October 19

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Better Than News

Beyond Plausible

In Other Words

Are You Sure

• ... that physicist and chemist Marguerite Catherine Perey (19 October 1909 – 13 May 1975) discovered the element francium by purifying samples of lanthanum that contained actinium; and that Perey was the first woman to be elected to the French Académie des Sciences (1962), an honor denied to her mentor, Marie Curie?

Topic of the Day

Books