One of the world's greatest ancient enigmas, the Nazca linesare a dense network of crisscrossing lines, geometric shapes,and animal figures etched across 200 square miles of Peruviandesert. Who created them and why? Ever since they wererediscovered in the 1920s, scholars and enthusiasts haveraised countless theories about their purpose. Now,archaeologists have discovered hundreds of long-hidden linesand figures as well as evidence of ancient rituals, offeringnew clues to the origins and motivations behind the giantdesert symbols.