Research into the links between culture and biology has the potential to transform our understanding of the role of nature and nurture in shaping evolution, adaptation, and development. For researchers in this area, culture and biology are two domains of equal importance and constant coevolution. Exploring this emerging and interdisciplinary field for the first time, The Handbook of Culture and Biology examines how researchers are defining how cultural and biological processes have evolved together in humans and animals, how they influence each other, and how this relationship shapes typical and atypical development.