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Cydonia (Mars) - Wikipedia
Situated in the Mare Acidalium quadrangle on Mars, the Cydonia region includes Cydonia Mensae, Cydonia Colles, and Cydonia Labyrinthus and is home to the "Face on Mars," a humanoid-looking mesa that first appeared in Viking 1 imagery released in 1976 and, after Gerald Soffen’s initial dismissal and a second sun-angle image that reinforced the illusion, sparked widespread pareidolia; subsequent missions—Mars Global Surveyor, Mars Express, and HiRISE—produced higher-resolution data that showed the feature to be a natural hill whose face-like appearance depends on viewing angle and illumination, with official assessments finding no evidence of artificial construction, a debate that spurred speculation by Richard C. Hoagland and criticism by Carl Sagan as overinterpretation linked to intelligent design and pseudoscience, while skeptics note other facial-like formations exist but attract less attention, leaving Cydonia a lasting topic of discussion in science and popular culture, now reinforced by newer imagery that supports a natural geological origin though interpretation and perception continue.
