"By the end of the seventeenth century, explorers had circled the globe and mapped the heavens. Scientists had calculated the weight of the Earth, traced the paths of comets, and divined the secrets of the Milky Way. But at the dawn of the modern age, the deeper scientific riddle of all lay unsolved: Where do babies come from? Throughout most of human history, babies were surprises. People knew the basics: men and women had sex, and sometimes babies followed. But beyond that, the origins of life were a colossal mystery--a mystery that would take centuries of wild theories, misogynist blunders, and mistakes to solve. The author investigates the early scientists who sought answers. The author's investigation careens from theaters of anatomy, where spectators gawked at dissected bodies; to princes' private museums; to a seaside laboratory in Naples, Italy where a researcher peered into his microscope and first witnessed the union of sperm and egg. The author also introduces a Danish physi