“A beautiful and very important book.”—Lewis Wolpert, American ScientistFor over a century, opening the black box of  embryonic development was the holy grail of  biology. Evo Devo—Evolutionary Developmental  Biology—is the new science that has finally  cracked open the box. Within the pages of his  rich and riveting book, Sean B. Carroll explains how we are discovering that complex life is  ironically much simpler than anyone ever  expected.