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TIL That The Star-Spangled Banner was originally a British drinking song

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via reddit.com

BgOjL TIL that the dye used in pathology labs to stain cells, Eosin, was based on a pigment found in the campeche tree in Mexico. The red dye was used by Indigenous Americans to dye their textiles for centuries before European arrival; the idea was stolen and taken back to Europe in the 1500s.
gae7 TIL that prior to the explosion in worldwide sushi consumption, bluefin tuna were considered so worthless that they were often used for cat food.
woJY6 TIL that one of Portugal's most important writers was given the wrong surname at birth, being called by a local shrub instead of his family name.
x940 TIL Helsinki, Finland has a four-times-a-year event called Restaurant Day. The occasion offers anyone the opportunity to set up a restaurant, café, or bar, for just one day, without having to apply for official permits – as long as alcohol is not on the drinks list.
x6rW0 TIL the legendary “DJ, turn it up!” in Ke$ha’s We R Who We R was totally improvised. Benny Blanco, the producer got super high, passed out for 24 hours, woke up in a panic with 30 minutes to deadline, and just slapped it on because Ke$ha had already left.