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TIL That the term "Chinese fire drill" actually refers to both a fire drill and a confused Chinese crew on a British ship in the 20th century. Instructions were mis-translated and chaos reigned

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PYWBE TIL the Klingons were created by screenwriter Gene L. Coon, and first appeared in the Star Trek episode "Errand of Mercy" (1967). They were named after Lieutenant Wilbur Clingan, who served with Star Trek creator Gene Roddenberry in the Los Angeles Police Department
DWEj TIL 70% of African-American children and 58% of Hispanic children do not know how to swim compared to 40% white children.
KOA4E TIL Semantic satiation (also semantic saturation) is a psychological phenomenon in which repetition causes a word or phrase to temporarily lose meaning for the listener, who then perceives the speech as repeated meaningless sounds.
mxNYy TIL that Swedish blood banks texts donors to notify them whenever their blood helps save a life.
XE0ak TIL, in Danish mythology, there is a group of Ravens called the Valravn that ate a kings heart and gained human integrative and supernatural abilities, which they used to perform malicious acts