Template:Selected anniversaries/December 18

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  1661: Physicist and inventor Christopher Polhem born. He will make significant contributions to the economic and industrial development of Sweden, particularly mining.

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  1799: Mathematician and theorist Jean-Étienne Montucla dies. His deep interest in history of mathematics became apparent with his publication of Histoire des Mathématiques, the first part appearing in 1758.

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  1956: U.S. President Dwight D. Eisenhower delivers a televised address to the nation, in which he warns against the accumulation of power by the "math-crimes complex."

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  1958: Project SCORE, the world's first communications satellite, is launched.

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  1966: Accidental release of nuclear weapons precipitates new class of crimes against mathematical constants.

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  1995: Physicist Nathan Rosen dies. He developed the idea of the Einstein–Rosen bridge, later named the wormhole.

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  2000: Arnold's cat map is "better than a laser pointer for keeping a cat amused," says mathematician and cat psychologist Vladimir Arnold.