DAVID NUNUK / SCIENCE PHOTO LIBRARY DAVID NUNUK / SCIENCE PHOTO LIBRARY
Nazca lines. Aerial photograph of the white lines of a geoglyph, or landscape drawing, in the coastal desert of southern Peru. The white lines here represent a parrot. The geoglyphs cover huge areas and can only be properly seen from the air. They were made by removing the dark surface stone to reveal a lighter stone layer underneath. 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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