Acanthodian, a fish, is one of the first vertebrates with jaws. This revolutionary adaptation allows fish, a once-rare lifeform, to take over the planet.
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Phobosuchus was a prehistoric monster, the largest species of crocodile ever known to have walked the earth. Instead of zebras and wildebeest, it fed on dinosaurs.
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Triceratops, with its distinctive frills and horns, had one of the largest skulls of any land animal. It was a formidable match for Tyrannosaurus.
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Purgatorius is an early mammal that lived alongside the dinosaurs. Purgatorius is a proto-primate, one of four extinct species believed to be the earliest examples of an evolutionary line that led to monkeys, apes and humans.
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Get more Animal Armageddon at animal.discovery.com Sea scorpions called eurypterids challenged nautiloids for feeding grounds. ... animal Armageddon prehistoric animals
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