September 25

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Better Than News

Are You Sure

... that mathematician and astronomer August Ferdinand Möbius discovered the Möbius strip, a non-orientable two-dimensional surface with only one side when embedded in three-dimensional Euclidean space?

• ... that Lieutenant Colonel Stanislav Yevgrafovich Petrov (1939–2017) of the Soviet Air Defense Forces who became known as "the man who single-handedly saved the world from nuclear war" for his role in the Soviet nuclear false alarm incident on 26 November 1983?

On This Day in Fiction and Nonfiction

Topic of the Day

Perfumes