November 21, 1877 (143 years ago): Thomas Edison announces his invention of the phonograph, a machine that can record and play sound.
#backintime #otd #1800s #thomasedison #history
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November 21, 1877 (143 years ago): Thomas Edison announces his invention of the phonograph, a machine that can record and play sound.
#backintime #otd #1800s #thomasedison #history
