Dr. Anne Fausto-Sterling is Brown University Professor Emerita and fellow of the American Association for the Advancement of Science. She is a leading expert in biology and gender development. Using a groundbreaking new approach to understanding gender differences, Dr. Fausto-Sterling is shifting old assumptions about how humans develop particular traits. Dynamic systems theory permits one to understand how cultural difference becomes bodily difference. By applying a dynamic systems approach to the study of human development, her work exposes the flawed premise of the nature versus nurture debate.