Figure 6-61 In the Eye of the Beholder Images (a) and (b) are of the same site on Mars, taken 22 years apart. They show how, at high resolution, the apparent face in (a) changed to a more “natural-looking” feature in (b). This change in appearance was due to improved camera technology. (c) In the same region of Mars, other erosion features also appear to be pyramids and skulls. (d) The Galle crater and its interior features combine to give the impression of a “happy face.”