Science shows that a binary model for sex doesn't hold up to human variation.
In the battles between scientists and social justice activists, sometimes our democracy takes collateral damage.
Many of us probably get our core gender identities as much from our biological origins as we do from our gender educations.
Our bodies naturally create hundreds of hormones that are key to determining our athletic abilities. But the introduction of unnatural hormones raises important questions about how we define sex and gender.
Specialists have moved away from sex-changing baby males with small penises and recommending vaginoplasties in very young children as they become less phobic about sex atypical (but healthy) organs.
The Land Down Under has expanded the legal definition of gender.