Sarah E Johns Sarah E. Johns is a Lecturer in Evolutionary Anthropology at the University of Kent, Canterbury. Her recent publications include"Red is not a proxy signal for female genitalia in humans" (PLoS ONE 2012); "Perceived environmental risk a a predictor of teenage motherhood in a British population" (Health and Place 2011); and "Teenage pregnancy and motherhood: How might evolutionary theory inform policy?" (Journal of Evolutionary Psychology 2011). Read More Read Less