This article would have particularly interested my Dad. He got irritated with the anthropologists who insisted the petroglyphs found in Arizona were just “doodles” made by ancient Indians. He firmly insisted they were conveying real information to each other.
Have you seen David Talbot's "Symbols of an alien sky" videos yet? A lot of those "doodles" were drawings of high-energy plasma discharges that apparently were witnessed worldwide by ancient peoples. Absolutely fascinating videos. You can find them on Youtube.
http://www.youtube.com/watch?v=OH7lrjixaNA
I think your Dad was correct.. they were marking their hood
much as is done nowadays by the denizens of the barrio with their placas.
What does your Dad opine on crop circles? Alien doodles or symbols or communication?
Thanks!