Template:Selected anniversaries/November 21: Difference between revisions

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||1783 – In Paris, Jean-François Pilâtre de Rozier and François Laurent d'Arlandes, make the first untethered hot air balloon flight.
||1783 – In Paris, Jean-François Pilâtre de Rozier and François Laurent d'Arlandes, make the first untethered hot air balloon flight.
||Gustav Roch (d. 21 November 1866) was a German mathematician who made significant contributions to the theory of Riemann surfaces in a career that ended when he died at the age of 26. Pic.


||1877 – Thomas Edison announces his invention of the phonograph, a machine that can record and play sound.
||1877 – Thomas Edison announces his invention of the phonograph, a machine that can record and play sound.

Revision as of 11:06, 4 February 2018