Template:Selected anniversaries/October 21: Difference between revisions

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||2005 – Images of the dwarf planet Eris are taken and subsequently used in documenting its discovery by the team of Michael E. Brown, Chad Trujillo, and David L. Rabinowitz.
||2005 – Images of the dwarf planet Eris are taken and subsequently used in documenting its discovery by the team of Michael E. Brown, Chad Trujillo, and David L. Rabinowitz.
||George Daniels (d. 21 October 2011) was a British horologist who was considered to be the best in the world during his lifetime. He was one of the few modern watchmakers who built complete watches by hand (including the case and dial). But it was his creation of the coaxial escapement for which he is most remembered. The movement, which removed the need to add a lubricant, has been used by Omega in their highest-grade watches since 1999. Pic. https://en.wikipedia.org/wiki/George_Daniels_(watchmaker)


File:Green_Spiral_9.jpg|link=Green Spiral 9 (nonfiction)|2017: ''[[Green Spiral 9 (nonfiction)|Green Spiral 9]]'' feels more green than ever, according to new [[Chromatography (nonfiction)|chromatographic survey]].
File:Green_Spiral_9.jpg|link=Green Spiral 9 (nonfiction)|2017: ''[[Green Spiral 9 (nonfiction)|Green Spiral 9]]'' feels more green than ever, according to new [[Chromatography (nonfiction)|chromatographic survey]].

Revision as of 15:50, 6 July 2018

  • 1687: Mathematician and theorist Nicolaus I Bernoulli born. He will introduce a successful resolution to the St. Petersburg paradox.

    1687: Mathematician and theorist Nicolaus I Bernoulli born. He will introduce a successful resolution to the St. Petersburg paradox.

  • 1914: Mathematics and science writer Martin Gardner born. His interests will include stage magic, scientific skepticism, philosophy, religion, and literature.

    1914: Mathematics and science writer Martin Gardner born. His interests will include stage magic, scientific skepticism, philosophy, religion, and literature.

  • 1958: National Pareidolia Day declared in the United States.

    1958: National Pareidolia Day declared in the United States.

  • 1969: Mathematician and academic Wacław Sierpiński dies. He made important contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions, and topology.

    1969: Mathematician and academic Wacław Sierpiński dies. He made important contributions to set theory (research on the axiom of choice and the continuum hypothesis), number theory, theory of functions, and topology.

  • 2017: Green Spiral 9 feels more green than ever, according to new chromatographic survey.

    2017: Green Spiral 9 feels more green than ever, according to new chromatographic survey.

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