"The Nazca Lines are a series of ancient geoglyphs located in the Nazca Desert in southern Peru. They were designated a UNESCO World Heritage Site in 1994. The high, arid plateau stretches more than 80 kilometres between the towns of Nazca and Palpa on the Pampas de Jumana about 400 km south of Lima. Although some local geoglyphs resemble Paracas motifs, scholars believe the Nazca Lines were created by the Nazca culture between 400 and 650 AD.
The lines are shallow designs made in the ground by removing the ubiquitous reddish pebbles and uncovering the whitish ground beneath. Hundreds are simple lines or geometric shapes; more than seventy are zoomorphic designs of animals such as birds, fish, llamas, jaguar, monkey or human figures. Other designs include phytomorphic shapes such as trees and flowers. The largest figures are over 200 metres (660 ft) across.
Scholars differ in interpreting the purpose of the designs, but in general they ascribe religious significance to them. The geometric ones could indicate the flow of water or be connected to rituals to summon water. The spiders, birds, and plants could be fertility symbols. Other possible explanations include: irrigation schemes or giant astronomical calendars.
Due to the dry, windless, and stable climate of the plateau and its isolation, for the most part the lines have been preserved. Extremely rare changes in weather may temporarily alter the general designs.
After people traveled over the area by plane in the 1930s and saw the Nazca Lines from the air, anthropologists started studying them, with focus on trying to understand how they were created.
Scholars have theorized the Nazca people could have used simple tools and surveying equipment to construct the lines. Studies have found wooden stakes in the ground at the end of some lines, which support this theory. One such stake was carbon-dated and the basis for establishing the age of the design complex.
In total, the earthwork project is huge and complex: the area encompassing the lines is nearly 500 square kilometres, and the largest figures can span nearly 270 metres. The extremely dry, windless, and constant climate of the Nazca region has preserved the lines well. The Nazca desert is one of the driest on Earth and maintains a temperature around 25 °C (77 °F) all year round. The lack of wind has helped keep the lines uncovered and visible to the present day.
Archeologists, ethnologists and anthropologists have studied the ancient Nazca culture and the complex to try to determine the purpose of the lines and figures. One theory is that the Nazca people created them to be seen by their gods in the sky. Kosok and Reiche advanced a purpose related to astronomy and cosmology: the lines were intended to act as a kind of observatory, to point to the places on the distant horizon where the sun and other celestial bodies rose or set. Many prehistoric indigenous cultures in the Americas and elsewhere constructed earthworks that combined such astronomical sighting with their religious cosmology, as did the later Mississippian culture at Cahokia in present-day United States. Another example is Stonehenge in England. But, Gerald Hawkins and Anthony Aveni, experts in archaeoastronomy, concluded in 1990 that there was insufficient evidence to support such an astronomical explanation.
In 1985, the archaeologist Johan Reinhard published archaeological, ethnographic, and historical data demonstrating that worship of mountains and other water sources predominated in Nazca religion and economy from ancient to recent times. He theorized that the lines and figures were part of religious practices involving the worship of deities associated with the availability of water, which directly related to the success and productivity of crops. He interpreted the lines as sacred paths leading to places where these deities could be worshiped. The figures were symbols representing animals and objects meant to invoke the gods' aid in supplying water. But, the precise meanings of many of the individual geoglyphs remain unsolved as of 2011.
Some individuals propose alternative theories. Jim Woodmann believes that the Nazca Lines could not have been made without some form of manned flight to see the figures properly. Based on his study of available technology, he suggests that a hot air balloon was the only possible means of flight. To test this hypothesis, Woodmann made a hot-air balloon using materials and techniques that he understood to be available to the Nazca people. The balloon flew, after a fashion. Most scholars have rejected Woodmann's thesis as ad hoc, because of the lack of any evidence of such balloons.
Swiss author Erich von Däniken suggests the Nazca lines and other complex constructions represent higher technological knowledge than he believes existed when the glyphs were created. Von Däniken maintains that the Nazca lines in Peru are runways of an ancient airfield that was used by extraterrestrials mistaken by the natives to be their gods."
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