text: The Face of Mars could have been made by alien because of the unexplainable things on Earth itself. In the last passage it states that i could have been made bye aliens. Compared to all of the things on Earth. It could be a possiblity of aliens making the Face on Mars. For example, in the last passage it says that Garvins say, "That it slike the lava dome that takes the form of an isolated mesa about the same height as the Face on a Mars."