80 years ago all vets were men. How can men's biology change so fast? 150 years ago elementary school teachers were men. In 1984 more than 35% of CS majors were

80 years ago all vets were men. How can men's biology change so fast? 150 years ago elementary school teachers were men. In 1984 more than 35% of CS majors were female. Not long enough for genetic change.