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TIL that the borders of 10 different municipalities converge at the summit of Mount Etna in Sicily

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oJ1R TIL Louis Braille, inventor of the system of reading and writing for use by the blind or visually impaired, created the raised-dot system by using an awl, the same kind of implement which had blinded him at the age of three.
a8OwA TIL the term "skunkworks" does not mean what I thought it meant. It does NOT mean a project with no upper management support, but rather it's when a small team, seaparate team is formed to develop a particular thing. The team itself is usually well funded but outside organisational bureaucracy.
xVjEo TIL The introduction of iodine in table salt by the Morton Salt Company raised average IQ in the U.S. by 3.5 points
E4Pw TIL that in 1980, Lake Peigneur disappeared into a salt mine due to a triangulation error of a drill site. Video footage exists of the lake sucking in barges and other things.
0yly TIL that in 1955, Miles Davis had surgery to remove polyps on his larynx and was told not to talk for 2 weeks.During that time, he got into an argument with an executive and heard his voice fade to a croak in mid-tirade, damaging his vocal cords giving him his raspy whisper that he became known for.