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TIL the Majority of Millennials and Gen Z use subtitles when streaming TV

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oBK4o TIL Obsidian can be made into surgical scalpels by flint knapping, creating an edge only one molecule wide and the edge is so smooth and sharp it can cut between cells.
GAyE7 TIL: Ben Franklin was a slaveowner for much of his life, but after a friend took him to visit a school for black children, he wrote that African ignorance was not inherently natural but came from lack of education, slavery and negative environments. He also petitioned Congress to end slavery.
mEnR TIL Women don’t have a higher pain threshold than men, and that at a biological level both are the same.
XEWNj TIL When building the Trevi Fountain, Nicola Salvi ensured to add an urn on the right before he died. This was to block an “unsightly” barbershop whose owner had been continuously critiquing the work.
j6Pmj TIL that the Royal Hospital Chelsea derives its name from the archaic meaning of hospital, which is a place of hospitality and rest, and is an almshouse (charitable housing) for British Army veterans rather than a medical facility