I think that may be some computer code for quotes or an apostrophe. Perhaps it relates to that “Posting HTML” notice under the posting information.
This is very exciting about the geo”glyphs” being found in central Asia. We are just beginning to find all that satellite/Google Earth type study can provide. I remember spending hours looking over the system of irrigation canals in southern Africa that cover an area 300 miles square, that someone posted here. That one doesn’t even seem to have any archaeology group making plans to do something or trying to get the local government(s) interested in studying it. And then there is all the coastal plains between sea level and 400 feet down that ought to be engaging researchers. So much still to discover.
There’s a thread about the hash problem, John and Jim are working on it.