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TIL the term "butterfly effect" in chaos theory might have its origins in a 1952 Ray Bradbury short story. In it, a time-traveler travels back 66 million years where he accidentally crushes a butterfly, resulting in an altered timeline observed upon his return.

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Mek8a TIL scientists confirmed that having a younger or older sister makes you a better person. A 2010-study, which involved 400 families with siblings at the age of 10 – 14, indicated that having a sister positively affected the mental well-being of the siblings.
a8g60 TIL Oscar De Priest was the only african-american congressman during this three terms in congress from Illinois 1929 to 1935. He was the first black congressman from outside the south, and the first to be elected to congress in the 20th century.
x0xk TIL that Coca-Cola bottled in Cleveland, OH never switched to high-fructose corn syrup, they have always used natural sugar.
e0GJE TIL that Pop Its were invented by a former classmate of Anne Frank, inspired by imagining "a large field of breasts, that you can push the nipple" from one side to the other
1akoO TIL the first known appearance of the phrase "Taco Tuesday" is in the October 16, 1933, edition of the El Paso Herald-Post, in an advertisement for the White Star Cafeteria at the St. Regis Hotel.