Template:Selected anniversaries/June 13

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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.

    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.

  • 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%.

    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%.

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

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

  • 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.

    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.

  • 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.

    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.

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

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

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

    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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