Template:Selected anniversaries/April 21: Difference between revisions

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File:Mark Twain by Abdullah Frères, 1867.jpg|link=Mark Twain (nonfiction)|Writer, entrepreneur, publisher and lecturer [[Mark Twain (nonfiction)|Mark Twain]] dies (1910).
File:Petrus Apianus.jpg|link=Petrus Apianus (nonfiction)|1552: Mathematician and astronomer [[Petrus Apianus (nonfiction)|Petrus Apianus]] dies. His works on cosmography, ''Astronomicum Caesareum'' (1540) and ''Cosmographicus liber'' (1524), were extremely influential in his time.
File:Omar Khayyam.jpg|link=Omar Khayyam (nonfiction)|[[Omar Khayyam (nonfiction)|Omar Khayyam]] invents new class of [[Gnomon algorithm]] which antipates the work of [[Mark Twain (nonfiction)|Mark Twain]].
 
File:Jean Baptiste Biot.jpg|link=Jean-Baptiste Biot (nonfiction)|1774: Physicist, astronomer, and mathematician [[Jean-Baptiste Biot (nonfiction)|Jean-Baptiste Biot]] born. He will establish the reality of meteorites, make an early balloon flight, and study the polarization of light.
 
File:Hannibal Goodwin.jpg|link=Hannibal Goodwin (nonfiction)|1822: Priest and inventor [[Hannibal Goodwin (nonfiction)|Hannibal Goodwin]] born.  He will invent and patent rolled celluloid photographic film.
 
File:Waking the Slate.jpg|link=The Waking of the Slate|1900: '''[[The Waking of the Slate]]''' ceremony is louder than ever.
 
File:Loch_Ness_Monster_Surgeon's_photograph.jpg|link=Loch Ness Monster (nonfiction)|1934: The "Surgeon's Photograph", the most famous photo allegedly showing the [[Loch Ness Monster (nonfiction)|Loch Ness Monster]], is published in the Daily Mail. (It will be revealed as a hoax in 1999.)
 
File:Edward_Victor_Appleton_(1947).jpg|link=Edward Victor Appleton (nonfiction)|1965: Physicist and academic [[Edward Victor Appleton (nonfiction)|Edward Victor Appleton]] dies. Appleton made pioneering contributions to radiophysics, and was awarded the Nobel Prize in Physics in 1947 for his seminal work proving the existence of the ionosphere during experiments carried out in 1924.
 
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Latest revision as of 08:36, 11 November 2024

  • 1552: Mathematician and astronomer Petrus Apianus dies. His works on cosmography, Astronomicum Caesareum (1540) and Cosmographicus liber (1524), were extremely influential in his time.

    1552: Mathematician and astronomer Petrus Apianus dies. His works on cosmography, Astronomicum Caesareum (1540) and Cosmographicus liber (1524), were extremely influential in his time.

  • 1774: Physicist, astronomer, and mathematician Jean-Baptiste Biot born. He will establish the reality of meteorites, make an early balloon flight, and study the polarization of light.

    1774: Physicist, astronomer, and mathematician Jean-Baptiste Biot born. He will establish the reality of meteorites, make an early balloon flight, and study the polarization of light.

  • 1822: Priest and inventor Hannibal Goodwin born. He will invent and patent rolled celluloid photographic film.

    1822: Priest and inventor Hannibal Goodwin born. He will invent and patent rolled celluloid photographic film.

  • 1900: The Waking of the Slate ceremony is louder than ever.

    1900: The Waking of the Slate ceremony is louder than ever.

  • 1934: The "Surgeon's Photograph", the most famous photo allegedly showing the Loch Ness Monster, is published in the Daily Mail. (It will be revealed as a hoax in 1999.)

    1934: The "Surgeon's Photograph", the most famous photo allegedly showing the Loch Ness Monster, is published in the Daily Mail. (It will be revealed as a hoax in 1999.)

  • 1965: Physicist and academic Edward Victor Appleton dies. Appleton made pioneering contributions to radiophysics, and was awarded the Nobel Prize in Physics in 1947 for his seminal work proving the existence of the ionosphere during experiments carried out in 1924.

    1965: Physicist and academic Edward Victor Appleton dies. Appleton made pioneering contributions to radiophysics, and was awarded the Nobel Prize in Physics in 1947 for his seminal work proving the existence of the ionosphere during experiments carried out in 1924.

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