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TIL In 1967, US president Lyndon Johnson secretly ordered a study that concluded he would die at age 64. He died of a heart attack in 1973 at age 64.

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jrvX TIL The Mongol Conquests in the 13th and 14th centuries killed over 17% of the world population, far more than any other conflict or conquest in human history
J1R4B TIL that in Old English "deer" described any animal. As language evolved, the meaning changed and narrowed until it started to describe only one type of animal. It's a change unique to English and Scots, as "deer" (tier, djur, dyr, dier, etc.) still means animal in all other Germanic languages.
ReXj TIL the T-shirt was invented in 1904 and marketed to bachelors who couldn’t sew or replace buttons
9wVGr TIL 87 percent of teens in the USA have an ‌iPhone‌, while 88 percent expect an iPhone‌ to be their next phone according to a survey from investment firm Piper Sandler.
epK7J TIL that beer changed statistics. W.S. Gosset was a scientist for Guinness Beer checking samples of ingredients against a standard. Adapting the normal distribution into a t-distribution allowed for fewer samples. He published it under the pseudonym “Student”, so was known as the Student's t-test.