orangepeaceful79, on 17 October 2012 - 05:29 PM, said:
Except that no archaeological evidence has ever been found to support any claim that they knew how to make balloons or gliders.
Even if they could fly...how would it help them?
They could observe the area, but how would they transfer that to locating the diagram on the ground?
The would need to take photos at a minimum, and even that wouldn't help unless there were reference points on the ground to correlate. Many of these areas are barren, rocky wastelands without so much as a tree for a reference point.
I think they just drew them as they are using some method we haven't thought of. There's a lot can be done by just driving a stake into the ground and attaching a length of rope to it for example. Or pacing out distance. Or measuring off longer distances with lengths of rope. Crop circles are an example of these methods.
Edited by synchronomy, 17 October 2012 - 05:41 PM.
At the heart of science is an essential balance between two seemingly contradictory attitudes--an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new.
This is how deep truths are winnowed from deep nonsense. -- Carl Sagan