Seasons & Episodes
Wolf
In the ice age, the dire wolf was larger and more powerful than any modern-day wolf. Why did it vanish while the smaller
Sabertooth
The Sabertooth dominated the primal landscape of the Americas for nearly two million years, then suddenly, mysteriously
Bear
This short-faced bear was twice the size of a grizzly and could outrun a horse. It roamed North America for a million ye
Terror Bird
The Terror Birds of South America may be the most unusual predators ever to roam the face of the Earth. Until about five
Monster Shark
Megalodon. It was the biggest predator to ever swim the oceans of the world. For 20 million years, this ferocious 50-ton
Killer Pig
At four feet wide and 1,000 pounds, the killer pig was a prehistoric battle tank that dominated the North American lands
Razor Jaws
Hyaenodon created a reign of terror by just using its head. It dominated with this one lethal weapon that could dispatc
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