David C. Geary, Ph.D., is a cognitive developmental and evolutionary psychologist with interests in mathematical cognition and learning as well as the biological bases of sex differences. In this episode, we discuss the science behind what makes males and females unique. We explore why girls play with dolls, why boys tackle each other and whether societal forces have influence on these behaviors.

Dr Geary can be found at http://web.missouri.edu/~gearyd

Episode music from seanlang.com.