Ancient alien theorists like Erich von Däniken believe that, thousands of years ago, extraterrestrials landed on Earth, where they were hailed as gods and helped shape human civilization. But what proof could possibly exist for such an encounter? Proponents of the theory point to two types of evidence: ancient religious texts and physical specimens such as cave drawings, stone sculptures and pyramids. Is your curiosity piqued? Here’s a quick introduction to some of the most famous examples.
The Nazca Lines
Etched into a high plateau in Peru’s Nazca Desert, a series of ancient designs stretching more than 50 miles has baffled archaeologists for decades. Along with simple lines and geometric shapes, they include drawings of animals, birds and humans, some measuring more than 600 feet across. Because of their colossal size, the figures can only be appreciated from way up in the air—and there is no evidence that the Nazca people, who inhabited the area between 300 B.C. and 800 A.D., invented flying machines. According to ancient alien theorists, the figures were used to guide spaceships as they came in for a landing, and the lines served as runways.
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