They roamed the world during the Mesozoic, a geological period ... and Permian Eras (the time before dinosaurs) and also enormous. Unearth the nine massive prehistoric animals that lived before ...

About 250 million years ago, at the end of the Permian period ... in time, heading for the Permian's conclusion. If we had driven here before the extinction, we would have seen animals as abundant ...

The period of time before the Triassic was called the Permian. This was a time when a wide variety of animals lived, including a group of animals called the synapsids, which would later evolve ...