September 22, 2006 6:06 AM PDT
In 1976, one of the first images from the Viking 1 spacecraft showed a formation in the Cydonia region of Mars that NASA said "resembled a human face." NASA scientists quickly interpreted the image as having been caused by the angle of the Sun and resulting shadows. But that didn't stop claims that the "Face on Mars" proved there was intelligent life on the Red Planet.
The European Space Agency's Mars Express, equipped with its High Resolution Stero Camera, recently revisted Mars's most famous feature.
Photo by NASA/JPL
