"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.