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http://commons.wikimedia.org/wiki/File:Inscribed_square.svg

Does every closed curve contain the vertices of a square?

No one knows.

March 22, 2012March 21, 2012 | Science & Math

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Futility Closet is a collection of entertaining curiosities in history, literature, language, art, philosophy, and mathematics, designed to help you waste time as enjoyably as possible.

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