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TIL about Placobdelloides jaegerskioeldi; a leech known as the Hippo Butt Leech who spends its life attached to the rectums of hippos

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Oo4EY TIL there is a subgenre of Irish Folk Songs concerning the American Civil War. Around 200k Irishmen fought in the war, 90% of which fought for the Union.
MVPa TIL that the word ACME commonly found in Looney Tunes shows stands for “A Company (that) Makes Everything”
kOng1 TIL Fascist Dictator Benito Mussolini was part of the Italian Socialist Party during WW1 before being expelled.
GJk1 TIL that caffeine isn’t a stimulant and it doesn’t ‘give you energy’, rather it blocks the adenosine receptors in your brain - which would normally build up to make you feel tired.
Eadx TIL That Captain Underpants has twice topped the list of banned books in America