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TIL of the fish kick, a technique in swimming where the swimmer turns sideways and mimics the motion of an eel. It is arguably the fastest way to swim and was once famously used in the 2000 Olympics by Misty Hyman to win the 200m butterfly. However, this kick is rarely used owing to its difficulty.

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16Q8D TIL about the Pascaline, a mechanical calculator invented by Blaise Pascal in 1642 to help his father, who was supervisor of taxes in Rouen. The Pascaline added and subtracted two numbers, and multipled and divided through series of additions or substractions
nexbG TIL of The Shaggs: three teenage sisters forced to play in a band by their father. Almost completely musically inept, their album failed to gain any traction until years after it was recorded, when Frank Zappa claimed it was one of his favorite albums of all time.
mxDMp TIL that John F. Kennedy's brother, Robert Kennedy, was assassinated as well, by a 22 year old palestinian christian
0dPpL TIL about British politician Tony Benn met his future spouse in Oxford in 1949. Nine days later, he proposed marriage to her on a park bench. Subsequently, he purchased the bench from Oxford City Council and installed it in the garden of their home. The couple remained together for 51 years.
BEkr TIL that the symbols and squiggles that are used to represent a bad word are called “grawlixes”