DAVID NUNUK / SCIENCE PHOTO LIBRARY DAVID NUNUK / SCIENCE PHOTO LIBRARY
Nazca lines representing part of the leg of a spider, seen from the ground at sunrise. There are hundreds of geoglyphs, or landscape drawings, in the coastal desert of southern Peru. The lines were made by moving the dark stones to reveal the lighter material underneath. Many of the geoglyphs take the form of stylised animals and other, unknown objects. They cover huge areas and can only be properly seen from the air. They are thought to have been made by the Nazca, a native South American people, around 2000 years ago. Theories about the lines have ranged from uses in astronomy (for seasonal agriculture) to ceremonial uses in religion.
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