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TIL - 'Jeopardy' players aren't allowed to make wagers referencing sex, Nazis, or Satan

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ADyDn TIL in 2006 DNA evidence from the saliva on the letters Jack the Ripper sent to the police were identified as female suggesting the killer may have been Mary Pearcey who was later executed for a different murder.
J1l8j TIL that Las Vegas people originated in 8000 BCE and were among the earliest farmers in the Americas
69NdQ TIL: the sports rating system ELO, most seen in competitive chess, isn't an acronym but the last name of it's inventor, the Hungarian Arpad Elo (1903-1992). He came up with a more fair rating based on the then current one. Other sports use it well, often with minor tweaks and naming.
kJYMW TIL A working class neighbourhood in Zurich became a red-light district in the 1970s. As more people left their villages and moved to the city, it was easier and more profitable to rent out small apartments to prostitutes rather than use them as housing
ANkOB TIL singer songwriter Leonard Cohen claimed to have written approximately 150 draft verses of his most famous song "Hallelujah", a claim substantiated by his notebooks containing manifold revisions and additions, and by contemporary interviews.