WKOW 27: Madison, WI Breaking News, Weather and SportsThis day in history: November 21
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1789 - North Carolina ratifies the United States Constitution and is admitted as the 12th U.S. state.
1877 - Thomas Edison announces his invention of the phonograph, a machine that can record and play sound.
1905 - Albert Einstein's paper, "Does the Inertia of a Body Depend Upon Its Energy Content?" is published in the journal "Annalen der Physik". This paper reveals the relationship between energy and mass. This leads to the mass-energy equivalence formula E = mc².
1980 - A deadly fire breaks out at the MGM Grand Hotel in Paradise, Nevada (now Bally's Las Vegas). 87 people are killed and more than 650 are injured in the worst disaster in Nevada history.
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