At 24, Alice Augusta Ball, a chemistry student at the University of Hawaiʻi, developed the first effective, injectable treatment for Hansen's disease AKA leprosy.
Alicia Thornton rode sideways, in a skirt, with no whip—and still beat the top jockey in England in front of a huge crowd. And we don’t even know the name of the first woman ever to race against men.
Bina Das was a young freedom fighter who took up arms against the British, attempting to assassinate the British Governor of Bengal, Stanley Jackson, when she was just 21.