Whatever we might like to believe, as Dr. Steven Rhoads shows, sex distinctions remain a deeply rooted part of human nature. In "Taking Sex Differences Seriously", Rhoads assembles a wealth of scientific evidence showing that these differences are "hardwired" into our biology. Distinctions can range from the subtle (men get a chemical high from winning while women get one from nursing) to the profound (women with high testosterone levels are more promiscuous, more competitive, and more conflicted about having children than those with average levels). From the Series:UVA NewsMakers 2006