(eon)

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Leon theremin really deserves some more credit for inventing such a cool ass instrument
léon theremin
My upcoming article about Léon Theremin at will be postponed for the future... Why? Personal matters.
I learned about the Great Seal/The Thing from this article, though, a bugging device designed by Leon Theremin, which is good trivia.
The theremin is an electronic musical instrument. It was invented in 1919 by a Russian physicist Leon Theremin.