Children from lost civilisation 'helped build' geoglyph some 6,000 years ago

2. ASTRONOMY

A handful of archaeologists believe geoglyphs could have been drawn to represent the important stars, planetary events like sun solstices, or constellations. However a 1968 study by the National Geographic Society found that while some of the Nazca lines did point to the positions of the Sun and Moon, it was no more than could be expected by mere chance.

3. ANCIENT ZIP CODES?

There is a theory that geoglyphs were simply ways of civilisations to mark their own territories in clear and visible ways. More often than they are giant structures in areas that can be seen from a distance or from a high vantage point, leading some experts to say they were used to mark ownership of the land.

4. PRAYER & RITUAL POINTS

The discovery of fireplaces at the Russian moose and other geoglyphs adds to speculation they were used for rituals. There is a theory that the Nazca used to dance along the lines of their geoglyphs when they prayed for rain, with many of the same images featuring on pottery from the time.

5. ALIENS

A common yet bizarre theory put forward about strange markings on the ground is that they were used by aliens. Many speculate that the straight lines of Nazca, for instance, were created as runways for spaceships, but why extra-terrestrials would attempt to land on geoglyphs in the shape of monkeys, spiders, or giant Russian moose is another question.

http://siberiantimes.com/science/casestudy/features/f0005-children-from-lost-civilisation-helped-build-geoglyph-some-6000-years-ago/