Book excerpt: A pioneering ethnobotanist, Gary Paul Nabhan credits the arts with sparking unlikely scientific breakthroughs and believes that such "cross-pollination" engenders new forms of expression that are essential to discovery. In this highly readable book, he tells four stories to illustrate this idea. In the first, coping with color blindness in art class leads to his career as a scientist; in the second, ancient American Indian songs, when translated, reveal an understanding of plants and animals that rivals modern research; in the third, a poem inspires an approach to diabetes using desert plants; and in the fourth, a coalition of scientists and artists creates the Ironwood Forest National Monument in the Sonoran Desert.