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TIL that Tibetans underwent the fastest genetic change ever observed in humans. Biologists found 30+ genes with DNA mutations more prevalent in Tibetans than their predecessors, the Han Chinese, half of which help the body regulate oxygen use. They even have a "super-athlete gene" called EPAS1.

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grKl7 TIL of the Hundred Horse Chestnut, the largest and oldest chestnut in the world which according to legend was large enough to give shelter to 100 knights and their horses inside its trunk during a storm, hence its name, the girth of the trunk is 57.9 meters (190 ft)
XErWk TIL about "The Demon Core", a mass of plutonium that was responsible for the death of two scientists on two separate occasions.
8dP TIL a school in Mississippi put together a fake prom only to invite the gay and disabled students, while the rest of the school went to prom at a secret location. (#6)
4kgQw TIL that the original Samsung Galaxy Note was criticised for being "too big" with it's 5.3" screen, and that people would look "like a fool" holding the phone up to use the video call function.
rRdnw TIL about the history of Alberta's extensive and effective rat control solution making it the only Canadian province to still be considered rat free