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url: https://www.nobelprize.org/prizes/physics/1903/marie-curie/facts/
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Marie Curie, a Polish-born physicist and chemist, became the first woman to win a Nobel Prize when she received the award in Physics in 1903. She shared the prize with her husband Pierre Curie and another scientist Antoine Henri Becquerel for their work on radioactivity. Later, in 1911, she won a second Nobel Prize, this time in Chemistry, making her the only person to win Nobel Prizes in two different scientific fields. 

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What scientific field did Marie Curie win her second Nobel Prize in?
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Marie Curie won her second Nobel Prize in the field of Chemistry.
Source:
url: https://www.nobelprize.org/prizes/physics/1903/marie-curie/facts/