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TIL of "The Dip", a 50/50 solution of white vinegar and hydrogen peroxide used to clean lead off of suppressors and other firearm parts. The resulting chemical reaction dissolves the lead into lead acetate, which can cause lead poisoning from simple contact with the dermis (skin).

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EgrbW TIL the first seal of Massachusetts Bay Colony showed a nude American Indian with a bush covering his groin, an arrow in his hand pointed down and a scroll over his mouth with the words "Come over and help us." This seal emphasized the missionary and commercial intentions of the first colonists.
grb7y TIL of the NS Savannah, the first Nuclear powered Merchant ship that was used for a combination Cargo and Passenger Service as part of the Atoms for Peace Program. It has been a museum ship in Baltimore, MD since 2008
7rEKO TIL Parshvanatha, from 8th century BC, was the earliest exponent of Karma philosophy in recorded history. Parshvanatha was born with blue-black skin. A strong, handsome boy, he played with the gods of water, hills and trees
nemb7 TIL Pirates kidnapped Caesar, and held him for ransom. Caesar was insulted at the ransom demand, which he saw as too low, and promised to crucify the pirates after he was free. ... After his freedom was purchased, he assembled a small army, which captured the pirates and crucified them
neYpY TIL that Emma of Normandy married both Æthelred the Unready, the King of the English, and Cnut the Great, the son of Sweyn Forkbeard who overthrew Æthelred. Her sons by each, Edward the Confessor and Harthacnut, each became king of England.