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TIL of Zeynab bint Al-Harith, a jewish woman who poisoned the Islamic Prophet Muhammad because he killed her entire family.

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nW4pB TIL about the Council of Appointment, a government body of NY that existed from 1777-1822. It was made up of the Governor and 4 state senators, and could appoint officials which weren't provided a means of selection by the Constitution. This included cabinet members, judges, and mayors.
kOJQe TIL that the ADE 651; an inert rod of metal with a plastic hinge, was sold as a bomb detector. It was used by the militaries of Iraq, Afghanistan and more than a dozen other countries for years before anyone noticed that it did nothing at all.
PBnZ TIL Dolly Parton created the Imagination Library, which sends one free book per month to a child, to boost literacy and foster a love of reading. Founded to serve her native Sevier County TN, it now ships over a million books a month to kids in the US, UK, Canada, and Australia.
6EBk7 TIL that WD-40 has never been patented as patenting would force them to disclose their recipe.
4XoM6 TIL that many female workers at Ravensbrück concentration were forced to produce army uniforms for the Nazis. They deliberately sabotaged them. An example of this is that they made the heels of socks too narrow or defective. This gave soldiers painful blisters on their feet.