One of the world’s greatest ancient enigmas, the Nazca lines are a dense network of criss-crossing lines, geometric shapes, and animal figures etched across 200 square miles of Peruvian desert. Who created them and why? Ever since they were discovered in the 1920s, scholars and enthusiasts have raised countless theories about their purpose. Now, archaeologists have discovered hundreds of long-hidden lines and figures as well as evidence of ancient rituals, offering new clues to the origins and motivations behind the giant desert symbols.

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A look at the state of the global environment including visionary and practical solutions for restor...

The documentary chronicling Oly Rush's world record attempt to swim non-stop around Grand Cayman. A...

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwi...

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Poliske was contaminated with radioactive material after the 1986 Chornobyl disaster. Soviet authori...