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TIL that dental cavities are usually filled with a mercury-based alloy. Dental offices typically disposed of the excess by pouring it down the drain, a practice that was only outlawed in the United States in 2017.

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wZNY TIL that wearing a white t-shirt with a large letter “T” on the front is scientifically proven to make you 10% more attractive to women
nNKo TIL that Psy last Gangnam Style proformance is New Years eve because blood clots are forming in his legs from his Gangnam dance
E180X TIL that "Taco Tuesday" isn't something just any restaurant can celebrate. It's trademarked by a Wyoming-based chain called Taco John's, which routinely sends cease-and-desist letters to other restaurants that use it.
R5Zvw TIL Thai people DO NOT traditionally use chopsticks, unless they’re eating Chinese food. Classic Thai dishes like red/green/yellow curry, pad Thai, pad see ew, drunken noodles, pad krapao and Thai fried rice are most authenticity eaten with a fork and spoon.
LQQKp TIL that the term "fundamentalism" was coined in 1920, and was named after a series of 12 Evangelical protestant pamphlets called " The Fundamentals: A Testimony to the Truth." The pamphlets argued that the Bible was the literal and inerrant word of God.