“Spring is coming!” proclaims much of the United States. But let’s talk about another seasonal shift. December. Bolivia. Rainy season is truly arriving. And it is making itself known, bit by bit, on the world’s largest salt flat, Salar de Uyuni. You see, look ahead. It’s rainy season here. Water covers the earth. But look behind; it’s still dry. For a short time, rainy season and dry season will exist simultaneously. Gradually, rain will encroach upon the dry, patch by patch, until April, when the roles reverse. For a moment, though, there are two worlds right beside each other, intermingling. Where else?