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TIL that on the atoll of Pinglelap, 10% of the population is affected by total colorblindness, with another 30% being unaffected carriers of the gene. This is due to a population bottleneck caused by a typhoon in 1775 that left 20 survivors on the atoll. One carried the colorblindness gene.

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bG5E TIL a Harvard student lost his internship at Facebook after pointing out a privacy vulnerability which he found on their servers. Ironically, Mark Zuckerberg defended himself when he did the same with Harvard’s servers while studying there.
E1E1x TIL Henry VIII had people who were called “Grooms of the Stool” who’s job was to wipe his bottom. During his reign he had four such people, all of them were knighted.
BrLjy TIL the toaster was invented by Scotsman Alan MacMasters in 1893 and has not changed much since.
V0A0 TIL the same castle in Scotland was used as Winterfell and throughout Monty Python and the Holy Grail
6EJ47 TIL one of the oldest cinematic universes is the Universal Monsters series, which featured Dracula, Frankenstein, The Invisible Man, Wolf Man, and a recurring cast of characters from 1931 to 1951