I wanted to talk about a couple of ways in which journalists often mistake sex for gender. There was a study that came out in 2003 from a research group at UCLA where they looked at sex-based gene expression in the brains of fetal mice. I have a little section of the article up here where I've put in red the part where you can see that sort of pop culture ideas about gender have gotten in the way of reporting on the research,

I think that he meant to say that somehow, learning about these differences in mice would shed light on human culture. This is a classic, classic error in science journalism. It comes out of the fact that our editors tend to tell us "Make it have a human interest side."