She helped discover arguably the most important drug in history. And she got zero credit. They called her Moldy Mary—but she turned that insult into triumph...

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"Moldy Mary," The Forgotten Mother of Penicillin

A topsy-turvy science-y history podcast by Sam Kean. I examine overlooked stories from our past: the dental superiority of hunter-gatherers, the crooked Nazis who saved thousands of American lives, the American immigrants who developed the most successful cancer screening tool in history, the sex lives of dinosaurs, and much, much more. These are charming little tales that never made the history books, but these small moments can be surprisingly powerful. These are the cases where history gets inverted, where the footnote becomes the real story.

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In 1959, nine Russian hikers mysteriously died on a trek through the snowy wilderness—fueling a half-century of hysterical conspiracies. Has science finally cracked the case?

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The Russian Roswell

After a tenure dispute, mechanical engineer Valery Fabrikant murdered four colleagues in cold blood at his university in Montreal. So why is he still allowed to publish scientific papers?

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When Tenure Means Life and Death

Chemist Justus von Liebig was perhaps the most famous scientist in the world in the mid-1800s—but quickly became infamous for his role in the killing of four starving infants.

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A Deadly Soup for Babies

Patient after patient died under the care of a single nurse in Holland. So why did so many statisticians think Lucia de Berk was innocent?

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How the “Worst Serial Killer in Holland’s History” Went Free

Rama IV of Siam (from the “King and I” musical) used an eclipse to save his kingdom from greedy colonial powers. But it cost him his own life in the end.

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"Moldy Mary," The Forgotten Mother of Penicillin

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