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TIL The famous musician Sir Paul McCartney can neither read or write music

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PY9pV TIL that in 1987 Steve Rothstein took advantage of the AAirpass (a promotion by American Airlines that let people pay a one time $250,000 and have a lifetime of unlimited flights) and quit his job so he could fly continuously. This ended up costing the airline more than 21 million.
LQJAQ TIL that the pigment "Indian yellow" was historically made from the dried piss balls of cows fed primarily on mango leaves
QBm9 TIL that pupils dilate when multiplying two two-digit numbers.
aW79 TIL that as China’s economy and average income skyrocket, the levels of personal happiness and personal satisfaction are dropping at about the same rate.
R5Jm8 TIL the bacteria Listeria Monocytogenes evades the immune system by hijacking the cells skeleton and using it to blast around like a rocket.