Template:Selected anniversaries/June 13

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  1508: Humanist and philosopher Alessandro Piccolomini born. Piccolomini will promote vernacular translations of Latin and Greek scientific and philosophical treatises.

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  1555: Mathematician, cartographer, and astronomer Giovanni Antonio Magini born. He will support a geocentric system of the world, in preference to Copernicus's heliocentric system.

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  1580: Astronomer and mathematician Willebrord Snellius born. In 1615 he will conduct a large-scale experiment to measure the circumference of the earth using triangulation, underestimating the circumference of the earth by 3.5%.

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  1629: Mathematician Pierre de Fermat uses scrying engine techniques to download award-winning children's book The Unruly Submarine.

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  1773: Polymath and physician Thomas Young born. Young will make notable scientific contributions to the fields of vision, light, solid mechanics, energy, physiology, language, musical harmony, and Egyptology.

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  1831: Physicist and mathematician James Clerk Maxwell born. His discoveries will help usher in the era of modern physics, laying the foundation for such fields as special relativity and quantum mechanics.

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  1854: Engineer and inventor Charles Algernon Parsons born. He will invent the compound steam turbine, and work on dynamo and turbine design, power generation, and optical equipment for searchlights and telescopes.

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  1931: Mathematician and academic Herbert Saul Wilf born. Wilf specialized in combinatorics and graph theory.

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  1946: Celebrated children's book The Unruly Submarine wins Caldecott Medal.

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  1947: Writer and philosopher Culvert Origenes publishes critical review of The Unruly Submarine, calls the award-winning children's book "a prelude to McCarthyism."

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  2017: Signed first edition of Embassy stolen from the Louvre in a daring broad daylight raid by agents of the Forbidden Ratio.