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TIL that all-pro NFL running back Christian McCaffrey's grandfather was the silver medalist in the 100 Meters at the 1960 Olympics, losing the Gold medal in a photo finish.

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VMRGp TIL that science behind tattoos revolves around immune cells known as macrophages. These cells consume foreign debris and come rushing when one is wounded. Once the needle is pierced, they suck up the ink and keep it intact. The process keeps repeating once the old cells die and new rush to rescue
4rwJ TIL ‘No Animals Were Harmed’ only applies while film is actually recording
eG5E TIL in 2007, doctors treated a one year old boy that had mysteriously grown pubic hair and an abnormally large penis. Investigations revealed the father had inadvertently exposed the child to topical testosterone gel when cuddling him, which had been prescribed to treat the father’s low libido.
7801X TIL that after Lord Palmerston's death, Queen Victoria wrote that she had never liked or respected him: "Strange, and solemn to think of that strong, determined man, with so much worldly ambition – gone! He had often worried and distressed us, though as Pr. Minister he had behaved very well."
9YxaX TIL in 2015 a high school student won a $425k settlement after being suspended for 2 months for replying “Actually, yeah” to an internet post asking if he made out with a teacher.