In high school, Isabella Karle had to take a science class to fulfill a prerequisite. She chose chemistry at random. Karle would go on to become one of the most important chemists of her time, doing groundbreaking research in the field of X-ray crystallography. Her discoveries in the mid 1950s are a key reason many modern-day pharmaceuticals are available on pharmacy shelves. But Karle’s collaborator–her husband, Jerome–would eventually receive the Nobel Prize in Chemistry for work Isabella also achieved. 

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