Pages 16 and 17: Landscape, Mariner 4, Viking lander: NASA / JPL / Caltech; planet: NASA photo; Phobos 2: NASA / National Space Science Data Center
Pages 16 and 17: Landscape, Mariner 4, Viking lander: NASA / JPL / Caltech; planet: NASA photo; Phobos 2: NASA / National Space Science Data Center