May 13

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Better Than News

Are You Sure

• ... that physicist and chemist Marguerite Perey discovered the element francium, which is extremely radioactive, and which Perey hoped would help diagnose cancer; and that Perey is credited with championing better safety measures for scientists working with radiation; and Perey developed bone cancer which eventually killed her?

On This Day in Fiction and Nonfiction

Topic of the Day

Led Zeppelin