A pair of scientists have announced a new theory for how the monstrous Easter Island statues were transported: they "walked."
An archaeologist from California and an anthropologist from Hawaii have demonstrated their theory by building their own comparatively smaller moai and using really strong ropes and a large group of people. The demonstration featured ropes tied to three of the giant statue's four sides (left, right, and back), and the volunteers moved the ropes ever so slightly back and forth, approximating a "walk."
It's the latest in a series of explanations for how the island's residents were able to move around such large structures without using heavy machinery. One widely regarded theory supposes that the island's residents cut down lots of trees and fashioned sleds on which to transport the statues. That theory, so the story goes, conveniently explains the population decrease because of the antecedent deforestation.
The proponents of this latest "walking" theory propose that the real reason for the dropoff in population on Rapa Nui was a lack of immunity to diseases brought by European "visitors."
Both theories suffer a bit when tightly reviewed, actually. If the islanders "walked" the statues, then they certainly took risks all along the way that the statues would tumble over in transit. The model moai weighed 5 tons, much less than the standing statues, some of which weighed in at 90 tons. Much safer to "sled" the statues around, unless you're eventually wanting to stand them up, which is what happened, at which point the same toppling risk would ensue, just not as much as during a "walk."
Of course, a completely implausible explanation is that the ancient (or alien) civilization that supplied the Egyptians, Sumerians, and half a dozen other peoples who experienced a "sudden and great leap forward in technology" had a giant crane or two spare and that the residents of Rapa Nui borrowed the cranes for a bit. That theory doesn't stand up to even a loose review.
As to the real story, we might never know. After all, we haven't gotten around to inventing time travel yet.
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