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TIL that more men than women are colorblind, not because knowing colors is considered a feminine trait, but because it is a sex-linked gene. Colorblindness is a recessive trait on the X chromosome, so men only need one bad X to be colorblind, whereas women need two.

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dpmK TIL Argentina is one of the whitest counties in the world with a white population of 97%.
9wvLr TIL that Jim Morrison loved reading so much, that he once excused himself from class, telling his teacher he needed to get a "brain tumour" removed, and instead spent the rest of the day reading. When Jim was offered a graduation gift from his parents, he chose the complete works of Nietzsche.
yVy1w TIL the World Record for longest name is held by a man whose name contained 746 letters and 27 words. Each of his 26 surnames started with a different letter, in alphabetical order. His last name told the story of a Wolf-Slayer whose ancestors came here on a tungsten spaceship 1.2 million years ago.
JYbgl TIL K9s are trained to sniff for hidden electronic devices like thumb drives, HDDs, phones and laptops.
kJpJB TIL that mathematician John von Neumann had an unusual ability to solve new problems. When presented with a problem in programming on which there had been no published literature, he said "Oh, that!", then gave a lecture of over an hour explaining how to solve it using a hitherto unconceived theory