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TIL that the terms “hooker” and “sideburns” were popularized and invented respectively during the Civil War. General Joseph Hooker’s army was known to party and hire prostitutes, while General Ambrose Burnside’s facial hair spoke for itself

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LE1m TIL that the “Man in the Iron Mask” was based on an actual prisoner in France who was held there for 34 years. He was never seen without a black velvet mask, and no one knows who he really was or why he always wore the mask.
4XeK6 TIL During the 1960 campaign, Kennedy learned that a group of Kenyan students who had won scholarships to study at American universities didn't have enough funds to come. When Eisenhower refused to intervene, JFK arranged to have the Kennedy family foundation underwrite their travel
l7PKN TIL: Researchers Joseph and Charles Vacanti grew a human "ear" seeded from implanted cow cartilage cells on the back of a living mouse to explore the possibility of fabricating body parts for plastic and reconstructive surgery
WRPN TIL in a housing experiment that involved moving families from poor neighborhoods to wealthier neighborhoods, boys experienced PTSD rates comparable to those of combat soldiers. Psychological well-being improved for girls.
OoRRg TIL In the US, if your scheduled arrival time to a destination is delayed by an airline (due to missteps on their part, such as overbooking), for more than 2 hours (domestic) or 4 hours (international), you are entitled to financial compensation of up to 400% of the one-way fare, capped at $1,550.