Main Content
Several light colors such as yellow, pink, green, and blue streak up the picture. A river splits the picture in two. A barely noticeably red dot is along the river and just above the center.

On the edge of the Kalahari Desert in Namibia, sand dunes are encroaching onto once-fertile lands in the north. Healthy vegetation appears red in this image; in the center, notice the lone red dot. It is the result of a center-pivot irrigation system, evidence that at least one optimistic farmer continues to work the fields despite the approaching sand.