A man named Richard Hoagland claimed that 1976 photographs of the Cydonia region of Mars showed a human-like face. The so-called "Face on Mars" rose to international fame as Hoagland waxed speculatively about the significance of the stunning find: Was it a sign for us from extraterrestrials? Where were the builders of this magnificent monument? On April 5, 1998, the Mars Global Surveyor took photographs of the same region in far higher resolution than was possible in 1976. The new images clearly showed an area heavily eroded, and that the "face" was simply the result of low image quality, the brain's tendency to see human forms and faces, and tricks of light and shadow.