Today’s guest is Dr. David Geary, a cognitive developmental scientist whose wide-ranging interests are particularly focused on evolutionary psychology, sex differences and children’s mathematical development.He is a Curators' Distinguished Professor and a Thomas Jefferson Fellow in the Department of Psychological Sciences and Interdisciplinary Neuroscience Program at the University of Missouri Columbia.David’s book, “Male, Female: The Evolution of Human Sex Differences,” has been described as a landmark text that provides a comprehensive evolutionary model to explain sex differences. His research on children’s mathematical development resulted in a MERIT award from the National Institutes of Health. In addition to authoring four books, he has published more than 300 articles and chapters across a diverse range of topics.David has served as a member of the President’s National Mathematics Advisory Panel and was appointed by President George W. Bush to the National Board of Directors for the Institute for Education Sciences.