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TIL of brain stimulation reward, manually stimulating specific parts of the brain to elicit pleasure and happiness. A volunteer subject in 1986 spent days doing nothing but self-stimulate. She ignored her family and personal hygiene and she developed an open sore on her finger from using the device.

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0dJQv TIL : Cockroaches are pretty good parents! "The cockroach parenting method—which includes feeding, guarding and keeping their young very close—has served the insects for at least 125 million years."
VMrKG TIL: Historically, monarchs in East Asia would use two alternative titles: internally they claimed to be “emperors”, but in dealing with China they called themselves “kings” to avoid offending the Chinese.
K4g6 TIL when Seal Team Six was founded, there were only two other Seal teams. Richard Marcinko purportedly named the unit SEAL Team Six in order to confuse other nations, specifically the Soviet Union, into believing that the United States had at least three other SEAL teams that they were unaware of.
N7kVe TIL The actor Masayori Oka who played Hiro Nakamuro on The TV show Heroes is the founder of Mobius Digital games, the developer of Outer Wilds
QJOg9 TIL that in 1937 a massive demand for sulfa, the first and only effective broad-spectrum antibiotic available before penicillin, and nonexistent testing requirements led to a mass poisoning with over 100 deaths. This led to the passage of the Federal Food, Drug, and Cosmetic Act in 1938.