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TIL that Arthur Conan Doyle was the first person to advance the theory that Jack the Ripper committed his murders whilst dressed as a woman.

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D15Pj TIL that New York City is one of four major cities in the United States whose drinking water is pure enough not to require purification by water treatment plants. The city is supplied with drinking water by the protected Catskill Mountains watershed.
ErgW TIL Margret Sanger, the founder of Planned Parenthood, said: “that abortion was the wrong way — no matter how early it was performed it was taking a life; that contraception was the better way, the safer way…because life had not yet begun.”
xVE6B TIL that Antonie Leeuwenhoek improved upon the microscope in 1670 so he could look at fabric but began looking at microorganisms instead becoming the father of microbiology.
ovkA TIL that there are 4 competing theories on why shower curtains blow inward when taking a shower
OGZo1 TIL that after John Lennon's murder, Keith Richards, who was a few miles south of the Dakota at the time, got his own gun and was searching through the streets for the killer