She discovered what determines whether you’re born male or femaleโthen history e…
She discovered what determines whether you’re born male or femaleโthen history erased her name from the textbooks. Meet Nettie Stevens. A name you should know, but probably don’t. In 1905, in a cramped laboratory at Bryn Mawr College, Nettie Stevens peered through her microscope at mealworm cells and saw something no human had ever seen […]







