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TIL Helen Keller was one of the co-founders of American Civil Liberties Union (ACLU) and met 13 US presidents in her lifetime.

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1aXMr TIL of Betty Ong, a flight attendant aboard American Airlines Flight 11. Ong notified the American Airlines ground crew of the hijacking, staying on the telephone for 25 minutes and relaying vital information that eventually led to the closing of airspace by the FAA for the first time in history.
OoW76 TIL about the Expulsion of the Acadians, the forced removal by the British of the Acadian people who refused to sign an unconditional oath of allegiance to Britain during the French and Indian War. Many settled in Louisiana. The French word "Acadien" evolved and was anglicized as the word "Cajun".
wLDao TIL 20-50% of hypothermia fatalities are due to paradoxical undressing, or removing clothes due to disorientation.
oNL8 TIL during whaling times, a pod of orcas in Southern Australia would notify whalers of the presence of baleen whales, and assist in the kill in return for the lips and tongue.
8Z6G TIL IKEA Food is one of the largest food chains in the world. In 2016. IKEA served some 650 million diners a year, across 48 countries around the world. IKEA Food had annual sales of about $1.8 billion in 2016.