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TIL: Of Dracula ants, so named because they suck the blood of their young in a process dubbed “nondestructive cannibalism,”

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vPje4 TIL of a machine lubricant called Thames Mud Butter, made from fats that were skimmed from the sewage effluent of late 19th century London.
DQLBD TIL following the Civil War an estimated one-third to one-half of circulating currency was counterfeit
wojAY TIL In 1998, Hyundai founder Chung Ju-yung sent 1001 cattle as a symbol of positive progress from South Korea to North Korea as humanitarian aid during a famine to promote peace and strengthen economic cooperation between the two countries. Sadly, many of them didn't survive the first winter season.
worP6 TIL that in the 19th Century, Rudolf Lindt, of the famous Lindt chocolate family, accidentally invented the crucial step of "conching" chocolate – rolling the warm cocoa mass to make it smooth and reduce its acidity – by leaving a cocoa mass mixer running overnight.
boZQ [TIL] Franklin D. Roosevelt sent a written plea to Adolf Hitler asking him to stop Germany’s aggressive advances in Europe. Hitler responded with a televised conference mocking each point FDR made in a speech that lasted over 2 ½ hours.