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The reptiles evolve, and the race for survival continues on land. Giant arthropods lurk in the Carboniferous forest, and sail-backed mammal-like reptiles fight for the survival of their young in the Permian.
Did You Know?
The amphibian that threatens the Dimetrodon nest, and eventually gets eaten by one of those creatures, is never named in the show. It is a Seymouria. See more
The Mesothelae spider injects black venom into its victim, however spiders are known to have clear venom. See more
The rising water levels suit one group of hunters: amphibians. They've continued thriving over the last sixty million years. Their thin skin still restricts them to the water's edge, but they're now powerful predators, with a devastating pair of jaws, ready to ambush anything that wanders within reach.