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TIL that Benjamin Lay, an early Quaker abolitionist, walked into the 1738 annual meeting of Quakers and during an abolition speech plunged a sword into a bible he had hollowed out and filled with a bladder full of red fruit juice. To horrified onlookers, the Bible appeared to be bleeding.

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Z8QL4 TIL that John Fiedler, the original voice of Piglet, died one day after Paul Winchell, the original voice of Tigger, in 2005.
PYRYL TIL when sonar was first invented, operators were puzzled by the appearance of a ‘false seafloor’ that changed depth with the time of day and amount of moonlight. It was eventually identified as a previously unknown layer of billions of lanternfish that reflect sonar waves and migrate up and down.
Y70Rv TIL hummingbirds, numbering about 340 species, are only found in the wild in North and South America. There are birds that drink nectar in Africa and Asia, and they are also small and colorful like hummingbirds, but they are called sunbirds.
RY1j TIL There is a physician who can look at a vinyl record and tell what song it is only based on the grooves.
OgOg TIL the US Navy maintains a research vessel that is designed to be capsized vertically. As a result, most rooms on it have two doors: one to use when the ship is horizontal, another when vertical.