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TIL that before electrical and mechanical alarm clocks were common, working people used to hire "knockers-up" to wake them by banging sticks or shooting dried peas at their windows.

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GYpg7 TIL in 1962, jousting was declared as the official state sport of Maryland.
4kkM6 TIL about Ocular Herpes Simplex Keratitis. This is HSV of the eyes. While 1/3 of humans have genital HSV, about 1.4M people have OHSK. Also, Keratitis is the #1 cause of cornea-related blindness.
9YRXD TIL Isaac Asimov was an on-again, off- again member of MENSA. He drifted in and out of active membership due to some unpleasant members who were "brain-proud and aggressive about their IQs,"
e0Ymb TIL that a UK TV license costs £157.50. You get a 50% discount to £78.75 if you’re blind and have a colour TV, but a 66% discount to £53 if you’re fully sighted with a black and white TV.
D1Qgv TIL It takes thousands of years for light to escape the sun, then 8.3 minutes to reach earth. The sunlight we see is thousands of years old.