Images were illuminating but was hoping for a little more depth when I went into the article. It did lead me down the "web rabbit hole" to find this page of "Ae

Images were illuminating but was hoping for a little more depth when I went into the article. It did lead me down the "web rabbit hole" to find this page of "Aerial Photographs Reveal Mysterious Faces" http://io9.gizmodo.com/aerial-photographs-reveal-mysterious-faces-etched-into-1658293423 http://io9.gizmodo.com/aerial-photographs-reveal-mysterious-... which I found rewarding