Yahui:	Wind, sand, sun: aren't those the elements of a desert?
Carlos:	(raising his eyebrows) Aren't you forgetting humans?
Yahui:	(shaking her head) No, humans aren't that essential. Our sense of self-importance is far too over-inflated.
Carla:	(nodding) Often that seems true. Besides, humans are not the only creatures that dream . . .