Why Can't a Man Be More Like a Woman?: The Evolution of Sex and Gender

How different are men and women, really? Controversy surrounds the question and makes uncovering the answers—based in evolution, genetics, and biology—increasingly difficult. Still, significant differences between the sexes are apparent everyday to both men and women. Whether it’s a boyfriend’s infidelity or a wife’s inability to orgasm during sex, the differences between the sexes affect how we act, interact, and think about one another. Developmental biologist Lewis Wolpert has devoted ye...