There are remnants of an ancient civilization on Mars that at one time also colonized Earth. Those who pursue this matter academically are not off track, recognizing the similarities between these structures and those of ancient Egypt. It is not in the imagination of man that some of the structures on Earth, such as the Giant Pyramids and the Sphinx, seem reminiscent of structures on Mars. Same group, same handiwork. They liked to leave a statement, and have. There is speculation that the Face on Mars and nearby pyramids were used as astronomical markers, and this was indeed their prime purpose. They wanted an unmistakable marker which could be seen on approach, as the surface of Mars has few distinguishing characteristics.