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Helen Fisher, Ph.D., is a world-renowned biological anthropologist, author, expert on the nature of romantic love and the chief scientific advisor to Chemistry.com. She has spent the last 3 decades studying why we love and who we love.

She is the author of four previous books, two of which - The First Sex and Anatomy of Love were New York Times Notable Books.

Helen is research professor and member of the Center for Human Evolutionary Studies in the Department of Anthropology at Rutgers University. Prior to this she was a research associate at American Museum of Natural History. She lives in New York City.