Sex is not binary either. Intersex athletes exist too and are not as rare as you may imagine. Here's a more notable recent example of the controversy of delin

Sex is not binary either. Intersex athletes exist too and are not as rare as you may imagine. Here's a more notable recent example of the controversy of delineating by sex: https://en.wikipedia.org/wiki/Caster_Semenya https://en.wikipedia.org/wiki/Caster_Semenya Likely there were always intersex athletes who had advantages, but only the relatively recent anti doping and medical examinations would reveal them.