August 19, 2007 • 1h
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?
August 19, 2007 • 1h
The Sabertooth dominated the primal landscape of the Americas for nearly two million years, then suddenly, mysteriously went extin...Read more
September 15, 2007 • 1h
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?
April 28, 2009 • 1h
The Terror Birds of South America may be the most unusual predators ever to roam the face of the Earth. Until about five million y...Read more
April 28, 2009 • 1h
Megalodon. It was the biggest predator to ever swim the oceans of the world. For 20 million years, this ferocious 50-ton shark wit...Read more
October 12, 2009 • 1h
At four feet wide and 1,000 pounds, the killer pig was a prehistoric battle tank that dominated the North American landscape. Endo...Read more
October 12, 2009 • 1h
Hyaenodon created a reign of terror by just using its head. It dominated with this one lethal weapon that could dispatch a prey a...Read more