Posthuman Blues

Could Nazca Lines Have Been Made By Astral Projection? (Greg Bishop)

But the problem remains: How did the ancient Nazcan people know how accurate they were after the fact for hundreds of the geoglyphs, some apparently not readily visible from the nearby hills?

I was not really surprised to find out that someone had already proposed that the Nazca lines were made by people who had mastered the techniques of out-of-body travel. In his 1988 book Lines To The Mountain Gods, archaeologist Evan Hadingham proposed that the Nazcans may have used psychedelic substances for shamanistic journeys over the area to check out their work (at least this is what non-scientific and new-age websites claim - I don't have a copy of the book.) This seems like a far-fetched theory coming from someone who works as a senior science editor for the PBS NOVA series, but the basic idea has merit.