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TIL that the only known portrait of the famous mathematician Adrien-Marie Legendre is a caricature, and the only other depiction was discovered in 2005 to be a portrait of another Legendre.

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XEWNj TIL When building the Trevi Fountain, Nicola Salvi ensured to add an urn on the right before he died. This was to block an “unsightly” barbershop whose owner had been continuously critiquing the work.
RkP8 TIL a sample of Sir Isaac Newton’s apple tree was sent into space to ‘defy gravity.’
KYE7G TIL At age 90, Hugh Hefner's weight dropped to 90lbs and he made visitors sign a confidentiality agreement to see him. He was so sick that he missed his own Playboy Mansion parties and always needed a group of nurses everywhere
DVEg TIL A nurse was in vegetative state for 42 years after sexual assault while the perpetrator was out of prison in 14 years. She recently died.
1arX TIL in Denmark there is a mobile sand dune that has been left unmanaged to allow future generations to understand the problems it presents.