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TIL Black Americans started America's first ever fully trained ambulance services staffed by paramedics. It began with Freedom House Ambulance Service...

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ANZll TIL while struggling to sell stories as a writer, George RR Martin capitalized on the early 1970s chess craze (due to Bobby Fischer's win) and was a tournament director for the Continental Chess Association.
Zpa1v TIL that domestic dogs have developed muscles in there brow to "mimic" humans
b9oPp TIL 1 in 5 organ donations comes from the victim of a vehicular accident, and self-driving cars may end up exacerbating the shortage.
epenL TIL : An Indian sub required 10 months of repair because someone left a hatch open.
KOMLR TIL after losing automatic control of his Mercury capsule, astronaut Gordon Cooper was forced to use his knowledge of constellations, wristwatch, and his eyeballs to manually land his spacecraft. He ended up splashing just 4 miles from his recovery ship, the most accurate landing up to that point.