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Had already created balloon the Nazca civilization?
Lima, Peru - Hypothesis comes from some experiments carried out thanks to particular clothes found
It is fascinating the idea supposed by some researchers about mysterious, giant, geometric drawings which we can admire over the Nazca plain, in the Peruvian desert, can be made with primitive balloon aid: hypothesis is from the fact that can reach perfection which we still today can appreciate, such shapes had to be monitored from on high, 300-400 metres at least. It isn't a news that Nazca civilization...
AVIONEWS - World Aeronautical Press Agency