Evaluating Five Artificial-Origin Theories for Cydonia's Faces and Pyramids: Natural Origins Favored
To the point
Five potential artificial origins for the Cydonia faces and pyramids are proposed—an ancient Martian civilization, a civilization from a planet that once existed between Mars and Jupiter, a civilization from another planet or moon in the solar system, an ancient terrestrial civilization, or an interstellar civilization—and the analysis concludes natural explanations are far more likely.
