Jahren has built three laboratories in which she's studied trees, flowers, seeds, and soil. She tells about her childhood in rural Minnesota with an uncompromising mother and a father who encouraged hours of play in his classroom's labs; about how she found a sanctuary in science, and the disappointments, triumphs and exhilarating discoveries of scientific work. Yet at the core of this book is the story of a relationship Jahren forged with Bill, who becomes her lab partner and best friend. Their sometimes rogue adventures in science take them over the Atlantic to the ever-light skies of the North Pole and to tropical Hawaii, where she and her lab currently make their home.