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TIL The first known case of mastitis (inflammation of the breast) dates back to the 5th century BCE. The specific case was when Empress Atossa of Persia had a mass successful exercised from her breast by the Greek slave Democedes.

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0w4NA TIL Scientology founder L. Ron Hubbard chose his son Quentin to succeed him after his eldest son quit the church. Quentin, who wanted to be a pilot and was gay (against doctrine), committed suicide. When his father discovered this, he shouted "That stupid fucking kid! Look what he's done to me!"
b9MN7 TIL that the katzenklavier ("cat piano") is a hypothetical musical instrument made out of cats. Designed by 17th-century scholar, Athanasius Kircher, it consists of a row of caged cats with different voice pitches. It is to be "played" by driving a nail into the cat's tail to make it yowl
0w9vR TIL That chickens are used to detect diseases that spread via mosquito. They don’t get ill from the diseases and don’t develop high enough levels of the diseases to spread them, but the we can still check for the diseases in their blood. They are also called ‘Sentinel Chickens.’
D17vV TIL During WWI female munitions workers were nicknamed "Canary Girls" because exposure to TNT is toxic, and repeated exposure turns the skin an orange-yellow colour reminiscent of the plumage of a canary
b9k9E TIL that when the USS Susan B. Anthony sank in 1944, after it was hit by a mine off the coast of Normandy, all 2,689 people aboard were saved. According to the Guinness world book of Records, this is the largest rescue of people without loss of life.