inside story of one of nature's greatest marvels: the creation of a new human, from first cell to first breath. This is pop science, not a parenting manual, and it almost certainly contains things you didn't know on almost every page. Did you know that sperm have a sense of smell? That your body has three goes at making kidneys before it gets it right? That the groove on your lip is a seam where the sheets of skin that form your face fused together?