In zombie fiction, outbreaks of the living dead often occur when humans tamper with nature.

FACT CHECK: We strive for accuracy and fairness. But if you see something that doesn't look right, contact us!

RELATED CONTENT

Learn more about Counter-Zombie Dominance, the Pentagon's plan in case of a zombie apocalypse.

In this clip from UFO Files, we get to learn a little about the ancient civilization of the Mayans. Learn how they were practically making runways that only can be seen from the sky. You need to check it out here. Some people agree that "Gods" came from the sky to give Earth technology. The Mayans storyboards show the same.

Historian Yohuru Williams dives into the history of the Olympic Games.

See how the Civil War prompted a quantum leap in warfare technology.

Christmas lights have evolved from novelty item to household essential.