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X0gEQ TIL, that there is a sea slug species where one sexual partner injects the other one it's prostate fluid to it's head.
QPvX TIL that selective breeding creates language barriers in dogs and makes it harder for them to communicate and socialize normally. [i.e., if Fluffy keeps getting into fights at the dog park, this might be why.]
gMlOD TIL that Mussolini built a huge marble victory arch in the middle of the Libyan desert, considered a sign of Italian Colonialism Muammar Gaddafi had it blown up when he came to power.
VMDa4 TIL when Sharon Tate was murdered by the Manson Family in 1969, Roman Polanski briefly suspected Bruce Lee of having committed the murder, due to a pair of eyeglasses found at the crime scene followed by a comment Bruce Lee made to Roman Polanski about how he had lost his own eyeglasses.
X0vwX TIL that radium passivates by forming a nitride film, unlike most metals, which form an oxide film