Template:Selected anniversaries/February 21: Difference between revisions

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File:Curie_and_radium_by_Castaigne.jpg|link=Radium (nonfiction)|1899: Marie and Pierre Curie use [[Radium (nonfiction)|radium]] to detect and expose [[crimes against physical constants]].
File:Curie_and_radium_by_Castaigne.jpg|link=Radium (nonfiction)|1899: Marie and Pierre Curie use [[Radium (nonfiction)|radium]] to detect and expose [[crimes against physical constants]].
||Charles Piazzi Smyth (d. 21 February 1900) was an English astronomer who was Astronomer Royal for Scotland from 1846 to 1888; he is known for many innovations in astronomy and his pyramidological and metrological studies of the Great Pyramid of Giza. Pic.


||György Hajós (b. February 21, 1912) was a Hungarian mathematician who worked in group theory, graph theory, and geometry.
||György Hajós (b. February 21, 1912) was a Hungarian mathematician who worked in group theory, graph theory, and geometry.

Revision as of 08:24, 6 July 2018

  • 1591: Mathematician and engineer Girard Desargues born. He will be one of the founders of projective geometry.

    1591: Mathematician and engineer Girard Desargues born. He will be one of the founders of projective geometry.

  • 1592: Canterbury scrying engine crashes, predicts faulty future; the resulting paradox will develop into an epidemic of capacitor failure by the early twenty-first century.

    1592: Canterbury scrying engine crashes, predicts faulty future; the resulting paradox will develop into an epidemic of capacitor failure by the early twenty-first century.

  • 1677: Philosopher, scholar, and lens-grinder Baruch Spinoza dies. He laid the groundwork for the 18th-century Enlightenment and modern biblical criticism, including modern conceptions of the self and the universe.

    1677: Philosopher, scholar, and lens-grinder Baruch Spinoza dies. He laid the groundwork for the 18th-century Enlightenment and modern biblical criticism, including modern conceptions of the self and the universe.

  • 1788: Scientist, inventor, and engineer Francis Ronalds born. He will be knighted for creating the first working electric telegraph.

    1788: Scientist, inventor, and engineer Francis Ronalds born. He will be knighted for creating the first working electric telegraph.

  • 1899: Marie and Pierre Curie use radium to detect and expose crimes against physical constants.

    1899: Marie and Pierre Curie use radium to detect and expose crimes against physical constants.

  • 1926: Physicist and academic Heike Kamerlingh Onnes dies. He received widespread recognition for his work, including the 1913 Nobel Prize in Physics for "his investigations on the properties of matter at low temperatures which led, inter alia, to the production of liquid helium".

    1926: Physicist and academic Heike Kamerlingh Onnes dies. He received widespread recognition for his work, including the 1913 Nobel Prize in Physics for "his investigations on the properties of matter at low temperatures which led, inter alia, to the production of liquid helium".

  • 1933: Alice Beta tells reporters that the rise of the Nazi party in Germany will lead to "new and unprecedently dangerous crimes against mathematical constants."

    1933: Alice Beta tells reporters that the rise of the Nazi party in Germany will lead to "new and unprecedently dangerous crimes against mathematical constants."

  • 1938: Astronomer and journalist George Ellery Hale dies. He discovered magnetic fields in sunspots, and was a leader or key figure in the planning or construction of several world-leading telescopes.

    1938: Astronomer and journalist George Ellery Hale dies. He discovered magnetic fields in sunspots, and was a leader or key figure in the planning or construction of several world-leading telescopes.

  • 1974: Film director and arms dealer Egon Rhodomunde privately advises White House aides H. R. Haldeman and John Ehrlichman that they "will both be sentenced to jail a year from today" for their roles in the Watergate scandal.

    1974: Film director and arms dealer Egon Rhodomunde privately advises White House aides H. R. Haldeman and John Ehrlichman that they "will both be sentenced to jail a year from today" for their roles in the Watergate scandal.

  • 1975: Watergate scandal: Former United States Attorney General John N. Mitchell and former White House aides H. R. Haldeman and John Ehrlichman are sentenced to prison.

    1975: Watergate scandal: Former United States Attorney General John N. Mitchell and former White House aides H. R. Haldeman and John Ehrlichman are sentenced to prison.

  • 2002: Capacitor plague affects several brands of portable envy devices.

    2002: Capacitor plague affects several brands of portable envy devices.

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