Guirandana de Lay

Executed in 1461, Spanish healer Guirandana de Lay was a typical example of a witch hunt victim, who were often used as scapegoats for illness and other woes.

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Dr Marian Diamond

Marian Diamond is considered one of the founders of modern neuroscience, not least for her experimental discovery of brain plasticity—the fact that the brain physically changes with experience.

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Marian Farquharson

In 1885, Marian Farquharson was elected as the first female fellow of the Royal Microscopical Society—but as a woman she was still prohibited from actually attending any meetings or voting on society matters.

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Marian Koshland

Immunologist Marian Koshland is known for discovering that the differences in antibodies’ amino acid make-up explain how efficient and effective they are at fighting off foreign elements.

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Dr Martha Chase

Conducted by Martha Chase and Alfred Hershey, the Hershey-Chase experiment earned the Nobel Prize in Physiology or Medicine in 1969—not for Chase, but for Hershey.

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Dr Marthe Gautier

Marthe Gautier was studying Down Syndrome when she noticed an extra chromosome while studying cell samples from a patient. Due to her poorly equipped lab—she had only a low-power microscope—she couldn’t identify or photograph the chromosome.

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Fang

Fang, who lived during the first century BCE, was the earliest recorded woman alchemist in China. She reputedly discovered a way to turn mercury into silver—one interpretation is that she used a chemical technique to extract silver from ores using mercury.

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