia ... and while many people may think that it’s a dinosaur, the Dimetrodon is actually a reptile. These large mammal-like reptiles lived during ...