their definatley made by some kind of non human intelligence, not necessarily aliens tho. i like the gaia theory, some kind of vortex, driven electromaticaly but conciously formed into a symbol that communicates a lot of info in it's very design.

someone's trying to tell us something, or engage in conversation. the power at work here is very powerful but very subtle. it takes a lot of energy to create a circle, but the information in the geomatry says a lot that researchers are still trying to decipher.

no one really knows who makes them, maybe we should be focusing more on what they mean than by who made them.

besides the obvious fakes they are not man made.