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TIL - A teratoma is a tumor made up of several types of tissue, such as hair, muscle, teeth, or bone. Teratomata typically form in the tailbone (where it is known as a sacrococcygeal teratoma), ovary, or testicle

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6E9AY TIL MythBusters tested and confirmed feces fly when you flush and have been found on 24/24 tested toothbrushes
m1Lvy TIL A parasite of the Greenland shark is Ommatokoita elongata. This copepod attaches itself to the eyes of the shark causing lesions which cause impaired vision and even blindness. Usually, only one eye is affected by a single copepod. Some believe that the copepod attracts prey for the shark.
ANWQl TIL That during the filming of the longest day, the cast found a tank buried in the beach. It was cleaned up and used in the movie.
KYOLG TIL that Cambridge University classified a dog as a cat to get around its canine ban on campus
N7b5N TIL that Brian Wilson of the Beach Boys got an F in his high school Music class for writing what would become their breakout hit "Surfin'". The grade was later changed to an A in 2018 when Wilson was 75.