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TIL A Charlie Brown Christmas essentially killed the popularity of aluminum Christmas trees single-handedly. Within two years after its release, aluminum trees were no longer regularly manufactured.

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B7oW TIL- Benjamin Franklin is credited for the social innovation of “paying it forward”.
e0MGJ TIL of The Eleusinian Mysteries: Secret religious ancient Greek rites held annually for some two millennia (starting in 1600 B.C.) at the temple of Demeter. To this day, the controversy puzzles historians; all details were marked by a sworn oath of secrecy by the initiated and vanished through time.
8argL TIL that we don't know how the great French mathematician Adrien-Marie Legendre really looked like, because the only surviving portrait of him is an angry face in a caricaturist's work. For 200 years, the portrait of a French politician was wrongly attributed to him and used in old textbooks.
PnBn TIL Homeless children in the 90’s in Miami developed their own elaborate mythology.
neD6P TIL Scientists and mathematicians test higher on autism spectrum