Are children fundamentally different kinds of thinkers than adults? Or are the cognitive differences between young children and adults merely a matter of accumulation of knowledge? In this book, Susan Carey develops an alternative to these two ways of thinking about childhood cognition, putting forth the idea of conceptual change and its relation to the development of knowledge systems. Conceptual Change in Childhood is a case study of children's acquisition of biological knowledge between ages 4-10. Drawing on evidence from a variety of sources, Carey analyzes the ways that knowledge is restructured during this development, comparing them to the ways that knowledge is restructured by an adult learner, and to the ways that conceptual frameworks have shifted in the history of science.