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Wladyslaw Skłodowski and his daughters (from left) Maria, Bronisława, and Helena. Maria became Marie Curie (1867-1934), a Polish-French physicist and chemist and multiple Nobel laureate. Her achievements include a theory of radioactivity (a term that she coined), techniques for isolating radioactive isotopes, and the discovery of two elements, polonium and radium. Photographed in 1890.
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