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TIL about the “Cornerstone Speech”, in which the Vice President of the Confederacy stated that the perpetuation of slavery was the primary goal and purpose of secession from the Union

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yQbEV TIL honeybees sleep between five and eight hours a day, some bees hold each other's legs as they sleep. Colonies are divided into different sectors of work. There are cleaners, nurses, security guards, also collection bees whose sole job is to cache nectar in comb. Promotions happen as well.
6EW8w TIL: Nazis abducted 200,000 Polish children claiming some were the descendants of Germans that had emigrated to Poland. Those evaluated as "Aryan-looking” were adopted by German families; some grew up believing they were German. Only 20% are estimated to have reunited with their families post-war.
6EJMQ TIL: The Blue Ringed Octopus is both venomous and poisonous thanks to the neurotoxin Tetrodotoxin
rNEPy TIL that in 1894 the U.S. Army killed 30 American citizens during the Pullman Strike. Union organizer and future socialist presidential candidate Eugene V. Debs was called "an enemy of the human race" in a New York Times editorial, and imprisoned for mail obstruction.
EgJbd TIL primates are the only animals that get a rash from poison ivy.