Template:Selected anniversaries/November 21: Difference between revisions
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||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. | ||
||1905 | File:Albert Einstein 1921.jpg|link=Albert Einstein (nonfiction)|1905: [[Albert Einstein (nonfiction)|Albert Einstein]]'s paper that leads to the mass–energy equivalence formula, E = mc², is published in the journal ''Annalen der Physik''. | ||
||1913 – Gunnar Kangro, Estonian mathematician, author, and academic (d. 1975) | ||1913 – Gunnar Kangro, Estonian mathematician, author, and academic (d. 1975) | ||
Revision as of 13:52, 16 November 2017
1652: Mathematician, physician, and astronomer Jan Brożek dies. He contributed to a greater knowledge of Nicolaus Copernicus' theories and was his ardent supporter and early prospective biographer.
1905: Albert Einstein's paper that leads to the mass–energy equivalence formula, E = mc², is published in the journal Annalen der Physik.