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TIL in 1940, a 14 year old Fidel Castro wrote a letter to U.S. President Franklin D. Roosevelt asking "If you like, give me a ten dollars bill green American, in the letter, because never, I have not seen a ten dollars bill green American and I would like to have one of them."

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JOVj TIL in 2006 a temporary second moon (mini-moon ) was found orbiting the earth till June 2007 and is expected to be recaptured by the earth later in this century.
Z8ZEQ TIL that the melody to the medieval English folk song "Nottamun Town" was considered lost to history until musicologists found isolated, illiterate, populations in Appalachia singing the song with a common melody and lyrics.
YpdOB TIL the word "dunce" comes from "Dunses"- followers of John Duns Scotus, a highly respected 13th century Scottish Scholastic theologian and philosopher who was beatified by Pope John Paul II in 1993.
e0yWg TIL Frederick Banting discovered insulin in 1923, he refused to put his name on the patent. He felt it was unethical for a doctor to profit from a discovery that would save lives. Banting's co-inventors, James Collip and Charles Best, sold the insulin patent to the University of Toronto for $1
LkAPZ TIL: A Harvard study found that graduate students are 3 time more likely to have depression than the average American. It suggest that this is due to doctoral students being overworked and underpaid and questioning "what is my purpose?"as most don't know when they have researched enough.