Each of us experiences the joy and despair that love brings. And for centuries, people have been trying to understand what it is. Why do we lose our heads? How do we survive rejection? What happens to the feelings of spouses in a long marriage? How do we win love, and can it be maintained? Renowned anthropologist Helen Fisher's book offers new and sometimes unexpected answers to these questions. By scanning the brains of a wide variety of patients, she uncovered important patterns, beginning with the fact that certain areas of the brain 'light up' when falling in love. Exploring the types of love, its evolution, and the processes occurring in the human body and in other creatures—from wolves to ducks and chimpanzees—the author provides a scientific explanation for the most astonishing manifestations of this universal driving force.