S01E01 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, weaker gray wolf survived?
Prehistoric Predators
S01E03: Bear
This short-faced bear was twice the size of a grizzly and could outrun a horse. It roamed North America for a million years, then went extinct. Why?
Overview
Long before humans evolved, our planet was home to some of the most vicious predators ever to have lived. Step back in time to one of the most amazing eras in the history of planet earth and meet terrifying ancient predators.
Episodes
S01E02 Sabertooth
The Sabertooth dominated the primal landscape of the Americas for nearly two million years, then suddenly, mysteriously went extinct. Find out how it lived—and died.
S01E03 Bear
This short-faced bear was twice the size of a grizzly and could outrun a horse. It roamed North America for a million years, then went extinct. Why?
S01E04 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 million years ago, the continent of South America was totally isolated by...
S01E05 Monster Shark
Megalodon. It was the biggest predator to ever swim the oceans of the world. For 20 million years, this ferocious 50-ton shark with a 7-foot jaw and seven inch teeth terrorized the creatures of the...
S01E06 Killer Pig
At four feet wide and 1,000 pounds, the killer pig was a prehistoric battle tank that dominated the North American landscape. Endowed with some truly unique bioengineering traits, the killer pig relied on its massive...
S01E07 Razor Jaws
Hyaenodon created a reign of terror by just using its head. It dominated with this one lethal weapon that could dispatch a prey animal within seconds. This beast is a perfect example of an animal...
