The Binary Delusion: How Biology Defies the Myth of Two Sexes

A human physiology expert lays out the basic facts to explain why the idea of biological sex as a binary is simply wrong

Biological sex is as nuanced as gender. Many of us are biologically more typically masculine in some ways and more typically feminine in others. The constellation of traits that make up our sex identity are wide-ranging and often overlap. Height, strength, body hair, genitalia, hormonal balances—these are all part of the picture. How should we think about this kind of vari...