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TIL The Happy Birthday song wasn't made public domain until 2016

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Amgw TIL: “Generational Curses” may be a real thing. There was a study where mice were given a small shock to the foot at the same time as the smell of acetophenone. After 10 days, they mated. The children mice inherited a fear of the odor even though they had never been exposed to it before.
R5pNQ TIL that MI5 were brought in to investigate rumours, that American actress Tallulah Bankhead was having inappropriate relations with Eton school boys in the 1920’s.
VM44G TIL, The Band AC/DC is referred to as "Accadacca" in their home country of Australia
8Dd8 TIL that the Prairie Vole (a rodent) is monogamous, while its closest relative the Montane Vole is promiscuous. The ADH receptor gene between the two species is different and cause different behavior. The same gene was injected into a laboratory mouse that showed monogamous behavior afterwards.
EgvOW TIL that wild flocks of rose‑ringed parakeets have thrived in and around London since the 1960s, after escaping or being released as exotic pets.