text: Scientists at NASA, have enough knowledge and have done enough reshearch to differniate if events or landforms, like the Face, happen natrually or unaturally. For example," Scientists figured it was just another Martian mesa, common enough around Cydonia, only this one had unusal shadows that made it look like an Egyptian Pharaoh." (paragraph 2). Another insistance was when NASA shared the image of the Face and the author who wrote the caption clearly explained how the landform looked like a face. "huge rock formation... which resembles a human head... formed by shadows giving the illusion of eyes, nose, and mouth."(paragraph 3).