text: First of all there is a posibility that the face is just a "huge rock formation...which resembles a human head... formed by shadows giving the illusion of eyes, nose, and mouth"-paragraph 3. I believe this beacuse NASA does not come across it veary often. Therefore, every time NASA did see the face then they might of just cought the rock formation at the right time, therefore cetching the right light. In a better picture taken in 1976 by Viking 1 you can clearly see shadows wich might be the scource of the face formation.