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TIL In 1995, Nigeria donated 88 000 doses of meningitis vaccine to its neighbour Niger, but before the authorities realized that these vaccines were fake, about 60 000 people had been “inoculated” with what could just be water.

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Vd4G TIL that during production of the notoriously convoluted 1946 noir classic The Big Sleep, neither the director nor the screenwriters knew if a character was supposed to have commit suicide or been murdered, so they contacted the book’s author, Raymond Chandler, and he didn’t know either.
gM4n7 TIL that two fans of the Epcot ride Horizons spent months documenting it before its closure by jumping out of their vehicle dozens of times to explore the sets without anyone noticing.
MeGea TIL of Erik Weihenmayer, the only Blind person to have climbed the Seven Summits of every continent, and the first/one of the only Blind persons to climb Mt. Everest.
698xm TIL acacia trees are flat-topped so that their lowest leaves are at the height of the tallest herbivores. They're also covered in thorns, have organs for housing/feeding vicious ants, release inedible compounds into their leaves when eaten, and use ethylene gas to warn nearby trees of danger
1a5Nr TIL the reason we know what cyanide tastes like is because an Indian man, MP Prasad who committed suicide left a hastily scrawled note describing the taste. "Doctors, potassium cyanide. I have tasted it. It burns the tongue and tastes acrid," he wrote, solving a long unanswered question.