The Colorado seventh-grader was unimpressed by the options her parents had to test water in their home. So she created a sensor-based device using chemically treated carbon nanotubes to do it faster.
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Ida Laura Pfeiffer
Starting her travels at 45 years old, this globetrotter became a worldwide sensation for going boldly where no woman had gone before.
Mythological Irish princess who was turned into a worm, butterfly, and a pool of water; who induced the strangest pregnancy since Jesus; and who may hold the key to understanding Ireland's history.
When her husband was killed in WW2, she sold all their belongings, bought a tank, named it Fighting Girlfriend, and started killing Nazis.
Cross-dressing Queen of Thieves who flouted social norms and had plays written about her.
Juana Azurduy de Padilla
This revolutionary (and mother of five) should have been the namesake of Bolivia - and that's the opinion of Simon Bolivar, the actual namesake of Bolivia!
This Sikh warrior saint led 40 deserters back into battle and in so doing, possibly saved her entire religion from extinction.
When her brother was killed, this pharaoh took her time cooking up revenge.
Viking princess who decided she'd rather be a pirate than get married.
Marsha P. Johnson
This cheery godmother of trans civil rights masked a dark past of abuse.
In 1915, this rowdy Puerto Rican activist was arrested for wearing pants in public. It wouldn't be the last time she wore pants, or got arrested.