National Geographic : 1977 Jan
MARS As Viking Sees It Orbiters and landers of two NASA spacecraft photograph and examine the red planet as never before, solving some old puzzles and revealing new ones. Slanting sunlight accentuates foot-high boulders in the red Martian desertscape (left) where Viking 1 landed. The planet shows its pitted face (above) to the approaching spacecraft. Clouds mantle the north; frost or haze fills craters to the south.