Peter Brown, the Philip and Beulah Rollins Professor of History Emeritus and senior historian, and Alessandro Portelli, a lecturer in sociology, have been awarded the 2015 Dan David Prize, which recognizes achievements having an outstanding scientific, technological, cultural or social impact. Brown, recognized for reshaping our understanding of social and cultural change, and Portelli, honored for challenging the way we understand recording the past, will be awarded the $1 million prize in the category of "Retrieving the Past: Historians and Their Sources" at a ceremony May 17 at Tel Aviv University in Israel.