text: The last reason I believe that they are natural landforms is in the 11th paragraph it says" As a rule of thumb, you can discern thigs in a digital image 3 times bigger tht the pixel size," he added. "So, if there were objects in this picture like airplanes on the ground or Egyptian pyramids or even small shacks, you could see what they are!" This paragraph tells how there was no way that with that camera they couldn't miss the fact that it was a natural landform. So, if there were alien prints they could see them with that camera though the lences.